Effective Date: August 26, 2020

TABLE 1-Inorganic Chemicals And Physical Characteristics Maximum Contaminant Level Determination

Contaminants1,2 MCL (mg/l)3 Determination of MCL violation
Asbestos 7.0 Million fibers/liter (MFL)
(Longer than 10 microns)
If the results of a monitoring sample analysis exceed the MCL, the supplier of water shall collect one more sample from the same sampling point within 2 weeks or as soon as practical.

An MCL violation for all contaminants listed in this table, except for Arsenic, occurs when the average4 of the initial and any confirmation sample exceeds the MCL.

MCL violations for Arsenic will be determined as follows:

Compliance with the Arsenic MCL shall be determined based on the analytical result(s) obtained at each sampling point.

For systems which are conducting monitoring at a frequency greater than annual, an Arsenic MCL violation occurs when the running annual average11,12,13 at any sampling point is greater than the MCL. If any one sample would cause the annual average to exceed the MCL at any sampling point, the system is out of compliance with the MCL immediately.

Systems monitoring annually or less frequently whose sample result exceeds the Arsenic MCL11 must begin quarterly sampling14. The system will not be considered in violation of the MCL until it has completed one year of quarterly sampling and the running annual average11,12,13 at that sampling point is greater than the Arsenic MCL. If any one sample would cause the annual average to exceed the MCL at any sampling point, the system is out of compliance with the MCL immediately.
Antimony0.006
Arsenic0.010
Barium2.00
Beryllium0.004
Cadmium0.005
Chromium0.10
Cyanide (as free Cyanide)0.25,6
Mercury0.002
Selenium0.05
Silver0.1
Thallium0.002
Fluoride2.2
Chloride250.0
Iron0.37
Manganese0.37
SodiumNo designated limits8
Sulfate250.0
Zinc5.0
Color15 Units
Odor3 Units
Bromate50.010Compliance is based on a running annual average of monthly samples, computed quarterly. If the average of samples covering any consecutive four-quarter period exceeds the MCL, the system is in violation of the MCL and must notify the public.
Chlorite61.0Compliance is based on an average of each three-sample set taken in the distribution system in accordance with Table 8B. If the average exceeds the MCL, the system is in violation of the MCL and must notify the public.

Table 1 Footnote 1 If EPA Methods 200.7 or 200.9 are used, the MDLs determined when samples are analyzed by direct analysis (i.e., no sample digestion) will be higher, because they were determined using a 2x preconcentration step during sample digestion. Consider the need topreconcentrate, or the use of multiple in-furnace depositions to achieve required MDLs. For direct analysis of cadmium by Method 200.7, sample preconcentration using pneumatic nebulization may be required toachieve lower detection limits.

Preconcentration may also be required for direct analysis of antimony, lead, and thallium by Method 200.9; antimony and lead by Standard Methods 3113 B; and lead by ASTM Method D3559–90D, unless multiple in-furnace depositions are made.
Table 1 Footnote 2 When metals or nitrate samplesare collected, they may be acidified with a concentrated acid or a dilute (50% by volume) solution of the applicable concentrated acid. This acidification may be done at the laboratory rather than at the time of sampling, provided the shipping time and other instructions in Section 8.3 of EPA Methods 200.7, 200.8, or 200.9 are followed.
Table 1 Footnote 3 mg/l = Milligrams per liter.
Table 1 Footnote 4 Rounded to the same number of significant figures as the MCL for the contaminant in question.
Table 1 Footnote 5 If Ligand Exchange and Amperometry is used for cyanide analysis; either ASTM Method D6888-04 or Method OIA–1677, DW, “Available Cyanide by Flow Injection, Ligand Exchange, and Amperometry,” January 2004 are approved. EPA–821–R–04–001, is available from ALPKEM, A Division of OI Analytical, P.O. Box 9010, College Station, TX 77842–9010; sulfide levels below those detected using lead acetate paper may produce positive method interferences. Samples should be tested using a more sensitive sulfide method to determine if a sulfide interference is present, and samples shall be treated accordingly.
Table 1 Footnote 6 Cyanide samples must be adjusted with sodium hydroxide to pH 12 at the time of collection. The sample must be shipped and stored at 4 °C or less.
Table 1 Footnote 7 If iron and manganese are present, the total concentration of both should not exceed 0.5 mg/l. Higher levels may be allowed by the State when justified by the supplier of water.
Table 1 Footnote 8 Water containing more than 20 mg/l of sodium should not be used for drinking by people on severely restricted sodium diets.
Water containing more than 270 mg/l of sodium should not be used for drinking by people on moderately restricted sodium diets.
Table 1 Footnote 9Community and nontransient noncommunity systems using ozone for disinfection or oxidation must comply with the bromate standard.
Table 1 Footnote 10 Community and nontransient noncommunity systems using chlorine dioxide as a disinfectant or oxidant must comply with the chlorite standard.
Table 1 Footnote 11 Arsenic sampling results shall be reported to the nearest 0.001 mg/L.
Table 1 Footnote 12 Any sample below the method detection limit shall be calculated at zero for the purpose of determining the annual average. If a system fails to collect the required number of samples, compliance (average concentration) will be based on the total number of samples collected.
Table 1 Footnote 13 If confirmation samples are collected, the average of the initial sample and any confirmation samples will be used for the determination of compliance and future monitoring requirements.
Table 1 Footnote 14 Systems are only required to conduct the increased monitoring frequency at the sampling point where the MCL was exceeded and for only the specific contaminant(s) that triggered the system into the increased monitoring frequency.

footnotes 1,2,5,6,9,10 from 2018-01-17
footnotes 11-14 from 2006-11-01 (were 7-10)


Effective Date: May 16, 2018

TABLE 2-Nitrate, Nitrate, Total Nitrate/Nitrate Maximum Contaminant Level Determination

ContaminantMCLDetermination of MCL violation
Nitrate110 (as Nitrogen)2If the results of a monitoring sample analysis exceed the MCL, the supplier of water shall collect another sample from the same sampling point, within 24 hours of the receipt of results or as soon as practical.3 An MCL violation occurs when the average of the two results exceeds the MCL.
Nitrite 1 (as Nitrogen)
Total Nitrate and Nitrite10 (as Nitrogen)

Table 2 Footnote 1 Nitrate samples are to be shipped and stored at 4 °C or less and analysed within 48 hours of collection. If the sample is chlorinated, the holding time for an unacidified sample kept at 4 °C is extended to 14 days.
Table 2 Footnote 2 An MCL of 20 mg/l may be permitted at a noncommunity water system if the supplier of water demonstrates that:

a. the water will not be available to children under six months of age;
b. a notice that nitrate levels exceed 10 mg/l and the potential health effects of exposure will be continuously posted according to the requirements of a Tier 1 notification;
c. the State will be notified annually of nitrate levels that exceed 10 mg/l; and
d. no adverse health effects shall result.


Table 2 Footnote 3 Systems unable to collect an additional sample within 24 hours must issue a Tier 1 notification and must collect the additional sample within two weeks of receiving the initial sample results.

Effective Date: August 26, 2020

TABLE 3-ORGANIC CHEMICALS MAXIMUM CONTAMINANT LEVEL DETERMINATION

ContaminantMCL
(mg/l)
Type of water systemDetermination of MCL violation
General Organic ChemicalsCommunity, NTNC and Noncommunity If the results of a monitoring sample analysis exceed the MCL, the supplier of water shall collect one to three more samples from the same sampling point, as soon as practical, but within 30 days. An MCL violation occurs when at least one of the confirming samples is positive1 and the average of all confirming samples and the initial sample exceeds the MCL.
Principal organic contaminant (POC)
0.005
Unspecified organic contaminant (UOC)
0.05
Total POCs and UOCs
0.1
Disinfection Byproducts2,3 Community and NTNC For systems required to monitor quarterly, the results of all analyses at each monitoring location per quarter shall be arithmetically averaged and shall be reported to the State within 30 days of the public water system’s receipt of the analyses. A violation occurs if the average of the four most recent sets of quarterly samples at a particular monitoring location (12-month locational running annual average (LRAA)) exceeds the MCL. If a system collects more than one sample per quarter at a monitoring location, the system shall average all samples taken in the quarter at that location to determine a quarterly average to be used in the LRAA calculation. If a system fails to complete four consecutive quarters of monitoring, compliance with the MCL will be based on an average of the available data from the most recent four quarters. An MCL violation for systems on annual or less frequent monitoring that have been increased to quarterly monitoring as outlined in Table 9A, is determined after four quarterly samples are taken.
Total trihalomethanes
0.080
Haloacetic Acids
0.060
  
Transient Noncommunity Not applicable.
Specific Organic ChemicalsCommunity, NTNC and Noncommunity If the results of a monitoring sample analysis exceed the MCL, the supplier of water shall collect one to three more samples from the same sampling point, as soon as practical, but within 30 days. An MCL violation occurs when at least one of the confirming samples is positive1 and the average of the initial sample and all confirming samples exceeds the MCL.
Alachlor.002
Aldicarb.003
Aldicarb sulfone.002
Aldicarb sulfoxide.004
Atrazine4.003
Benzo(a)pyrene.0002
Carbofuran.04
Chlordane.002
Di (2-ethylhexyl) phthalate.006
Dibromochloropropane (DBCP).0002
2,4-D.05
Dinoseb.007
1,4-Dioxane.0010
Diquat.02
Endrin.002
Ethylene dibromide (EDB).00005
Heptachlor.0004
Heptachlor epoxide.0002
Hexachlorobenzene.001
Lindane.0002
Methoxychlor.04
Methyl-tertiary-butyl-ether (MTBE).010
Pentachlorophenol.001
Perfluorooctanesulfonic acid (PFOS).0000100
Perfluorooctanoic acid (PFOA).0000100
Polychlorinated biphenyls (PCBs)5.0005
Propylene Glycol1.0
Simazine.004
Toxaphene.003
2,4,5-TP (Silvex).01
2,3,7,8-TCDD (Dioxin).00000003
Vinyl Chloride.002

Table 3 Footnote 1 A sample is considered positive when the quantity reported by the State approved laboratory is greater than or equal to the method detection limit.
Table 3 Footnote 2 Systems using surface water or ground water under the direct influence of surface water and serving 10,000 or more people must comply with the disinfection byproducts standards by January 1, 2002. Systems using surface water or ground water under the direct influence of surface water and serving fewer than 10,000 people, or systems using ground water must comply by January 1, 2004. Until then, community water systems serving fewer than 10,000 persons must comply with an MCL of 0.1 mg/L for total trihalomethanes.
Table 3 Footnote 3 A system that is installing granular activated carbon (GAC) or membrane technology to comply with the trihalomethane and haloacetic acid MCLs may apply to the State for an extension of up to 24 months past the compliance dates for those MCLs. Systems must comply with any interim measures and schedules of compliance set by the State.
Table 3 Footnote 4 Syngenta Method AG–625, “Atrazine in Drinking Water by Immunoassay,” February 2001, available from Syngenta Crop Protection, Inc., 410 Swing Road, P.O. Box 18300, Greensboro, NC 27419 Telephone: 336–632–6000, may not be used for the analysis of atrazine in any system where chlorine dioxide is used for drinking water treatment. In samples from all other systems, any result for atrazine generated by Method AG–625 that is greater than one-half the maximum contaminant level (MCL) (in other words, greater than 0.0015 mg/L or 1.5 μg/L) must be confirmed using another approved method for this contaminant and should use additional volume of the original sample collected for compliance monitoring. In instances where a result from Method AG–625 triggers such confirmatory testing, the confirmatory result is to be used to determine compliance.
Table 3 Footnote 5 If PCBs (as one of seven Aroclors) are detected in any sample analyzed using EPA Method 505 or 508, the system shall reanalyze the sample using EPA Method 508A to quantitate PCBs (as decachlorobiphenyl). Compliance with the PCB MCL shall be determined based upon the quantitative results of analyses using Method 508A.

Effective Date: May 16, 2018

TABLE 3A-Maximum Residual Disinfectant Level (MRDL) Determination

DisinfectantMRDL1 (mg/L)Type of water systemDetermination of MRDL violation
Chlorine4.0 (as Cl2)Community and NTNC using chlorine or chloramines as disinfectant or oxidantCompliance is based on a running annual arithmetic average, computed quarterly, of monthly averages of all samples collected by the system. If the running annual average exceeds the MRDL, the system is in violation and must notify the public.
Chloramines24.0 (as Cl2)
Chlorine Dioxide0.8 (as ClO2)Community, NTNC, and Transient Noncommunity using chlorine dioxide as disinfectant or oxidantPublic Health Hazard (Acute Violation)

Compliance is based on daily samples collected by the system. If any daily sample taken at the entrance to the distribution system exceeds the MRDL, and on the following day one (or more) of the three samples taken in the distribution system exceeds the MRDL, the system is in violation.

