Part 611: PRIMARY DRINKING WATER STANDARDS

Section 611.290 Point-of-Use Devices or Bottled Water a) A supplier may not use bottled water to comply with an MCL. b) A supplier may use bottled water or point-of-use devices on a temporary basis to avoid an unreasonable risk to human health under an Agency-issued SEP. c) Any u…

Section 611.295 General Requirements This Subpart D constitutes NPDWRs. This Subpart D establishes treatment techniques in lieu of MCLs for specified contaminants. BOARD NOTE: This Section derives from 40 CFR 141.110. (Source: Amended at 47 Ill. Reg. 16486, effective November 2, …

Section 611.296 Acrylamide and Epichlorohydrin a) Each supplier must annually certify in writing to the Agency that when it uses products containing acrylamide or epichlorohydrin in the PWS, the product of monomer level and dose does not exceed the level subsection (b) specifies.…

Section 611.297 Corrosion Control (Repealed) (Source: Repealed at 43 Ill. Reg. 8206, effective July 26, 2019) SUBPART F: MAXIMUM CONTAMINANT LEVELS (MCLs) AND MAXIMUM RESIDUAL DISINFECTANT LEVELS (MRDLs)

Section 611.300 State-Only MCLs for Inorganic Chemical Contaminants a) The State-only MCLs listed in subsection (b) for inorganic chemical contaminants (IOCs) are additional State requirements. The State-only MCLs apply only to CWS suppliers. The supplier must determine complianc…

Section 611.301 Revised MCLs for Inorganic Chemical Contaminants a) This subsection corresponds with 40 CFR 141.62(a), reserved by USEPA. This statement maintains structural consistency with USEPA rules. b) The MCLs in the following table apply to CWSs. Except for fluoride, the M…

Section 611.310 State-Only Maximum Contaminant Levels (MCLs) for Organic Chemical Contaminants The following are State-only MCLs for organic chemical contaminants. These State-only MCLs apply to all CWSs. A supplier must calculate compliance with these State-only MCLs in subsecti…

Section 611.311 MCLs for Organic Chemical Contaminants a) Maximum Contaminant Levels for Volatile Organic Chemical Contaminants. The MCLs for VOCs apply to CWS suppliers and NTNCWS suppliers: CAS No. Contaminant MCL (mg/L) 71-43-2 Benzene 0.005 56-23-5 Carbon tetrachloride 0.005 …

Section 611.312 Maximum Contaminant Levels (MCLs) for Disinfection Byproducts (DBPs) a) Bromate and Chlorite. MCLs for bromate and chlorite apply to CWS and NTNCWS suppliers: Disinfection Byproduct MCL (mg/L) Bromate 0.010 Chlorite 1.0 1) A Subpart B system supplier must comply w…

Section 611.313 Maximum Residual Disinfectant Levels (MRDLs) a) MRDLs: Disinfectant residual MRDL (mg/L) Chlorine 4.0 (as Cl2) Chloramines 4.0 (as Cl2) Chlorine dioxide 0.8 (as ClO2) b) Compliance 1) CWSs and NTNCWSs. A Subpart B system must comply with this Section. 2) Transient…

Section 611.320 Turbidity (Repealed) (Source: Repealed at 27 Ill. Reg. 16447, effective October 10, 2003)

Section 611.325 Microbiological Contaminants a) A supplier complies with the MCL for E. coli for samples taken under Subpart AA, unless any of the conditions identified in subsections (a)(1) through (a)(4) occur. For purposes of public notification under Subpart V, violating the …

Section 611.330 Maximum Contaminant Levels for Radionuclides a) This subsection (a) corresponds with 40 CFR 141.66(a), marked reserved by USEPA. This statement maintains structural consistency with USEPA rules. b) MCL for Combined Radium-226 and -228. The MCL for combined radium-…

Section 611.331 Beta Particle and Photon Radioactivity (Repealed) (Source: Repealed at 28 Ill. Reg. 5269, effective March 10, 2004) SUBPART G: LEAD AND COPPER

Section 611.350 General Requirements and Action Levels a) Applicability, effective date, compliance deadlines, and scope. The requirements for Subparts G, AG, and AH constitute NPDWRs for lead and copper. 1) This Subpart G, Subpart AG, and Subpart AH apply to community water syst…

Section 611.351 Applicability of Corrosion Control a) Corrosion control treatment. All suppliers are required to install, optimize, or re-optimize optimal corrosion control treatment (OCCT) in compliance with this section. This section provides when a supplier must complete the c…

Section 611.352 Corrosion Control Treatment Description of corrosion control treatment requirements. This section provides the requirements for suppliers and the Agency designating optimal corrosion control treatment (OCCT) for a supplier that is optimizing or re-optimizing OCCT.…

Section 611.353 Source Water Treatment A supplier must complete source water monitoring and treatment requirements (under subsection (b) and Sections 611.356 and 611.358) before specific deadlines. a) Deadlines for Completing Source Water Treatment Steps 1) Step 1: A supplier exc…

Section 611.354 Service Line Inventory and Replacing Service Lines a) Service line and connector inventory development. All suppliers must develop a service line inventory that identifies the material and location of each service line connected to the public water distribution sy…

Section 611.355 Public Education and Supplemental Monitoring and Mitigation A supplier that exceeds the lead action level based on tap water samples collected in compliance with Section 611.356 must distribute the public education materials contained in subsection (a) in complian…

Section 611.356 Tap Water Monitoring for Lead and Copper All suppliers must sample for lead and copper at taps used to provide water for human consumption in compliance with the requirements of this section. a) Sampling site location 1) By the start of the first tap monitoring pe…