Nonacute Violation

Compliance is based on daily samples collected by the system. If any two consecutive daily samples taken at the entrance to the distribution system exceed the MRDL, and all distribution system samples taken are below the MRDL, the system is in violation.


Table 3A Footnote 1 The monitoring and MRDL requirements for chlorine and chloramines in this column apply to community or nontransient noncommunity water systems that are consecutive systems that do not add a disinfectant, but deliver water that has been treated with primary or residual disinfection other than ultraviolet light.
Table 3A Footnote 2 In cases where systems switch between the use of chlorine and chloramines for residual disinfection during the year, compliance must be determined by including together all Cl2 monitoring results of both chlorine and chloramines.

Effective Date this version: November 01, 2006 (footnote added May 16, 2018)

TABLE 4-ENTRY POINT TURBIDITY
MAXIMUM CONTAMINANT LEVEL DETERMINATION1,2

Contaminant MCL Determination of MCL violation
Entry point turbidity
(surface water and ground water directly influenced by surface water)
1 NTU3,5
(Monthly Average)
A violation occurs when the average of all daily entry point analyses for the month exceeds the MCL rounded off to the nearest whole number
5 NTU4,5 A violation occurs when the average of two consecutive daily entry point analyses exceeds the MCL rounded off to the nearest whole number.

Table 4 Footnote 1 The requirements of this table apply to unfiltered systems that the State has determined, in writing pursuant to section 5-1.30 of this Subpart, must install filtration, until filtration is installed.

Footnote 2 added 2018-05-16, old 2, 3 and 4 moved to 3, 4 and 5.


Table 4 Footnote 2 If formazin is used for turbidity testing, styrene divinyl benzene beads (e.g., AMCO-AEPA–1 or equivalent) and stabilized formazin (e.g., Hach StablCalTMor equivalent) may be substituted for formazin.
Table 4 Footnote 3 If the daily entry point analysis exceeds one NTU, a repeat sample must be taken as soon as practicable and preferably within one hour. If the repeat sample exceeds one NTU, the supplier of water must make State notification. The repeat sample must be used for the monthly average and the two consecutive day average.
Table 4 Footnote 4 If the two consecutive day average exceeds the MCL, the supplier of water shall analyze for microbiological contamination at a point downstream of the first consumer, but as close to the first consumer as is feasible. The additional microbiological sample should be taken within one hour as soon as feasible after determining the two consecutive day average. The supplier of water shall report the result of this microbiological analysis to the State within 48 hours of obtaining the result. The result of this analysis shall not be used for monitoring purposes.
Table 4 Footnote 5 NTU = Nephelometric Turbidity Units

Effective Date: May 26, 2004. Footnotes changed January 17, 2018.

TABLE 4A-Surface Water Turbidity Performance Standards 1

Contaminant Filtration type Performance standard1 Determination of treatment technique
Filtered water turbidity Conventional filtration 0.3 NTU3,5 A treatment technique violation occurs if more than five percent of the composite filter effluent measurements taken each month exceed the performance standard values. The turbidity level of representative samples of the filtered water must at no time exceed 1 NTU.4,5
Slow sand filtration 1.0 NTU3 A treatment technique violation occurs if more than five percent of the composite filter effluent measurements taken each month exceed the performance standard values. The turbidity level of representative samples of the filtered water must at no time exceed 5 NTU.
Diatomaceous earth filtration 1.0 NTU3
Alternative Filtration1.0 NTU3,4

2018-01-17: Footnotes 2 and 5 added, 2 and 3 renumbered to 3 and 4, previous 4 and 5 deleted as irrelevant.


Table 4A Footnote 1 The standards apply to systems with surface water sources or ground water sources directly influenced by surface water.
Table 4A Footnote 2 If formazin is used for turbidity testing, styrene divinyl benzene beads (e.g., AMCO-AEPA–1 or equivalent) and stabilized formazin (e.g., Hach StablCalTMor equivalent) may be substituted for formazin.
Table 4A Footnote 3 NTU = Nephelometric Turbidity Unit.
Table 4A Footnote 4 The performance standard applies to alternative filtration technologies capable of complying with requirement of section 5-1.30(b) of this Subpart as demonstrated to the department by pilot studies, unless the department sets a turbidity performance standard for a specific system.
Table 4A Footnote 5 If the combined filter effluent turbidity exceeds 1 NTU, the system must consult with the State in accordance with section 5-1.78(d)(3) of this Subpart.

TABLE 5-DISTRIBUTION SYSTEM TURBIDITY
MAXIMUM CONTAMINANT LEVEL DETERMINATION

Contaminant MCL Determination of MCL violation
Distribution point turbidity 5 NTU A violation occurs when the monthly average of the results of all distribution samples collected in any calendar month exceeds the MCL rounded off to the nearest whole number.

Effective Date: May 16, 2018

TABLE 6. Microbiological Contaminants Maximum Contaminant Level (MCL)/Treatment Technique Trigger (TTT)/ Treatment Technique Violation (TTV) Determination

Contaminant/Trigger/Violation Sample Location MCL or TTT or TTV Performance Standard1 Determination of MCL/TTV and TTT
Total coliform Distribution Sample Sites TTT3 No positive sample.4,6 A Level 1 TTT occurs at systems collecting 40 or more samples per month when more than 5.0 percent of the samples are total coliform positive.
TTT3 A Level 1 TTT occurs at systems collecting less than 40 samples per month when two or more samples are total coliform positive.
TTT3 A Level 1 TTT occurs at any system that fails to collect every required repeat sample after any single total coliform positive sample.
TTT5 A Level 2 TTT occurs at any system that has a second Level 1 trigger within a rolling 12-month period, unless the State has determined a likely reason that the samples that caused the first Level 1 TTT were total coliform positive and has established that the system has corrected the problem.
Escherichia coli
(E. coli)
MCL/TTT2,5 No positive sample4,6 An MCL violation and Level 2 TTT occur when a total coliform positive sample is positive for E. coli and a repeat total coliform sample is positive.
MCL/TTT2,5 An MCL violation and Level 2 TTT occur when a total coliform sample is positive for total coliform but negative for E. coli and a repeat total coliform sample is positive for E. coli or not analyzed for E. coli.
MCL/TTT2,5 An MCL violation occurs when a system fails to collect every required repeat sample after any E. coli positive routine sample.
Fecal indicator: E. coli, and/or enterococci, and/or coliphage Untreated Water from a Ground Water Source TTV2 No fecal indicator in samples collected from raw source water from a ground water source.7 A TTV occurs when a raw water sample is positive for the fecal indicator contaminant and system does not provide and document, through process compliance monitoring, 4-log virus treatment during peak flow at first customer. If repeat sampling of the raw water is directed by the State and all additional samples are negative for fecal indicator, there is no TTV.7
Other trigger or violationTTVA TTV occurs when a system exceeds a TTT and then fails to conduct the required assessment or corrective actions.
TTVA TTV occurs when a seasonal system fails to complete a State-approved start-up procudure prior to serving water to the public.

Table 6 Footnote 1 All samples collected in accordance with Table 11 footnotes 1 and 2 and Table 11B of this section and samples collected in accordance with subdivision 5-1.51(g) of this Subpart shall be included in determining compliance with the MCL, TTT, and/or TTV unless any of the samples have been invalidated by the State.
Table 6 Footnote 2 For notification purpose, an E. coli MCL violation is a public health hazard requiring Tier 1 notification. At a ground water system, Tier 1 notification is required after initial detection of E. coli or other fecal indicator in raw source water, if the system does not provide 4-log virus treatment and process compliance monitoring, even if not confirmed with additional sampling.
Table 6 Footnote 3 The system must complete a Level 1 assessment as soon as practical after exceeding any Level 1 TTT. The system must submit the completed Level 1 assessment form to the State within 30 days after the system learns that it has exceeded a trigger. Corrective actions shall be addressed in accordance with section 5-1.71(e) of this Subpart.
Table 6 Footnote 4 See Table 13 for public notification requirements.
Table 6 Footnote 5 A Level 2 assessment must be completed within 30 days after the system learns that it has exceeded a trigger. Corrective actions shall be addressed in accordance with section 5-1.71(e) of this Subpart.
Table 6 Footnote 6 If any total coliform or E. coli sample is positive, repeat samples must be collected in accordance with Table 11B of this section.
Table 6 Footnote 7 If raw water source sample is fecal indicator positive, the water system, in consultation with the State, may collect an additional 5 samples within 24 hours at each source that tested fecal indicator positive. If none of the additional samples are fecal indicator positive, then there is no TTV. Note that Tier 1 notification must be made after the initial raw water fecal indicator positive sample, even if it is not confirmed with additional sampling.

Effective Date: December 21, 2005. Footnotes changed January 17, 2018.

TABLE 7-RADIOLOGICAL
MAXIMUM CONTAMINANT LEVEL DETERMINATION1

Contaminant MCL Type of water system Determination of MCL violation2
Combined radium-226 and radium-228 5 picocuries per liter Community A violation occurs when a sample or the annual average of samples at any sampling point exceeds the MCL.3,4,5,6,7
Gross alpha activity (including radium-226 but excluding radon and uranium) 15 picocuries per liter
Uranium8 30 micrograms per liter
Beta particle and photon radioactivity from manmade radionuclides Four millirems per year as the annual dose equivalent to the total body or any internal organ.9 Community Water Systems designated by the State as vulnerable A violation occurs when a sample or the annual average of samples at any sampling point exceeds the MCL.3,4,5,7,9,10,11
Community systems designated by the State as utilizing waters contaminated by effluents from nuclear facilities

2018-01-17 footnote 8 added, old 8-10 renumbered to 9-11.


Table 7 Footnote 1 The Radionuclides Rule including the MCLs and minimum monitoring requirements applies to only community water systems.
Table 7 Footnote 2 To judge compliance with the maximum contaminant levels, averages of data shall be used and shall be rounded to the same number of significant figures as the maximum contaminant level for the substance in question.
Table 7 Footnote 3 For systems monitoring more than once per year, compliance with the MCL is determined by a running annual average at each sampling point. If the average of any sampling point is greater than the MCL, then the system is out of compliance with the MCL.
Table 7 Footnote 4 For systems monitoring more than once a year, if any sample result will cause the running average to exceed the MCL at any sample point, e.g., a single sample result is greater than four times of the MCL, the system is out of compliance with the MCL immediately.
Table 7 Footnote 5 If a system does not collect all required samples when compliance is based on a running annual average of quarterly samples, compliance will be based on the running average of the samples collected.
Table 7 Footnote 6 If a sample result is less than the detection limit, zero will be used to calculate the annual average, unless a gross alpha particle activity is being used in lieu of radium-226 and/or uranium. If the gross alpha particle activity result is less than detection and is substituted for radium-226 and/or uranium, ½ the detection limit will be used to calculate the annual average.
Table 7 Footnote 7 If the MCL for radioactivity in this Table is exceeded, the community water system must give notice to the State.
Table 7 Footnote 8 If uranium (U) is determined by mass-type methods (i.e., fluorometric or laser phosphorimetry), a 0.67 pCi/μg of uranium conversion factor must be used.
Table 7 Footnote 9 A system must determine compliance with the MCL for beta particle and photon radioactivity by using the calculation described below:
(pCi/L found in sample (from laboratory results)) / (pCi/L equivalent of 4 mrem of exposure) = fraction of the maximum 4 mrem/year exposure limit
Table 7 Footnote 9 To determine compliance with the MCL, a system must monitor at a frequency as described in Table 12.
Table 7 Footnote 10 If the results show an MCL violation for any of the constituents, the system must conduct monthly monitoring for all species at any sampling point that exceeds the MCL. Monitoring must be conducted in accordance with Table 12 in this section. A system can resume quarterly monitoring if the rolling average of three months of samples is at or below the MCL.

Table 8A. Inorganic Chemicals and Physical Characteristics
Minimum Monitoring Requirements For Asbestos

Contaminant Type of water system
Initial Frequency by Source Type5
Repeat sampling and compliance
Ground water only Surface and groundwater
Asbestos1 Community and NTNC One sample at entry point by 12/31/952,3,4 One sample at entry point by 12/31/952,3,4 If GT MCL, one sample quarterly6,7

If LT MCL, one sample every nine years


GT - Greater Than      LT - Less than

Table 8A Footnote 1 If a system is not vulnerable to asbestos contamination, either at its source or due to corrosion of asbestos cement pipe, it is not required to monitor if granted a waiver by the state. The waiver must be renewed by the state every nine years. The basis for a waiver must include the following:

a. Lack of potential asbestos contamination of the water source
b. No use of asbestos cement pipe for finished water distribution and noncorrosive nature of the water.


Table 8A Footnote 2 If asbestos monitoring data collected after January 1, 1990 are consistent with the requirements of this table, the State may allow systems to use that data to satisfy the initial monitoring requirement beginning January 1, 1993.
Table 8A Footnote 3 If a system is vulnerable to asbestos contamination due to source water and corrosion of asbestos cement pipe or solely to corrosion of asbestos cement pipe, it shall take one sample at a tap served by asbestos cement pipe and under conditions where asbestos contamination is most likely to occur.
Table 8A Footnote 4 If a system is vulnerable to asbestos contamination due to source water only, monitoring shall be conducted as follows:

Groundwater - Collect a minimum of one sample at each entry point to the distribution system representative of each well after treatment.

Surface water - Collect a minimum of one sample at each entry point to the distribution system after any application of treatment or in the distribution system at a point which is representative of each source after treatment.


Table 8A Footnote 5 For both types of water sources the system shall take each sample at the same sampling point unless conditions make another sampling point more representative of each source or treatment plant. If a system draws water from more than one source and the sources are combined before distribution; the system must sample at an entry point to the distribution system during periods of normal operating conditions when water is representative of all sources.
Table 8A Footnote 6 A system which exceeds the MCL for asbestos shall monitor quarterly beginning in the next quarter after the violation occurred.
Table 8A Footnote 7 The State may decrease the quarterly monitoring requirement to the initial sampling requirement provided that the State has determined that the system is reliably and consistently below the MCL on the basis of a minimum of two quarterly groundwater samples and a minimum of four quarterly samples for surface water.

Effective Date: May 26, 2004. Date deadlines removed and footnotes changed in January 17, 2018.

Table 8B-Inorganic Chemicals and Physical Characteristics
Minimum Monitoring Requirements

Contaminant Type of water system Initial frequency by source type1 Accelerated Sampling2
Ground water only Surface only or surface and ground water
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
Cyanide
Mercury
Nickel
Selenium
Thallium
Fluoride
Community and NTNC3,4,5 One sample per entry point every 3 years One sample per entry point per year 9 If GT MCL, one sample quarterly. 6,7

If LT MCL, maintain initial frequency.

Transient Noncommunity State discretion8 State discretion8 State discretion8
Bromate9Community and NTNC using ozone for disinfection or oxidationOne sample per month at each entry point10, 11 One sample per month at each entry point10, 11 State discretion8
Chlorite12Community and NTNC using chlorine dioxide for disinfection or oxidationDaily samples at each entry point. Additional three-sample set monthly in the distribution system11, 13, 14, 15 Daily samples at each entry point. Additional three-sample set monthly in the distribution system11, 13, 14, 15State discretion8
GT - Greater Than      LT - Less than

Table 8B Footnote 1 For all types of water sources the system shall take each sample at the same sampling point unless conditions make another sampling point more representative of each source or treatment plant. If a system draws water from more than one source and the sources are combined before distribution, the system must sample at an entry point to the distribution system during periods of normal operating conditions when water is representative of all sources, or separately at the individual sources. The State may allow systems to composite samples in accordance with the conditions in Appendix 5-C. All samples taken and analyzed in accordance with the monitoring plan must be included in determining compliance, even if the number is greater than the minimum required.
Table 8B Footnote 2 The average of the initial and confirmation sample contaminant concentration at each sampling point shall be used to determine compliance with the MCL.
Table 8B Footnote 3 A waiver from the required initial monitoring frequencies may be granted by the State, based upon the following conditions:

a. A minimum of one sample shall be collected while the waiver is effective;
b. Surface water systems must have monitored annually for at least three years and groundwater systems must have conducted a minimum of three rounds of monitoring with at least one sample taken since January 1, 1990;
c. All results must be less than the MCL;
d. New sources are not eligible for a waiver until completion of three rounds of sampling; and
e. Waivers issued by the State shall be made in writing, shall cite the basis for determination and shall not exceed a maximum of nine years.


Table 8B Footnote 4 To determine the appropriate reduced monitoring frequency, the State shall consider:

a. reported concentrations from all previous monitoring;
b. variations in reported concentrations; and
c. other factors which may affect contaminant concentrations such as changes in groundwater pumping rates, changes in the system's configuration, operating procedures, stream flows or other characteristics.


Table 8B Footnote 5 The State may require or the water system may request more frequent monitoring frequencies than is minimally required. The State, at its discretion, may require confirmation samples for positive and negative results.
Table 8B Footnote 6 The State may decrease the quarterly monitoring requirement to the initial sampling requirement provided that it is determined that the system is reliably and consistently below the MCL on the basis of a minimum of two quarterly groundwater samples and a minimum of four quarterly samples for surface water.
Table 8B Footnote 7 If concentrations of a listed contaminant exceed the MCL, the Department requires the collection of an additional sample as soon as possible but not to exceed two weeks.
Table 8B Footnote 8 State discretion shall mean requiring monitoring when the State has reason to believe the MCL has been violated, the potential exists for an MCL violation or the contaminant may present a risk to public health.
Table 8B Footnote 9 Community and nontransient noncommunity systems using ozone for disinfection or oxidation must comply with the bromate monitoring requirement.

40CFR141.132(b)(3)(ii)(B) consistently uses 0.0025. 2018-01-17 Part 5-1 pdf and SR changes show 0.025 in second and third values. That value is over the MCL and most likely a typo. Federal values shown here.


Table 8B Footnote 10 Systems required to analyze for bromate may reduce monitoring from monthly to once per quarter, if the system’s running annual average bromate concentration is ≤0.0025 mg/l based on monthly bromate measurements for the most recent four quarters. A system may remain on reduced bromate monitoring until the running annual average source water bromide concentration, computed quarterly, is equal to or greater thathan 0.0025 mg/L. If the average bromide concentration is equal to or greater than 0.0025 mg/L, the system must resume routine monthly bromate monitoring.
Table 8B Footnote 11 Failure to monitor will be treated as a monitoring violation for the entire period covered by an annual average where compliance is based on an annual average of monthly or quarterly samples or averages and a system's failure to monitor makes it impossible to determine MCL compliance.
Table 8B Footnote 12 Community and nontransient noncommunity systems using chlorine dioxide as a disinfectant or oxidant must comply with the chlorite monitoring requirement.
Table 8B Footnote 13 On each day following a sample result that exceeds the chlorite MCL at the entrance to the distribution system, the system must take three chlorite distribution system samples at the following locations: as close to the first customer as possible, in a location representative of average residence time, and in a location representative of maximum residence time. The samples comprising the three-sample set required for routine monitoring must be collected at the same three locations in the distribution system that are used when following up on a daily MCL exceedance at the entry point. The system may use results of additional monitoring, conducted as the result of an entry point MCL exceedance, to meet the requirement for routine monthly monitoring.
Table 8B Footnote 14 Daily chlorite monitoring at the entrance to the distribution system may not be reduced. Monthly chlorite monitoring in the distribution system may be reduced to one three-sample set per quarter after one year of monitoring where no individual chlorite sample taken in the distribution system has exceeded the chlorite MCL. If the system has had to conduct distribution system monitoring as a result of an MCL exceedance at the entry point, the system cannot reduce monitoring. The system may remain on a reduced monitoring schedule until either any of the three individual chlorite samples taken quarterly in the distribution system exceeds the chlorite MCL or the system is required to conduct distribution system monitoring because of an entry point chlorite MCL exceedance.
Table 8B Footnote 15 A system must monitor according to its monitoring plan as described in section 5-1.51(c) of this Subpart. Failure to monitor in accordance with the monitoring plan is a monitoring violation.

TABLE 8C-INORGANIC CHEMICALS AND PHYSICAL CHARACTERISTICS
MINIMUM MONITORING REQUIREMENTS-NITRATES, NITRITES

Initial Frequency by Source Type 1 6

Contaminant Type of water system Ground water only Surface only or Surface and ground water Accelerated Sampling
Nitrate Community and Noncommunity2 One sample per entry point per year One sample per entry point quarterly beginning 1/1/93 For Groundwater: If equal to or GT 50 percent MCL, quarterly for one year3

For Surface Water:
If LT 50 percent MCL, one sample per year3 4

Nitrite Community, NTNC and Noncommunity One sample per entry point by 12/31/95 One sample per entry point by 12/31/95 If equal to or GT 50 percent MCL, repeat quarterly for at least one year3 4

If LT 50 percent MCL, sample frequency at State discretion.5


GT - Greater Than      LT - Less than


Table 8C Footnote 1 The Department may require, or the water system may request, more frequent monitoring frequencies than is minimally required. The Department, at its discretion may require confirmation samples for positive and negative results.
Table 8C Footnote 2 Noncommunity water systems must sample annually beginning 1/1/93 regardless of the water source.
Table 8C Footnote 3 The frequency may be reduced to annual if the State determines the system's contaminant concentration is consistently and reliably less than the MCL and annual samples are collected during the quarter(s) having the highest analytical results.
Table 8C Footnote 4 A surface water shall return to quarterly monitoring if any one sample is GT 50 percent of MCL.
Table 8C Footnote 5 State discretion shall mean requiring monitoring when the State has reason to believe the MCL has been violated, the potential exists for an MCL violation or the contaminant may present a risk to public health.

Last sentence added January 17, 2018.

Table 8C Footnote 6 For both types of water sources the system shall take each sample at the same sampling point unless conditions make another sampling point more representative of each source or treatment plant. If a system draws water from more than one source and the sources are combined before distribution, the system must sample at an entry point to the distribution system during periods of normal operating conditions when water is representative of all sources. The average of the initial and confirmation sample contaminant concentration at each sampling point shall be used to determine compliance with the MCL.


TABLE 8D-INORGANIC CHEMICALS AND PHYSICAL CHARACTERISTICS
MINIMUM MONITORING REQUIREMENTS-OTHER CHEMICALS

Initial Frequency by and Compliance Source Type

Contaminant Type of water system Ground water only Surface only or Surface and ground water Repeat Sampling
Chloride
Iron
Manganese
Silver
Sodium1
Sulfate
Zinc
Color
Odor
Go to MCLs
Community and NTNC State discretion2 State discretion2 State discretion2

Table 8D Footnote 1 All community systems with sodium levels exceeding 20 mg/l will be required to sample for sodium analysis.
Table 8D Footnote 2 State discretion shall mean requiring monitoring when the State has reason to believe the MCL has been violated, the potential exists for an MCL violation or the contaminant may present a risk to public health.

Effective Date: January 17, 2018

TABLE 9A-ORGANIC CHEMICALS-Disinfection Byproducts
Minimum Monitoring Requirements

Routine MonitoringReduced Monitoring2
Source Water TypePopulation SizeDistribution System monitoring location per monitoring period3Frequency4Distribution System monitoring locations per monitoring periodFrequency
Total Trihalomethanes (TTHM)

Haloacetic Acids (HAA5)
Surface water and GWUDI<5002 5per year 6 not allowednot allowed
500 – 3,3002 5per quarter2 5per year 6
3,301 – 9,9992per quarter2 7per year 6
10,000 – 49,9994per quarter2 8per quarter
50,000 – 249,9998per quarter4 9per quarter
250,000 – 999,99912per quarter6 10per quarter
1,000,000 – 4,999,99916per quarter8 11per quarter
≥5,000,00020per quarter10 12per quarter
Ground water<5002 5per year 62 5every third year 6
500 – 9,9992per year 2 5per year 6
10,000 – 99,9994per quarter2 7per year 6
100,000 – 499,9996per quarter2 8 per quarter
≥500,0008per quarter4 9 per quarter

Table 9A Footnote 1 To comply with monitoring requirements, certain conditions must be applied to test methods. The following apply to any samples collected for compliance with section 5-1.50(o) of this Subpart:
• Total Organic Carbon (TOC) samples. Inorganic carbon must be removed from TOC samples prior to analysis. TOC samples may not be filtered prior to analysis. TOC samples must be acidified at the time of sample collection to achieve pH less than or equal to 2 with minimal addition of the acid specified in the method or by the instrument manufacturer. Acidified TOC samples must be analyzed within 28 days.
• SUVA Samples:

For Specific Ultraviolet Absorbance (SUVA) samples, SUVA must be determined on water prior to the addition of disinfectants/oxidants by the system. Dissolved Organic Carbon (DOC) and Ultraviolet Absorption at 254 nm (UV254) samples used to determine a SUVA value must be taken at the same time and at the same location.

DOC samples must be filtered through the 0.45 µm pore-diameter filter as soon as practical after sampling, not to exceed 48 hours. After filtration, DOC samples must be acidified to achieve pH less than or equal to 2 with minimal addition of the acid specified in the method or by the instrument manufacturer. Acidified DOC samples must be analyzed within 28 days of sample collection. Inorganic carbon must be removed from the samples prior to analysis. Water passed through the filter prior to filtration of the sample must serve as the filtered blank. This filtered blank must be analyzed using procedures identical to those used for analysis of the samples and must meet the following criteria: DOC < 0.5 mg/L.

For UV254 samples, UV absorption must be measured at 253.7 nm (may be rounded off to 254 nm). Prior to analysis, UV254 samples must be filtered through a 0.45 µm pore-diameter filter. The pH of UV254 samples may not be adjusted. Samples must be analyzed as soon as practical after sampling, not to exceed 48 hours.