Section 611.357 Monitoring for Water Quality Parameters All large suppliers and all medium suppliers with corrosion control treatment (unless deemed optimized under Section 611.351(b)(3)), and all small and medium suppliers that exceed the lead or copper action levels must sample…

Section 611.358 Monitoring for Lead and Copper in Source Water a) Sampling Location, Collection Methods, and Number of Samples 1) A supplier failing to meet the lead or copper action level on the basis of tap samples under Section 611.356 must collect lead and copper source water…

Section 611.359 Analytical Methods The supplier must conduct analyses for lead, copper, pH, alkalinity, orthophosphate, and silica, using the methods in Section 611.611(a). a) Only a certified laboratory in one of the categories in Section 611.490(a) may conduct analyses for lead…

Section 611.360 Reporting A supplier must report the following information to the Agency in compliance with this Section. a) Reporting requirements for tap monitoring for lead and copper and for distribution system and entry point monitoring for water quality parameters. 1) By th…

Section 611.361 Recordkeeping Any supplier subject to this Subpart G must keep original records of all sampling data and analyses, reports, surveys, letters, evaluations, schedules, Agency determinations, and any other information Sections 611.351 through 611.360, 611.362, and 61…

Section 611.362 Monitoring for Lead in Schools and Childcare Facilities a) General requirements. 1) All CWS suppliers must conduct public education and lead monitoring at the schools and childcare facilities they serve unless those schools or childcare facilities: A) Were constru…

Section 611.363 Small Supplier Compliance Flexibility Small CWS suppliers serving 3,300 or fewer persons and all NTNCWS suppliers that exceed the lead action level, but do not exceed the copper action level, may elect to use this provision in lieu of the corrosion control treatme…

Section 611.380 General Requirements a) This Subpart I Constitutes NPDWRs 1) This Subpart I establishes standards for a CWS supplier or an NTNCWS supplier adding a chemical disinfectant to its water in any part of the treatment process modifying its practices to comply with MCLs …

Section 611.381 Analytical Requirements a) A supplier must use only the analytical methods this Section specifies, each incorporated by reference in Section 611.102, or alternative methods that the Agency approved under Section 611.480 to demonstrate that it complies with this Su…

Section 611.382 Monitoring Requirements a) General Requirements 1) A supplier must take all samples during normal operating conditions. 2) A supplier may consider multiple wells drawing water from a single aquifer as one treatment plant for determining the minimum number of TTHM …

Section 611.383 Compliance Requirements a) General Requirements 1) If compliance is based on a running annual average of monthly or quarterly samples or averages and the supplier fails to monitor for TTHM, HAA5, or bromate, this failure to monitor will be treated as a monitoring …

Section 611.384 Reporting and Recordkeeping Requirements a) A supplier required to sample quarterly or more frequently must report to the Agency within ten days after the end of each quarter in which samples were collected, despite the provisions of Section 611.840. A supplier re…

Section 611.385 Treatment Technique for Control of Disinfection Byproduct (DBP) Precursors a) Applicability 1) A Subpart B system supplier using conventional filtration treatment (as defined in Section 611.101) must operate with enhanced coagulation or enhanced softening to achie…

Section 611.480 Alternative Analytical Techniques The Agency must approve, by a SEP, an alternative analytical technique if it determines that USEPA has approved the method as an alternative method by adding it to 40CFR 141 and the Board has not incorporated the federal approval …

Section 611.490 Certified Laboratories a) For the purpose of determining compliance with Subparts G, K through O, Q, S, and AZ samples will be considered only if they have been analyzed by one of the following: 1) A laboratory certified under Section 4(o) of the Act; 2) A laborat…

Section 611.491 Laboratory Testing Equipment (Repealed) (Source: Repealed at 43 Ill. Reg. 8206, effective July 26, 2019)

Section 611.500 Consecutive PWSs When a PWS supplies water to one or more other PWSs, the Agency must modify the monitoring requirements imposed by this Part to the extent that the interconnection of the PWSs justifies treating them as a single PWS for monitoring purposes. Any mo…

Section 611.510 Special Monitoring for Unregulated Contaminants (Repealed) (Source: Repealed at 27 Ill. Reg. 16447, effective October 10, 2003) SUBPART L: MICROBIOLOGICAL MONITORING AND ANALYTICAL REQUIREMENTS

Section 611.521 Routine Coliform Monitoring (Repealed) (Source: Repealed at 42 Ill. Reg. 1140, effective January 4, 2018)

Section 611.522 Repeat Coliform Monitoring (Repealed) (Source: Repealed at 42 Ill. Reg. 1140, effective January 4, 2018)

Section 611.523 Invalidation of Total Coliform Samples (Repealed) (Source: Repealed at 42 Ill. Reg. 1140, effective January 4, 2018)

Section 611.524 Sanitary Surveys (Repealed) (Source: Repealed at 42 Ill. Reg. 1140, effective January 4, 2018)

Section 611.525 Fecal Coliform and E. Coli Testing (Repealed) (Source: Repealed at 42 Ill. Reg. 1140, effective January 4, 2018)

Section 611.526 Analytical Methodology (Repealed) (Source: Repealed at 42 Ill. Reg. 1140, effective January 4, 2018)

Section 611.527 Response to Violation (Repealed) (Source: Repealed at 42 Ill. Reg. 1140, effective January 4, 2018)

Section 611.528 Transition from Subpart L to Subpart AA Requirements (Repealed) (Source: Repealed at 42 Ill. Reg. 1140, effective January 4, 2018)