Table 9A Footnote 2 Systems may reduce monitoring if, at all monitoring locations, the TTHM LRAA is ≤0.040 mg/L and the HAA5 LRAA is ≤0.030 mg/L. In addition, the source water annual average TOC level, before any treatment, shall be ≤4.0 mg/L at each treatment plant treating surface water or GWUDI. A system with quarterly reduced monitoring may remain on reduced monitoring as long as the TTHM LRAA is ≤0.040 mg/L and the HAA5 LRAA is ≤0.030 mg/L at each monitoring location. For systems with annual or less frequent monitoring, each TTHM sample shall be ≤0.060 mg/L and each HAA5 sample shall be ≤0.045 mg/L. In addition, the source water annual average TOC level, before any treatment, shall be ≤4.0 mg/L at each treatment plant treating surface water or GWUDI. If these conditions are not met, or at the State’s discretion, the system shall resume routine monitoring in the quarter immediately following the exceedance (for quarterly systems) or in the year immediately following the exceedance (for systems that monitor annually or less frequently).
Table 9A Footnote 3 A system shall monitor according to its monitoring plan as described in section 5-1.51(c) of this Subpart. Failure to monitor in accordance with the monitoring plan is a monitoring violation. All systems shall monitor during the month of highest Disinfection Byproducts concentrations. Monitoring shall be increased to quarterly at all locations if a TTHM sample is > 0.080 mg/L or a HAA5 sample is > 0.060 mg/L.
Table 9A Footnote 4 Systems on quarterly monitoring shall take dual sample sets every 90 days at each monitoring location, except for surface water and GWUDI systems serving a population of 500 – 3,300. Ground water systems serving a population of 500 – 9,999 on annual monitoring shall take dual sample sets at each monitoring location. All other systems on annual monitoring and surface water and GWUDI systems serving a population of 500 – 3,300 are required to take individual TTHM and HAA5 samples (instead of dual sample set) at the locations with the highest TTHM and HAA5 concentrations, respectively. For systems serving fewer than 500 people, only one location with a dual sample set per monitoring period is needed if the highest TTHM and HAA5 concentrations occur at the same location and month.
Table 9A Footnote 5 Collect one TTHM sample at the location and during the quarter with the highest TTHM single measurement, and one HAA5 sample at the location and during the quarter with the highest HAA5 single measurement; alternatively, collect one dual sample set per year if the highest TTHM and HAA5 measurements occurred at the same location and quarter.
Table 9A Footnote 6 If a system is required to monitor a particular location annually or less frequently, and a TTHM sample is >0.080 mg/L or a HAA5 sample is >0.060 mg/L at any location, the system shall increase monitoring to dual sample sets once per quarter (taken every 90 days) at all locations. The system may return to routine monitoring if at least four consecutive quarters of increased monitoring have been conducted and for every monitoring location the TTHM LRAA ≤0.060 mg/L and the HAA5 LRAA is ≤0.045 mg/L.
Table 9A Footnote 7 Collect one dual sample set at the location and during the quarter of the highest TTHM single measurement, and one dual sample set at the location and during the quarter of the highest HAA5 single measurement.
Table 9A Footnote 8 Collect dual sample sets at the locations with the highest TTHM and HAA5 LRAAs.
Table 9A Footnote 9 Collect dual sample sets at the locations with the two highest TTHM and two highest HAA5 LRAAs.
Table 9A Footnote 10 Collect dual sample sets at the locations with the three highest TTHM and three highest HAA5 LRAAs.
Table 9A Footnote 11 Collect dual sample sets at the locations with the four highest TTHM and four highest HAA5 LRAAs.

Footnote 11 in 2020-10-07 PDF (https://www.health.ny.gov/regulations/nycrr/title_10/part_5/docs/subpart_5-1_tables.pdf) web version has three instead of four.


Table 9A Footnote 12 Collect dual sample sets at the locations with the five highest TTHM and five highest HAA5 LRAAs.

Effective Date: December 24, 2003. Initial requirement dates removed and Footnotes renumbered January 17, 2018.

TABLE 9B-Organic Chemicals-POCs, Vinyl Chloride, Methyl-tertiary-butyl-ether (MTBE), UOCs, Propylene Glycol
Minimum Monitoring Requirements

Contaminant Type of Water System Initial requirement1 Continuing requirement where detected 1 Continuing requirement where not detected and vulnerable to contamination1 Continuing requirement where not detected and invulnerable to contamination1
Principal Organic Contaminants listed on TABLE 9D and Vinyl chloride and Methyl-tertiary-butyl-ether (MTBE)2 Community and Nontransient Noncommunity serving 3300 or more persons Quarterly sample per source for one year.3 Quarterly4 Annually5 Once every six years6 for ground water sources. State discretion7 for surface water sources.
Community and Nontransient Noncommunity serving fewer than 3300 persons Quarterly sample per source for one year.3 Quarterly4 Annually5 Once every six years6 for ground water sources. State discretion7 for surface water sources.
Noncommunity excluding NTNC State discretion7 State discretion7 State discretion7 State discretion7
Unspecified Organic Contaminants and other POCs not listed on TABLE 9C or 9D and Propylene Glycol Community and Noncommunity State discretion7 State discretion7 State discretion7 State discretion7

Table 9B Footnote 1 The location for sampling of each ground water source of supply shall be between the individual well and at or before the first service connection and before mixing with other sources, unless otherwise specified by the State to be at the entry point representative of the individual well. Public water systems which rely on a surface water shall sample at points in the distribution system representative of each source or at an entry point or points to the distribution system after any water treatment plant.
Table 9B Footnote 2 The initial requirement does not apply to MTBE monitoring.
Table 9B Footnote 3 The State may reduce the initial monitoring requirement to one sample if the State determines that the system is invulnerable in accordance with footnote 4.
Table 9B Footnote 4 The State may decrease the quarterly monitoring requirement to annually provided that the system is reliably and consistently below the MCL based on a minimum of two quarterly samples from a ground water source and four quarterly samples from a surface water source. Systems which monitor annually must monitor during the quarter which previously yielded the highest analytical result.
Table 9B Footnote 5 The State may reduce the frequency of monitoring of a ground water source to once every three years for a public water system which has three consecutive annual samples with no detection of a contaminant.
Table 9B Footnote 6 The State may determine that a public water system is invulnerable to a contaminant or contaminants after evaluating every three years the following factors:

(a) Knowledge of previous use (including transport, storage, or disposal) of the contaminant within the watershed or zone of influence of the system. If a determination by the State reveals no previous use of the contaminant within the watershed or zone of influence, a waiver can be granted.

(b) If previous use of the contaminant is unknown or it has been used previously, then the following factors shall be used to determine whether a waiver can be granted.

1. Previous analytical results.

2. The proximity of the system to a potential point or nonpoint source of contamination. Point sources include spills and leaks of chemicals at or near a water treatment facility or at manufacturing, distribution, or storage facilities, or from hazardous and municipal waste landfills and other waste handling or treatment facilities.

3. The environmental persistence and transport of the contaminants.

4. The number of persons served by the public water system and the proximity of a smaller system to a larger system.

5. How well the water source is protected against contamination, such as whether it is a surface or groundwater system. Groundwater systems must consider factors such as depth of the well, the type of soil, and wellhead protection. Surface water systems must consider watershed protection.


Table 9B Footnote 7 State discretion shall mean requiring monitoring when the State has reason to believe the MCL has been violated, the potential exists for an MCL violation or the contaminant may present a risk to public health.

Effective Date: August 26, 2020

TABLE 9C. Additional Organic Chemicals - Minimum Monitoring Requirements

Contaminant [To MCLs] Type of Water System Initial requirement 1 Continuing requirement where detected 1 2 3 4 Continuing requirement where not detected 1
Alachlor
Aldicarb sulfone
Aldicarb sulfoxide
Aldicarb
Aldrin
Atrazine
Benzo(a)pyrene
Butachlor
Carbaryl
Dalapon
Carbofuran
Chlordane
Di(2-ethylhexyl)-adipate
Di(2-ethylhexyl)-phthalate
Dibromochloropropane
Dicamba
2,4-D
Dieldrin
Dinoseb
1,4 Dioxane
Diquat
Endothall
Endrin
Ethylene dibromide
Glyphosate
Heptachlor epoxide
Heptachlor
Hexachlorobenzene
Hexachlorocyclopentadiene
3-Hydroxycarbofuran
Lindane
Methomyl
Methoxychlor
Metolachlor
Metribuzin
Oxamyl (Vydate)
Pentachlorophenol
Perfluorooctanesulfonic acid (PFOS)
Perfluorooctanonic acid (PFOA)
Pichloram
Polychlorinated biphenyls
Propachlor
Simazine
2,5,7,8-TCDD (Dioxin) 2,4,5-TP (Silvex) Toxaphene
Community and Non-transient Noncommunity serving 3300 or more persons3 Quarterly sample per source, for one year5 Quarterly One sample every eighteen months per source 6 7 8
Community and Nontransient noncommunity serving fewer than 3300 persons and more than 149 service connections Quarterly samples per entry point, for one year 6 7 8 Quarterly Once per entry point every three years 6 7 8
Community and Nontransient Noncommunity serving fewer than 3300 persons and fewer than 150 service connections Quarterly samples per entry point for one year 6 7 8 Quarterly Once per entry point every three years 6 7 8
Noncommunity excluding NTNC State discretion9 State discretion9 State discretion9

See SOCs - repeats and MCLs email 2021-04-14 and SOC repeat samples email 2021-01-13 about resampling and footnote mistakes. *Need summary here*


Table 9C Footnote 1 The location for sampling of each ground water source of supply shall be between the individual well and at or before the first service connection and before mixing with other sources, unless otherwise specified by the State to be at the entry point representative of the individual well. Public water systems which take water from a surface water body or watercourse shall sample at points in the distribution system representative of each source or at entry point or points to the distribution system after any water treatment plant.
Table 9C Footnote 2 The State may decrease the quarterly monitoring requirement to annually provided that system is reliably and consistently below the MCL based on a minimum of two quarterly samples from a ground water source and four quarterly samples from a surface water source. Systems which monitor annually must monitor during the quarter that previously yielded the highest analytical result. Systems serving fewer than 3,300 persons and which have three consecutive annual samples without detection may apply to the State for a waiver in accordance with footnote 6.
Table 9C Footnote 3 If a contaminant is detected, repeat analysis must include all analytes contained in the approved analytical method for the detected contaminant.
Table 9C Footnote 4 Detected as used in the table shall be defined as reported by the State approved laboratory to be greater than or equal to the method detection limit.
Table 9C Footnote 5 The State may allow a system to postpone monitoring for a maximum of two years, if an approved laboratory is not reasonably available to do a required analysis within the scheduled monitoring period.
Table 9C Footnote 6 The State may waive the monitoring requirement for a public water system that submits information every three years to demonstrate that a contaminant or contaminants was not used, transported, stored or disposed within the watershed or zone of influence of the system.
Table 9C Footnote 7 The State may reduce the monitoring requirement for a public water system that submits information every three years to demonstrate that the public water system is invulnerable to contamination. If previous use of the contaminant is unknown or it has been used previously, then the following factors shall be used to determine whether a waiver is granted.
a. Previous analytical results.
b. The proximity of the system to a potential point or nonpoint source of contamination. Point sources include spills and leaks of chemicals at or near a water treatment facility or at manufacturing, distribution, or storage facilities, or from hazardous and municipal waste landfills and other waste handling or treatment facilities. Nonpoint sources include the use of pesticides to control insect and weed pests on agricultural areas, forest lands, home and gardens, and other land application uses.
c. The environmental persistence and transport of the pesticide or PCBs.
d. How well the water source is protected against contamination due to such factors as depth of the well and the type of soil and the integrity of the well casing.
e. Elevated nitrate levels at the water supply source.
f. Use of PCBs in equipment used in production, storage or distribution of water.
Table 9C Footnote 8 The State may allow systems to composite samples in accordance with the conditions in Appendix 5-C of this Title.
Table 9C Footnote 9 State discretion shall mean requiring monitoring when the State has reason to believe the MCL has been violated, the potential exists for an MCL violation or the contaminant may present a risk to public health.

Effective Date: December 24, 2003

TABLE 9D-ORGANIC CHEMICALS-POCs
MONITORING REQUIREMENTS

Chlorobenzene's footnote was removed in the 2018 version
1,2,3-trichlorobenzene footnote shows on 1,2,4-trichlorobenzene in the 2018 version
These could be mistakes or corrections. Don't know when the change was made. Have to check previous pdf versions. There is no notice of change in the official changes.
40CFR141.205 requires MHEL. Appendix A and B of Subpart Q include chlorobenzene and 1,2,4-trichlorobenzene but not 1,2,3-trichlorobenzene, so the footnotes here reflect that.
NYSDOH released MHEL for 1,2,3-trichlorobenzene, June 1992, so the footnote should apply to 1,2,3-trichlorobenzene, too.

ContaminantSpecific Contaminants for Analysis
POCs benzene1
bromobenzene
bromochloromethane
bromomethane
n-butylbenzene
sec-butylbenzene
tert-butylbenzene
carbon tetrachloride1
chlorobenzene1
chloroethane
chloromethane
2-chlorotoluene
4-chlorotoluene
dibromomethane
1,2-dichlorobenzene1
1,3-dichlorobenzene
1,4-dichlorobenzene1
dichlorodifluoromethane
1,1-dichloroethane
1,2-dichloroethane1
1,1-dichloroethene1
cis-1,2-dichloroethene1
trans-1,2-dichloroethene1
1,2-dichloropropane1
1,3-dichloropropane
2,2-dichloropropane
1,1-dichloropropene

cis-1,3-dichloropropene
trans-1,3-dichloropropene
ethylbenzene1
hexachlorobutadiene
isopropylbenzene
p-isopropyltoluene
methylene chloride1
n-propylbenzene
styrene1
1,1,1,2-tetrachloroethane
1,1,2,2-tetrachloroethane
tetrachloroethene1
toluene1
1,2,3-trichlorobenzene1
1,2,4-trichlorobenzene1
1,1,1-trichloroethane1
1,1,2-trichloroethane1
trichloroethene1
trichlorofluoromethane
1,2,3-trichloropropane
1,2,4-trimethylbenzene
1,3,5-trimethylbenzene
m-xylene1
o-xylene1
p-xylene1

Table 9D Footnote 1 Notification must contain mandatory health effect language.

2003? check old versions.

TABLE 10-TURBIDITY
MINIMUM MONITORING REQUIREMENTS1

Contaminant Type of water system Source type
Ground water only Surface only, Surface and ground water or groundwater directly influenced by surface water.
Entry point turbidity Community State discretion2 Collect and analyze one sample per day from each entry point. All results must be recorded to two significant figures.
Noncommunity State discretion2 Collect and analyze one sample annually. Monitoring requirement may be increased at State discretion.2
Distribution system turbidity Community State discretion2 Five samples each week distribution unless otherwise determined by the State. No two samples may be obtained on the same day and no two samples are to be collected from the same distribution point during the week.
Noncommunity State discretion2 State discretion2

Table 10 Footnote 1 The requirements of this table apply to unfiltered systems that the State has determined, in writing pursuant to section 5-1.30 of this Subpart, must install filtration. These requirements only apply until filtration is installed.
Table 10 Footnote 2 State discretion shall mean requiring monitoring when the State has reason to believe the MCL has been violated, the potential exists for an MCL violation or the contaminant may present a risk to public health.

Effective Date: May 26, 2004. Unchanged in 2018-05-16 version

TABLE 10A-TURBIDITY
MINIMUM MONITORING REQUIREMENTS

Contaminant Type of water system Source type
Ground water Surface water1
Filtered water turbidity Community and Noncommunity Not applicable Continuous monitoring for composite filter effluent and individual filters.2,3,4,5,
Raw water turbidity Unfiltered surface:
Community and Noncommunity
Not applicable Every four hours or continuous monitoring5
Distribution point turbidity Community State discretion6 Five distribution samples each week unless otherwise determined by the State. No two samples are to be collected from the same distribution point during the same week.
Noncommunity State discretion6 State discretion6

Table 10A Footnote 1 Surface water sources or groundwater sources directly influenced by surface water.
Table 10A Footnote 2 Effective January 1, 2002 systems serving 10,000 or more people must record the results of individual filter monitoring every fifteen minutes, and combined filter effluent every four hours. Effective January 14, 2005 systems serving fewer than 10,000 persons must record the results of individual filter monitoring every fifteen minutes, and combined filter effluent every four hours. Until January 14, 2005, systems serving fewer than 10,000 persons must continuously monitor the composite filter effluent turbidity, or record the turbidity every four hours. The state may allow systems with two filters to monitor the combined filter effluent continuously (recording every 15 minutes) in lieu of monitoring individual filter turbidity. Results of individual filter monitoring must be maintained for at least three years.
Table 10A Footnote 3 If there is a failure in the continuous turbidity monitoring equipment, the system must conduct grab sampling every four hours instead of continuous monitoring, but for no more than five working days following the failure of the equipment.
Table 10A Footnote 4 For systems using slow sand filtration or filtration treatment, other than conventional treatment, direct filtration or D.E. filtration, the State may reduce sampling frequency to once per day if it determines that less frequent monitoring is sufficient to indicate effective filtration performance.
Table 10A Footnote 5 If a system uses continuous monitoring, it must use the turbidity values recorded every four hours to determine if a treatment technique violation occurs, unless the State has approved in writing a different time interval.
Table 10A Footnote 6 State discretion shall mean requiring monitoring when the State has reason to believe the MCL has been violated, the potential exists for an MCL violation or the contaminant may present a risk to public health.

Effective Date: May 16, 2018

TABLE 11-Microbiological Minimum Monitoring Requirements (Refer to Table 11B following any positive samples) 1 2 3 4

ContaminantType of Water system Number of samples based on population
Population Served Minimum number of samples per month4Population ServedMinimum number of samples per month4
Total coliform in distribution system5 Community Up to 1,0006 1 59,001 to 70,000 70
1,001 to 2,500 2 70,001 to 83,000 80
2,501 to 3,300 3 83,001 to 96,000 90
3,301 to 4,100 4 96,001 to 130,000 100
4,101 to 4,900 5 130,001 to 220,000 120
4,901 to 5,800 6 220,001 to 320,000 150
5,801 to 6,700 7 320,001 to 450,000 180
6,701 to 7,600 8 450,001 to 600,000 210
7,601 to 8,500 9 600,001 to 780,000 240
8,501 to 12,900 10 780,001 to 970,000 270
12,901 to 17,200 15 970,001 to 1,230,000 300
17,201 to 21,500 20 1,230,001 to 1,520,000 330
21,501 to 25,000 25 1,520,001 to 1,850,000 360
25,001 to 33,000 30 1,850,001 to 2,270,000 390
33,001 to 41,000 40 2,270,001 to 3,020,000 420
41,001 to 50,000 50 3,020,001 to 3,960,000 450
50,001 to 59,000 60 3,960,001 or more 480
Noncommunity using surface water or ground water directly influenced by surface water All Same as Community
Noncommunity using only ground water not directly influenced by surface water ≤ 1,000

> 1,000

Quarterly8,9

Same as Community

SeasonalAllMonthly9
Escherichia coli (E. coli) Community and Noncommunity All Any routine or repeat samples that are coliform positive must be analyzed for E. coli.4,10
Fecal Indicator in Raw Source Water10All ground water systems unless providing 4-log virus treatment and process compliance monitoringAllState discretion11

Table 11 Footnote 1 Public water systems must collect total coliform samples at sites which are representative of water throughout the distribution system and throughout the reporting period according to a written monitoring plan which is subject of State review and revision as described in subdivision 5-1.51(c) of this Subpart.
Table 11 Footnote 2 Public water systems using surface water or groundwater directly influenced by surface water, and which do not provide filtration, must collect and analyze at least one sample for total coliforms near the first service connection each day the turbidity level of the raw water exceeds 1.49 NTU. This sample shall be collected within 24 hours. Results of this sample must be included in determining compliance with the Maximum Contaminant Level (MCL) of total coliforms in Table 6 of this section.
Table 11 Footnote 3 Samples taken to determine disinfection practices after pipe repair, replacement, etc. are not to be used for determining MCL compliance for total coliforms in Table 6 of this section.
Table 11 Footnote 4 See Table 11B for repeat sampling requirements following any total coliform or E. coli positive samples.
Table 11 Footnote 5 If chlorine or chloramines are used as the disinfectant, a chlorine residual determination shall be made at the same time and location that the sample is collected for total coliform analysis. Monitoring for heterotrophic bacteria may be substituted for free chlorine residuals. A heterotrophic plate count result equal to or less than 500 colonies per milliliter is considered to be equivalent to a measurable free chlorine residual.
Table 11 Footnote 6 The State may, in writing, reduce the monitoring frequency to quarterly for a community water system serving 1,000 or fewer persons and using ground water only if the system is in compliance with 10 NYCRR Subpart 5-4; has a clean compliance history for a minimum of 12-months; is free of sanitary defects; and has a protected water source. The system must meet at least one of the following criteria: an annual site visit by the State or State-approved party that is equivalent to a Level 2 assessment and correction of all identified sanitary defects; cross connection control, as approved by the State; continuous disinfection entering the distribution system and a residual in the distribution system in accordance with criteria specified by the State; or demonstration of maintenance of at least a 4-log removal or inactivation of viruses. Systems that have been granted a disinfection waiver are not eligible for reduced monitoring frequency.
Table 11 Footnote 7 A community water system on quarterly monitoring must begin monthly monitoring if it meets any of the following conditions: a Level 2 assessment is triggered; two Level 1 assessments in a rolling 12-month period are triggered; an E. coli MCL violation; a coliform TTV; or two total coliform monitoring violations in a rolling 12-month period. Monthly monitoring must begin in the month following the event.
Table 11 Footnote 8 A noncommunity water system on quarterly monitoring must begin monthly monitoring if it meets any of the following conditions: a Level 2 assessment is triggered; two Level 1 assessments in a rolling 12-month period are triggered; an E. coli MCL violation; a coliform TTV; two total coliform monitoring violations; or one total coliform monitoring violation and one Level 1 assessment in a rolling 12-month period. Monthly monitoring must begin in the month following the event.
Table 11 Footnote 9 A noncommunity water system may return to quarterly monitoring if they meet the following criteria: within the last 12 months, the system must have a completed sanitary survey or Level 2 assessment, be free of sanitary defects, have a protected water source; and the system must have a clean compliance history for a minimum of 12 months.
Table 11 Footnote 10 Fecal indicators include E. coli, enterococci, and coliphage. Only E. coli testing will be required, unless otherwise directed by the State.
Table 11 Footnote 11 State discretion shall mean that monitoring is required when the State has reason to believe the MCL or TT has been violated, the potential exists for an MCL or TTT; or the contaminant may present a risk to public health.

Effective Date: May 26, 2004. Unchanged in 2018-05-16 version

TABLE 11A-MICROBIOLOGICAL/FILTRATION AVOIDANCE CRITERIA
MINIMUM MONITORING REQUIREMENTS1

Contaminant2 Type of water system Population served Minimum number of samples per week 3 4
Raw water fecal or total coliform Community and Noncommunity Up to 500
501 to 3,300
3,301 to 10,000
10,001 to 25,000
25,001 or more
1
2
3
4
5

Table 11A Footnote 1 The monitoring requirement applies to surface water sources and ground water sources directly influenced by surface water.
Table 11A Footnote 2 Either fecal or total coliform density measurements are acceptable. If both analyses are performed, the fecal coliform results will take precedence.
Table 11A Footnote 3 Monitoring sampling must be performed on separate days.
Table 11A Footnote 4 Samples must be taken and analyzed every day the system serves water to the public and the turbidity of the raw water exceeds 1.49 NTU. The samples count toward the weekly sampling requirement.

Effective Date: May 16, 2018

TABLE 11B-Repeat Microbiological Sampling Requirements following Total Coliform Positive and/or Fecal Indicator Positive Sample(s)1

Type of Positive Sample Type of Water System/Source System Size Number of Repeat Samples Required within 24 hours of notification Sampling Location Required action for positive repeat samples
Routine total coliform sample(s) from distribution system Surface water, GWUDI, or ground water performing 4-log virus treatment and process compliance monitoring More than one service connection Three distribution system samples The same sampling site where the original coliform-positive sample was collected, one sample within five service connections upstream, one sample within five service connections downstream in accordance with a state approved sampling plan. Distribution sampling must be repeated until total coliform is not detected in repeat samples, or it is determined that a treatment technique has been triggered, or it an MCL has been violated.2,3
One service connection One distribution system sample4 Original sampling location
Ground water system or ground water source not providing (or not documenting) 4-log virus treatment5 Population >1,000 Three distribution system samples and one source water sample from each source collected in accordance with a State-approved sampling plan6 The same distribution system sampling site where the original coliform-positive sample was collected, one sample within five service connections upstream, one sample within five service connections downstream. An additional sample must be collected from each raw water source or according to State approved sampling plan.6,7
Population ≤1,000 and more than one service connection Three distribution system samples and one source water sample from each source collected in accordance with a State-approved sampling plan5,8 The same distribution system sampling site where the original coliform-positive sample was collected, one sample within five service connections upstream, and one sample within five service connections downstream. An additional sample must be collected from each raw water source or according to State approved sampling plan.6,7,8
One service connection One distribution system sample and source water sample(s) in accordance with a State-approved sampling plan4,6,8 Original sampling location. An additional sample must be collected from each raw water source or according to State approved sampling plan.6,7,8
Wholesale System of any size After notification by consecutive system of total coliform-positive sample6,7,9,11 Collect one raw water sample at each source or in accordance with a State-approved sampling plan.6,7,9 As directed by State10
Source water sample(s) fecal indicator positive7,10 Ground water system or ground water source not providing or not documenting 4-log virus treatment All Five raw water samples for fecal indicator or immediate corrective action as directed by State6,9,11 Fecal indicator sampling from source or sources with initial fecal indicator positive samples6,7 As directed by State10,11

Table 11B Footnote 1 After any total coliform positive sample from the distribution system, the system must collect repeat samples on the same day and within 24 hours of being notified.
Table 11B Footnote 2 The month following a total coliform positive sample, systems collecting samples quarterly must collect a minimum of three routine distribution system samples. The State may waive, in writing, the requirement to collect three routine samples the following month the system provides water to the public, if the State carries out an onsite visit before the end of the following month and the State determines why the sample was total coliform positive and establishes that the system has corrected the problem. The State cannot waive the requirement to collect three routine samples solely on the basis that all the repeat samples were total coliform negative. Before the end of the following month the system serves water to the public, at least one routine sample to determine compliance with the MCLs and TTTs must be collected by the system as required in Table 11.
Table 11B Footnote 3 Results of all routine and repeat microbiological samples not invalidated by the State must be used to determine whether a coliform TTT specified in Table 6 has been exceeded.
Table 11B Footnote 4 The State may allow a system with a single service connection to collect the required set of repeat samples over a three-day period or to collect a larger volume repeat sample(s) in one or two more sample containers of any size, as long as the total volume collect is at least 300 mL. If E. coli is used as the fecal indicator at a ground water system with a single well, a single sample of two (2) times the minimum sample volume or two (2) bottles of minimum required sample volume may be collected consecutively from the tap and the third sample collected from the raw water source. This source water sample result must be used to determine compliance with all Table 6 requirements. [editor's note: Don't do this. Take the extra sample. If you use the raw sample for TCR compliance a bad raw sample would also trigger TCR compliance work.
Table 11B Footnote 5 If a consecutive system purchasing (or otherwise obtaining) ground water from a wholesale system has a total coliform-positive sample from the distribution system, the system must notify the wholesale system and collect distribution system repeat samples as specified in Table 11B within 24 hours. The wholesale system must collect raw source water sample(s) unless the system provides 4-log virus treatment at peak flow before or at the first customer as confirmed through process compliance monitoring.
Table 11B Footnote 6 Sampling plan requirements are given in subdivision 5-1.51 (c) of this Subpart.
Table 11B Footnote 7 Fecal indicators include E. coli, enterococci and coliphage. Sampling for fecal indicators other than E.coli is at State discretion.
Table 11B Footnote 8 A system with a single well or a ground water source serving 1,000 or fewer persons may collect a single raw water sample to serve as both a distribution repeat sample to replace the upstream location sample and a raw water sample taken following a routine total coliform positive sample, if E. coli is used as the fecal indicator. If this dual-purpose source water sample is collected, the sample result must be used to determine compliance with all Table 6 requirements.
Table 11B Footnote 9 Wholesale system source water sampling requirements are in addition to distribution system sampling requirements for consecutive systems.
Table 11B Footnote 10 In the event of a fecal indicator positive sample from the raw source water, the state must be notified immediately and may require immediate corrective action. In no case will notification be later than 24 hours as described in paragraph 5-1.78(d)(4) of this Subpart.
Table 11B Footnote 11 If a ground water wholesale system does not perform 4-log virus treatment and process compliance monitoring, and has a fecal indicator positive sample from a raw source water, the system must notify any consecutive systems as well as any of its own customers.

Effective Date: December 21, 2005

TABLE 12-RADIOLOGICAL
MINIMUM MONITORING REQUIREMENTS

ContaminantType of water systemMonitoring Requirement1
InitialReduced monitoring2,3
Combined Ra-226 and Ra-228, uranium and gross alpha particle activity CommunityFour consecutive quarterly samples at every entry point before December 31, 2007.4,5,6One sample every nine years at every entry point when monitoring results are below the detection limit.7,8

One sample every six years at every entry point when monitoring results are at or above the detection limit but below half of the MCL.7,8

One sample every three years at every entry point when monitoring results are above half of the MCL but at or below the MCL.7,8

Beta particle and photon radioactivity from manmade radionuclides Community systems designated by the State as vulnerable9 Quarterly samples for beta particle and annual samples for tritium and Sr-90, beginning within one quarter after being notified by the State.10,11 If the gross beta particle activity minus the naturally occurring K-40 beta particle activity at a sampling point has a running annual average (computed quarterly) less than or equal to 50 pCi/L (screening level), the State may reduce the frequency of monitoring at that sampling point to once every 3 years.14,15
Community systems designated by the State as utilizing waters contaminated by effluents from nuclear facilities9 Quarterly samples for beta emitters and I-131 and annual samples for tritium and Sr-90, beginning within one quarter after being notified by the State.10,11,12,13 If the gross beta particle activity minus the naturally occurring K-40 beta particle activity at a sampling point has a running annual average (computed quarterly) less than or equal to 15 pCi/L (screening level), the State may reduce the frequency of monitoring at that sampling point to once every 3 years.14,15

Table 12 Footnote 1 All radiological samples must be collected at every entry point to distribution system (EPTDS).
Table 12 Footnote 2 The State may allow systems to reduce the frequency of monitoring based on initial monitoring or historical results as noted in footnote 4 below.
Table 12 Footnote 3 Systems on a reduced monitoring schedule must perform quarterly sampling if a sample result exceeds the MCL.
Table 12 Footnote 4 The State may allow historical monitoring data collected between June 2000 and December 8, 2003 for systems with:
(1) only one entry point to the distribution system;
(2) multiple entry points and having appropriate historical monitoring data for each entry point to the distribution system;
(3) appropriate historical data for a representative point in the distribution system, provided that the State finds that the historical data satisfactorily demonstrate that each entry point to the distribution system is expected to be in compliance based upon the historical data and reasonable assumptions about the variability of contaminant levels between entry points.
Table 12 Footnote 5 The State may waive the final two quarters of initial monitoring for a sampling point if the results of the samples from the previous two quarters are below the detection limit as described in the Appendix 5-C.
Table 12 Footnote 6 If the average of the initial monitoring results for a sampling point is above the MCL, the system must collect and analyze quarterly samples at the sampling point until the system has results from four consecutive quarters that are at or below the MCL.
Table 12 Footnote 7 A gross alpha particle activity measurement may be substituted for the required radium-226 measurement provided that the measured gross alpha particle activity does not exceed 5 pCi/l. A gross alpha particle activity measurement may be substituted for the required uranium measurement provided that the measured gross alpha particle activity does not exceed 15 pCi/l. The gross alpha measurement shall have a confidence interval of 95 % (1.65σ, where σ is the standard deviation of the net counting rate of the sample) for radium-226 and uranium. When a system uses a gross alpha particle activity measurement in lieu of a radium-226 and/or uranium measurement, the gross alpha particle activity analytical result will be used to determine the future monitoring frequency for radium-226 and/or uranium. If the gross alpha particle activity result is less than detection, ½ the detection limit can be used to substitute to radium-226 and determine compliance for future monitoring frequency.
Table 12 Footnote 8 Radium-228 measurement can not be substituted by the gross alpha particle activity result.
Table 12 Footnote 9 For systems in the vicinity of a nuclear facility, the State may allow the CWS to utilize environmental surveillance data collected by the nuclear facility in lieu of monitoring the systems entry point(s), where the State determines that such data is applicable.
Table 12 Footnote 10 Systems already designated by the State must continue to sample until the State reviews and either reaffirms or removes the designation.
Table 12 Footnote 11 Quarterly monitoring for gross beta particle activity shall be based on the analysis of monthly samples or the analysis of a composite of three monthly samples.
Table 12 Footnote 12 Annual monitoring for Sr-90 and tritium shall be conducted by means of the analysis of a composite of four consecutive quarterly samples or analysis of four quarterly samples.
Table 12 Footnote 13 For iodine-131, a composite of five consecutive daily samples shall be analyzed once each quarter. As ordered by the State, more frequent monitoring shall be conducted when iodine-131 is identified in the finished water.
Table 12 Footnote 14 Systems must collect all samples for beta emitters, tritium and strontium-90 during the reduced monitoring period.
Table 12 Footnote 15 A system that exceeds the gross beta particle activity minus the naturally occurring potassium-40 beta particle screening level (50 pCi/L for vulnerable systems or 15 pCi/L for systems utilizing waters contaminated by effluents from nuclear facilities), must further analyze the sample for the major radioactive constituents. The potassium-40 beta particle activity must be calculated by multiplying elemental potassium concentrations in mg/L by a factor of 0.82.

Effective Date: August 26, 2020

TABLE 13-REQUIRED NOTIFICATIONS

Contaminant/Situation(Subpart 5-1 citations)Single sample exceeds MCL/MRDL1MCL/MRDL/TT1 violationFailure to meet monitoring requirements and/or failure to use applicable testing procedure
Public Health Hazard
(section 5-1.1(bz))2
Not applicableState
Tier 1
State
Tier 1

Escherichia coli (E. coli) in distribution system

(section 5-1.52 tables 6, 11 and 11B)

3State
Not applicable, or 4Tier 1
State
Tier 1
State
Tier 3, or 5Tier 1

E. Coli or other fecal indicator detected in ground water source at system not providing both 4-log virus treatment and process compliance monitoring (section 5-1.52 tables 6, 11 and 11B)

2,3,5,6Tier 16Tier 1State
2,5,7Tier 3, or Tier 1
Total Coliform

(section 5-1.52 tables 6, 11 and 11B)

Not applicable8State
9Tier 2, or Tier 1
State
2,5,7Tier 3, or Tier 2 as directed by State

Entry Point Turbidity
monthly average

(section 5-1.52 tables 4 and 10)

10StateState
Tier 2
State
Tier 3
Entry Point Turbidity
two day average

(section 5-1.52 tables 4 and 10)

StateState
11Tier 2, or Tier 1
State
Tier 3
Raw Water Turbidity

(section 5-1.30(d) and section 5-1.52 table 10A)

StateState
11Tier 2, or Tier 1
State
Tier 3
Filtered Water Turbidity

Single exceedance of the maximum allowable Turbidity level
(section 5-1.52 tables 4A and 10A)

StateState
11Tier 2, or Tier 1
State
Tier 3
Filtered Water Turbidity

Treatment Technique violation
(section 5-1.52 tables 4A and 10A)

Not applicableState
Tier 2
State
Tier 3
Distribution Point Turbidity
(section 5-1.52 tables 5, 10 and 10A)
Not applicableState
Tier 2
State
Tier 3
12,13Treatment Technique violations
other than turbidity (subdivisions 5-1.12, 5-1.30, 5-1.32, 5-1.81, and 5-1.83 and Subdivision 5-1.71(d))
Not applicableState
2,13Tier 2, or Tier 1
State
13Tier 3, or 12Tier 2
14Free chlorine residual less than 0.2 mg/L at the entry point
(subdivision 5-1.30(d))
Not applicableStateNot applicable
15Free chlorine residual less than required minimum for a ground water system or ground water source required to provide 4-log virus treatment (subdivision 5-1.30(a))Not applicableState
9Tier 2, or Tier 1
Tier 2
Inorganic chemicals and physical characteristics listed in Tables 8A and 8B
(section 5-1.52 tables 1, 8A, and 8B)
StateState
Tier 2
State
Tier 3
Chloride, iron, manganese, silver, sulfate, and zinc
(section 5-1.52 tables 1 and 8D)
Not applicableState
Tier 3
State
Tier 3
Sodium
(section 5-1.52 tables 1 and 8D)
State if the level exceeds 20 mg/LTier 2 if the level exceeds 270 mg/LTier 3

Nitrate, Nitrite, Total Nitrate and Nitrite

(section 5-1.52 tables 2 and 8C)

StateState
Tier 1
State
16Tier 1, or Tier 3
Lead and Copper

(sections 5-1.40 to 1.48)

Not applicableState
Tier 2
State
Tier 3
Organic Chemicals

(section 5-1.52 table 9C)

StateState
Tier 2
State
Tier 3

Principal Organic Contaminants
Unspecified Organic Contaminants

Total POCs and UOCs
(section 5-1.52 tables 3, 9B and 9D)

StateState
Tier 2
State
Tier 3
Radiological Contaminants

(section 5-1.52 tables 7 and 12)

StateState
Tier 2
State
Tier 3
Monitoring and Control of Disinfection Byproduct Precursors

(section 5-1.60 to 5-1.64)

Not applicableState
Tier 2
State
Tier 3

Disinfectant residuals
Chlorine and Chloramine
(section 5-1.52 tables 3A and 15A)

StateState
Tier 2
State
Tier 3

Disinfectant residual
Chlorine dioxide

At entry point
(section 5-1.52 tables 3A, 15 and 15A)

StateState
Tier 2
State
17Tier 3, or Tier 2

Disinfectant residual
Chlorine dioxide

In distribution system
(section 5-1.52 tables 3A, 15 and 15A)

StateState
18Tier 1
State
18Tier 1

Disinfection byproducts
Trihalomethanes
Haloacetic acids
(Tables 3 and 9A)
and
Bromate and Chlorite
(section 5-1.52 tables 1 and 8B)

Not applicableState
Tier 2
State
Tier 3
Acrylamide and Epichlorohydrin

(section 5-1.51(m))

Not applicableState
Tier 2
Not applicable
Operation under a variance, exemption or deferral (Sections 5-1.90 to 5-1.96 and section 5-1.51(p))Not applicableTier 3Not applicable
Violation of conditions of a variance, exemption or deferral (Sections 5-1.90 to 5-1.96 and section 5-1.51(p))Not applicableState
Tier 2
Not applicable
Disruption of water service of four hours or more
(section 5-1.23(b))
Not applicable19StateNot applicable

Table 13 Footnote 1 MCL-maximum contaminant level, MRDL-maximum residual disinfectant level, TT-treatment technique
Table 13 Footnote 2 Community systems must describe in their annual water supply statement (see section 5-1.72(e) and (f)) any Public Health Hazard that is determined to be a violation, and any uncorrected significant deficiency, and must indicate whether corrective action has been completed. This notice must be repeated every year until the annual report documents that corrective action has been completed in accordance with section 5-1.22 of this Subpart.
Table 13 Footnote 3 State notification must be made by the supplier of water within 24 hours of learning of an E. coli positive sample.
Table 13 Footnote 4 Public notification normally does not have to be issued for an E. coli positive sample prior to the results of the repeat samples. However, there may be situations where the State determines that a Tier 1 notification is necessary to protect the public health. The supplier of water must provide the Tier 1 notification no later than 24 hours after learning of the State's determination.
Table 13 Footnote 5 Failure to test for E. coli requires a Tier 1 notification if testing is not performed after any repeat sample tests positive for coliform. All other E. coli monitoring and testing procedure violations require Tier 3 notification.
Table 13 Footnote 6 At a ground water system, Tier 1 notification is required after initial detection of E. coli or other fecal indicator in raw source water, if the system does not provide 4-log virus treatment and process compliance monitoring. Confirmation of E. coli or other fecal indicator in the source water requires Tier 1 notification. Failure to take confirmatory samples may be a public health hazard requiring Tier 1 notification.
Table 13 Footnote 7 Notice of the fecal indicator positive raw water sample must be made in the annual water supply statement (see section 5-1.72(e)), until the annual report documents that corrective action has been completed.
Table 13 Footnote 8 State notification must be made by the supplier of water within 24 hours of learning of the violation.
Table 13 Footnote 9 Tier 2 notification is normally required; however, there may be situations where the State determines that a Tier 1 notification is necessary to protect the public health. The supplier of water must provide the Tier 1 notification no later than 24 hours after learning of the State's determination.
Table 13 Footnote 10 If the daily entry point analysis exceeds one NTU, a repeat sample must be taken as soon as practicable, and preferably within one hour. If the repeat sample exceeds one NTU, the supplier of water must make state notification.
Table 13 Footnote 11 Systems must consult with the State within 24 hours after learning of the violation. Based on this consultation, the State may subsequently decide to elevate the violation from a Tier 2 to a Tier 1 notification. If consultation does not take place within the 24-hour period, the water system must distribute a Tier 1 notification no later than 48 hours after the system learns of the violation.
Table 13 Footnote 12 These violations include the following: failure to comply with the treatment technique or monitoring requirements in section 5-1.30(a), (b), (c), and (g) of this Subpart; failure to comply with the avoidance criteria in section 5-1.30(c) of this Subpart; failure to cover a finished water storage facility or treat its discharge required in section 5-1.32 of this Subpart; failure to report to the state information required in section 5-1.72(c)(3) of this Subpart; failure to maintain records required in section 5-1.72(d)(7) of this Subpart; and failure to meet the treatment and bin classification requirements associated with Cryptosporidium in section 5-1.83 of this Subpart. Failure to collect three or more samples for Cryptosporidium analysis as required in section 5-1.81 of this Subpart is a Tier 2 violation requiring public notification. Failure to perform any other monitoring and testing procedure as required in section 5-1.81 of this Subpart is a Tier 3 violation.
Table 13 Footnote 13 Any significant deficiency that is not corrected, or where correction has not begun according to a State-approved corrective action plan within 120 days, or as directed by the State, is a treatment technique violation and must be addressed in accordance with the requirements in section 5-1.12. If the deficiency is a public health hazard, the deficiency must be addressed as directed by the State and Tier 1 notification is required.
Table 13 Footnote 14 Applies to systems that have surface water or groundwater directly influenced by surface water as a source and use chlorine. The system must make State notification whether the residual was restored to at least 0.2 mg/L within four hours.
Table 13 Footnote 15 Required minimum chlorine residual at point that demonstrates adequate CT for disinfected water from ground water sources at first customer.
Table 13 Footnote 16 Failure to take a confirmation sample within 24 hours for nitrate or nitrite after an initial sample exceeds the MCL requires a Tier 1 notification. Other monitoring violations for nitrate or nitrite require a Tier 3 notification.
Table 13 Footnote 17 Failure to monitor for chlorine dioxide at the entrance to the distribution system the day after exceeding the MRDL at the entrance to the distribution system requires a Tier 2 notification. Other monitoring violations for chlorine dioxide at the entrance to the distribution system require a Tier 3 notification.
Table 13 Footnote 18 If any daily sample taken at the entrance to the distribution system exceeds the MRDL for chlorine dioxide and one or more samples taken in the distribution system the next day exceed the MRDL, Tier 1 notification is required. Failure to take the required samples in the distribution system the day after the MRDL is exceeded at the entry point also triggers Tier 1 notification.
Table 13 Footnote 19 Tier 1 notification is required if the situation meets the definition of a public health hazard.

Effective Date: May 26, 2004

TABLE 14A-CT VALUES (CT99.9) FOR 99.9 PERCENT INACTIVATION OF GIARDIA LAMBLIA CYSTS BY FREE CHLORINE AT 0.5 DEGREES CELSIUS OR LOWER*

Free chlorine residual (mg/l)                    pH 
                            <=6.0   6.5   7.0   7.5   8.0   8.5   9.0
<=0.4                         137   163   195   237   277   329   390 
 0.6                          141   168   200   239   286   342   407 
 0.8                          145   172   205   246   295   354   422 
 1.0                          148   176   210   253   304   365   437 
 1.2                          152   180   215   259   313   376   451 
 1.4                          155   184   221   266   321   387   464 
 1.6                          157   189   226   273   329   397   477 
 1.8                          162   193   231   279   338   407   489 
 2.0                          165   197   236   286   346   417   500 
 2.2                          169   201   242   297   353   426   511 
 2.4                          172   205   247   298   361   435   522 
 2.6                          175   209   252   304   368   444   533 
 2.8                          178   213   257   310   375   452   543 
 3.0                          181   217   261   316   382   460   552 

* These CT values achieve greater than a 99.99 percent inactivation of viruses. CT values between the indicated pH values may be determined by linear interpolation. CT values between the indicated temperatures of different tables may be determined by linear interpolation. If no interpolation is used, use the CT99.9 value at the lower temperature, and at the higher pH.


TABLE 14B-CT VALUES (CT99.9) FOR 99.9 PERCENT INACTIVATION OF GIARDIA LAMBLIA CYSTS BY FREE CHLORINE AT 5.0 DEGREES CELSIUS*

 Free chlorine residual (mg/l)                    pH 
                              6.0   6.5   7.0   7.5   8.0   8.5   9.0 
 0.4                          97    117   139   166   198   236   279 
 0.6                          100   120   143   171   204   244   291 
 0.8                          103   122   146   175   210   252   301 
 1.0                          105   125   149   179   216   260   312 
 1.2                          107   127   152   183   221   267   320 
 1.4                          109   130   155   187   227   274   329 
 1.6                          111   132   158   192   232   281   337 
 1.8                          114   135   162   196   238   287   345 
 2.0                          116   138   165   200   243   294   353 
 2.2                          118   140   169   204   248   300   361 
 2.4                          120   143   172   209   253   306   368 
 2.6                          122   146   175   213   258   312   375 
 2.8                          124   148   178   217   263   318   382 
 3.0                          126   151   182   221   268   324   389 

* These CT values achieve greater than a 99.99 percent inactivation of viruses. CT values between the indicated pH values may be determined by linear interpolation. CT values between the indicated temperatures of different tables may be determined by linear interpolation. If no interpolation is used, use the CT{99.9} value at the lower temperature, and at the higher pH.


TABLE 14C-CT VALUES (CT99.9) FOR 99.9 PERCENT INACTIVATION OF GIARDIA LAMBLIA CYSTS BY FREE CHLORINE AT 10.0 DEGREES CELSIUS*

Free chlorine residual (mg/l)                    pH
                              6.0   6.5   7.0   7.5   8.0   8.5   9.0
 0.4                           73    88   104   125   149   177   209
 0.6                           75    90   107   128   153   183   218
 0.8                           78    92   110   131   158   189   226
 1.0                           79    94   112   134   162   195   234
 1.2                           80    95   114   137   166   200   240
 1.4                           82    98   116   140   170   206   247
 1.6                           83    99   119   144   174   211   253
 1.8                           86   101   122   147   179   215   259
 2.0                           87   104   124   150   182   221   265
 2.2                           89   105   127   153   186   225   271
 2.4                           90   107   129   157   190   230   276
 2.6                           92   110   131   160   194   234   281
 2.8                           93   111   134   163   197   239   287
 3.0                           95   113   137   166   201   243   292

* These CT values achieve greater than a 99.99 percent inactivation of viruses. CT values between the indicated pH values may be determined by linear interpolation. CT values between the indicated temperatures of different tables may be determined by linear interpolation. If no interpolation is used, use the CT99.9 value at the lower temperature, and at the higher pH.


TABLE 14D-CT VALUES (CT99.9) FOR 99.9 PERCENT INACTIVATION OF GIARDIA LAMBLIA CYSTS BY FREE CHLORINE AT 15.0 DEGREES CELSIUS*

 Free chlorine residual (mg/l)                    pH 
                              6.0   6.5   7.0   7.5   8.0   8.5   9.0 
 0.4                           49    59    70    83    99   118   140 
 0.6                           50    60    72    86   102   122   146
 0.8                           52    61    73    88   105   126   151
 1.0                           53    63    75    90   108   130   156
 1.2                           54    64    76    92   111   134   160
 1.4                           55    65    78    94   114   137   165
 1.6                           56    66    79    96   116   141   169
 1.8                           57    68    81    98   119   144   173
 2.0                           58    69    83   100   122   147   177
 2.2                           59    70    85   102   124   150   181
 2.4                           60    72    86   105   127   153   184
 2.6                           61    73    88   107   129   156   188
 2.8                           62    74    89   109   132   159   191
 3.0                           63    76    91   111   134   162   195

* These CT values achieve greater than a 99.99 percent inactivation of viruses. CT values between the indicated pH values may be determined by linear interpolation. CT values between the indicated temperatures of different tables may be determined by linear interpolation. If no interpolation is used, use the CT99.9 value at the lower temperature, and at the higher pH.


TABLE 14E-CT VALUES (CT99.9) FOR 99.9 PERCENT INACTIVATION OF GIARDIA LAMBLIA CYSTS BY FREE CHLORINE AT 20.0 DEGREES CELSIUS*

Free chlorine residual (mg/l)                    pH
                               6.0   6.5   7.0  7.5   8.0   8.5   9.0
 0.4                           36    44    52    62    74    89   105 
 0.6                           38    45    54    64    77    92   109
 0.8                           39    46    55    66    79    95   113 
 1.0                           39    47    56    67    81    98   117
 1.2                           40    48    57    69    83   100   120
 1.4                           41    49    58    70    85   103   123
 1.6                           42    50    59    72    87   105   126
 1.8                           43    51    61    74    89   108   129 
 2.0                           44    52    62    75    91   110   132 
 2.2                           44    53    63    77    93   113   135 
 2.4                           45    54    65    78    95   115   138 
 2.6                           46    55    66    80    97   117   141 
 2.8                           47    56    67    81    99   119   143 
 3.0                           47    57    68    83   101   122   146 

* These CT values achieve greater than a 99.99 percent inactivation of viruses. CT values between the indicated pH values may be determined by linear interpolation. CT values between the indicated temperatures of different tables may be determined by linear interpolation. If no interpolation is used, use the CT99.9 value at the lower temperature, and at the higher pH.


TABLE 14F-CT VALUES (CT99.9) FOR 99.9 PERCENT INACTIVATION OF GIARDIA LAMBLIA CYSTS BY FREE CHLORINE AT 25.0 DEGREES CELSIUS AND HIGHER*

 Free chlorine residual (mg/l)                    pH 
                               6.0   6.5   7.0   7.5   8.0  8.5   9.0 
 0.4                           24    29    35    42    50    59   70 
 0.6                           25    30    36    43    51    61   73 
 0.8                           26    31    37    44    53    63   75 
 1.0                           26    31    37    45    54    65   78 
 1.2                           27    32    38    46    55    67   80 
 1.4                           27    33    39    47    57    69   82 
 1.6                           28    33    40    48    58    70   84 
 1.8                           29    34    41    49    60    72   86 
 2.0                           29    35    41    50    61    74   88 
 2.2                           30    35    42    51    62    75   90 
 2.4                           30    36    43    52    63    77   92 
 2.6                           31    37    44    53    65    78   94 
 2.8                           31    37    45    54    66    80   96 
 3.0                           32    38    46    55    67    81   97

* These CT values achieve greater than a 99.99 percent inactivation of viruses. CT values between the indicated pH values may be determined by linear interpolation. CT values between the indicated temperatures of different tables may be determined by linear interpolation. If no interpolation is used, use the CT99.9 value at the lower temperature, and at the higher pH.


TABLE 14G-CT VALUES (CT99.9) FOR 99.9 PERCENT INACTIVATION OF GIARDIA LAMBLIA CYSTS BY CHLORINE DIOXIDE AND OZONE1 2

Degrees Celsius
≤1510152025
Chlorine dioxide632623191511
Ozone2.91.91.40.950.720.48

Table14G Footnote 1 These CT values achieve greater than a 99.99 percent inactivation of viruses. CT values between the indicated temperatures may be determined by linear interpolation. If no interpolation is used, use the CT99.9 value at the lower temperature for determining CT99.9 values between indicated temperatures.
Table14G Footnote 2 The use of these alternative disinfectants shall be approved in accordance with the provisions of section 5-1.22 of this Subpart.

Effective Date: January 17, 2018

TABLE 14H CT Values (CT 99.9) for 99.9 Percent Inactivation of Giardia Lamblia Cysts by Chloramines1

Water Temperature, in Degrees Celsius
<1510152025
38002200185015001100750

Table14H Footnote 1 These values are for pH values of 6 to 9. These CT values may be assumed to achieve greater than 99.99 percent inactivation of viruses only if chlorine is added and mixed in the water prior to the addition of ammonia. If this condition is not met, the system must demonstrate, based on on-site studies or other information, as approved by the State, that the system is achieving at least 99.99 percent inactivation of viruses. CT values between the indicated temperatures may be determined by linear interpolation. If no interpolation is used, use the CT99.9 value at the lower temperature for determining CT99.9 values between indicated temperatures.

Effective Date: January 17, 2018

TABLE 14I CT Values (mg⋅min/L ) for Cryptosporidium Inactivation by Chlorine Dioxide1

Log CreditWater Temperature, in Degrees Celsius
<=0.5123571015202530
0.25159153140128107906945291912
0.531930527925921418013889583824
1.06376105585114293602771791167549
1.595691583876764353941526817411373
2.0127512201117102385871955335723215098
2.515941525139612781072899691447289188122
3.0191218301675153412861079830536347226147

Table14I Footnote 1 Systems may use this equation to determine log credit between the indicated values:
Log credit = (0.001506 x (1.09116)Temp) x CT.

Effective Date: January 17, 2018

TABLE 14J CT Values (mg⋅min/L ) for Cryptosporidium Inactivation by Ozone1

Log CreditWater Temperature, in Degrees Celsius
<=0.5123571015202530
0.256.05.85.24.84.03.32.51.61.00.60.39
0.51212109.57.96.54.93.12.01.20.78
1.02423211916139.96.23.92.51.6
1.5363531292420159.35.93.72.4
2.048464238322620127.84.93.1
2.560585248403325169.86.23.9
3.07269635747393019127.44.7

Table14J Footnote 1 Systems may use this equation to determine log credit between the indicated values:
Log credit = (0.0397 x (1.09757)Temp) x CT.

Effective Date: January 17, 2018

TABLE 14K UV Dose Table for Cryptosporidium, Giardia lamblia, and Virus Inactivation Credit1,2,3,4

Log CreditCryptosporidium UV dose
(mJ/cm2)
Giardia lamblia UV dose
(mJ/cm2)
Virus UV dose
(mJ/cm2)
0.51.61.539
1.02.52.158
1.53.93.079
2.05.85.2100
2.58.57.7121
3.01211143
3.51515163
4.02222186

Table14K Footnote 1 Ultraviolet light. Systems receive Cryptosporidium, Giardia lamblia, and virus treatment credits for ultraviolet (UV) light reactors by achieving the corresponding UV dose values shown in this table. Systems must use validated UV reactors and monitor UV reactors as described in footnotes 3 and 4 of this table to demonstrate that they are achieving a particular UV dose value for treatment credit.
Table14K Footnote 2 UV dose table. The treatment credits listed in this table are for UV light at a wavelength of 254 nm as produced by a low pressure mercury vapor lamp. To receive treatment credit for other lamp types, systems must demonstrate an equivalent germicidal dose through reactor validation testing, as described in footnote 3 of this table. The UV dose values in this table are applicable only to unfiltered systems (either by filtration waiver or those that do not require filtration) and to post-filter applications of UV in filtered systems.
Table14K Footnote 3 Reactor validation testing. Systems must use UV reactors that have undergone validation testing to determine the operating conditions under which the reactor delivers the UV dose required in footnote 2 of this table (i.e., validated operating conditions). These operating conditions must include flow rate, UV intensity as measured by a UV sensor, and UV lamp status.
• When determining validated operating conditions, systems must account for the following factors: UV absorbance of the water; lamp fouling and aging; measurement uncertainty of on-line sensors; UV dose distributions arising from the velocity profiles through the reactor; failure of UV lamps or other critical system components; and inlet and outlet piping or channel configurations of the UV reactor.
• Validation testing must include full scale testing of a reactor that conforms uniformly to the UV reactors used by the system and inactivation of a test microorganism whose dose response characteristics have been quantified with a low pressure mercury vapor lamp. The State may approve an alternative approach to validation testing.
Table14K Footnote 4 Reactor monitoring.
• To receive treatment credit for UV light, systems must treat at least 95 percent of the water delivered to the public during each month by UV reactors operating within validated conditions for the required UV dose, as described in footnotes 2 and 3 of this table. Systems must demonstrate compliance with this condition by monitoring UV intensity as measured by a UV sensor, flow rate, lamp status, and other parameters designated by the State.

Effective Date: November 9, 2011

TABLE 15-Entry Point Disinfection Monitoring for Systems Using Chemical Disinfection1

Water System Source TypePopulation servedSamples per day4
Surface Water or Ground Water under the Direct Influence of Surface Water (GWUDI)2,3 Up to 5001
501 - 1,0002
1,001 - 2,5003
2,501 - 3,3004
> 3,300Continuous monitoring required5
Ground Water System or ground water source required to provide 4-log virus treatment and process compliance monitoring6,7,8≤ 3,30019
> 3,300Continuous monitoring required5
Ground Water System or ground water source with other than 4-log virus treatmentAny19

Table 15 Footnote 1 See also Table 15A for distribution system disinfectant residual sampling locations and frequency depending on disinfectant used.
Table 15 Footnote 2 If at any time the chlorine residual concentration falls below 0.2 mg/l at the entry point for a surface water or GWUDI system, the system must collect and analyze a grab sample every four hours until the chlorine residual concentration is again equal to or greater than 0.2 mg/l.
Table 15 Footnote 3 Entry point samples collected at Surface Water or GWUDI systems
Table 15 Footnote 4 The day's grab samples may not be conducted at the same time.
Table 15 Footnote 5 If there is a failure in the continuous monitoring equipment, grab samples, every four hours, may be conducted in lieu of continuous monitoring, but for no more than five working days (fourteen working days for ground water systems) following the failure of the equipment.
Table 15 Footnote 6 If at any time the disinfectant concentration at a ground water system falls below the minimum required in the process compliance monitoring plan approved by the State, the system must collect and analyze a grab sample every four hours until the disinfectant residual concentration is again at or above minimum required levels, without exceeding other applicable concentration requirements in Table 3A.
Table 15 Footnote 7 Any ground water system required to provide 4-log virus treatment because of fecal contamination of the source or because of significant deficiencies in system operation, and using chemical disinfection, must demonstrate minimum disinfectant residual at a location that demonstrates adequate concentration to provide the required treatment at the first customer during peak flow according to the sampling plan developed for the system. These samples to confirm the minimum disinfection residual are to be collected at the frequency in this table.
Table 15 Footnote 8 Lowest daily concentration must be recorded on operation report.
Table 15 Footnote 9 A minimum of one disinfectant residual concentration must be recorded on operation report every day.

Effective Date: November 9, 2011

TABLE 15A-Disinfectant Residual Minimum Distribution Monitoring Requirements for Systems Using Chemical Disinfection

DisinfectantType of Water SystemRoutine Monitoring
Chlorine ChloraminesCommunity and Nontransient NoncommunitySample at the same time and same points in the distribution system as total coliform sampling1
Chlorine Dioxide2Community, Nontransient Noncommunity and Transient NoncommunityDaily sample at the entrance to the distribution system3

Table 15A Footnote 1 Community Water Systems using surface water or ground water under the direct influence of surface water may use heterotrophic plate count results of equal to or less than 500 colonies per milliliter as equivalent to a free chlorine residual as outlined in table 11, footnote 5 in lieu of taking separate samples for disinfection residuals.
Table 15A Footnote 2 Monitoring is required if chlorine dioxide is used for either oxidation or disinfection.
Table 15A Footnote 3 If the Maximum Residual Disinfectant Level (MRDL) of 0.8 mg/L is exceeded, the system must take three samples in the distribution system on the following day. If chlorine dioxide or chloramines are used to maintain a disinfectant residual in the distribution system, or if chlorine is used and there are no rechlorination stations, the system must take 3 samples as close to the first customer as possible, at intervals of at least 6 hours. If chlorine is used and there is a rechlorination station, the system must take one sample as close to the first customer as possible, one sample representing average residence time, and one sample representing maximum residence time.

Effective Date: November 9, 2011 (current for 2018-05-16 version)

TABLE 16-Additional Contaminants for which Reporting is Required Pursuant to 5-1.72(e)-(h) of this Subpart

Contaminant Name

2,4-dinitrotoluene
2,6-dinitrotoluene
DCPA monoacid
DCPA di acid
4,4'-DDE
EPTC
Molinate
MTBE
Nitrobenzene
Terbacil
Acetochlor
Perchlorate
Diuron
Linuron
Prometon
2,4,6-trichlorophenol
2,4-dichlorophenol
2,4-dinitrophenol
2-methyl-1-phenol
Alachlor ESA
1,2-diphenylhydrazine
Diazinon
Disulfoton
Fonofos
Terbufos
Aeromonas Hydrophilia
Polonium-210
RDX
Algae and toxins
Echoviruses
Coxsackie viruses
Helicobacter pylori
Microsporidia
Caliciviruses
Adenoviruses
Lead - 210
Napthalene


Effective Date: April 25, 2001. Unchanged in 2018-05-16 version

TABLE 17-Information Collection Rule Contaminant Reporting Requirements

ContaminantReporting Requirements for Finished Water
Total Trihalomethanes (chloroform, bromodichloromethane, dibromochloromethane, and bromoform)Report as a group if detected
Haloacetic Acids (mono-, di-, and trichloroacetic acid, and mono- and di-bromoacetic acid)Report as a group if detected
Haloacetilenitriles (dichloro-, trichloro-, bromochloro-, and dibromoacetonitrile)Report as a group if detected
Haloketones (1,1-dichloropropanone and 1,1,1-trichloropropanine)Report as a group if detected
ChloropicrinReporting required if detected
Chloral HydrateReporting required if detected
Total Organic HalidesReporting required if detected
Disinfectant ResidualReporting required if detected
Cyanogen ChlorideReport if detected and treatment plant uses Chloramines
ChlorateReport if detected and treatment plant uses Hypochlorite Solutions
Bromate, AldehydesReport if detected and treatment plant uses Ozone
Chlorine Dioxide residual, Chlorite, Chlorate, Bromate, AldehydesReport if detected and treatment plant uses Chlorine Dioxide
Total ColiformsReport if detected
Fecal Coliforms or Escherichia coliReport if detected
GiardiaReport if detected
Total Culturable VirusesReport if detected

5-1.1 | 5-1.2 | 5-1.3 | 5-1.4 | 5-1.5 | 5-1.7 | 5-1.8 | 5-1.9