Illinois Administrative Code

Section 617.210 Registration of Potential Sources and Routes of Groundwater Contamination The owner or operator of potential sources or routes of groundwater contamination, located wholly or partially within the Pleasant Valley Public Water District's regulated recharge area defi…

Section 617.215 Recharge Area Registration Meeting The Agency must hold an informational and registration meeting for the owners or operators of potential sources and routes of groundwater contamination that are located within the boundaries of the regulated recharge area. a) Wit…

Section 617.220 Management Systems for Potential Sources a) The owner or operator of any potential tertiary source of groundwater contamination located wholly or partially within the regulated recharge area must develop and implement a chemical substances management system that m…

Section 617.225 Training Program for Potential Tertiary Sources a) A chemical substance management training program (as required in Section 617.220(a)) must be conducted by the Agency as follows: 1) The training program must cover the following topics: A) an overview of the sensi…

Section 617.APPENDIX B Potential Route and Source Registration Form SECTION 617.APPENDIX B – PLEASANT VALLEY PUBLIC WATER DISTRICT POTENTIAL SOURCE AND ROUTE REGISTRATION FORM DATE: COMPANY/FACILITY NAME: MAILING ADDRESS: PHONE: ( ) COMPANY/FACILITY CONTACT NAME: PHONE: ( ) EMERG…

Section 618.100 Purpose and Applicability a) This Part is established in the interest of securing the public health, safety, and welfare; to preserve the quality and quantity of groundwater resources in order to assure a safe and adequate water supply for present and future gener…

Section 618.105 Definitions a) Unless specified otherwise, all terms have the meanings set forth in the Illinois Environmental Protection Act [415 ILCS 5], the Illinois Groundwater Protection Act [415 ILCS 55], and 35 Ill. Adm. Code 671. b) For the purposes of this Part, the foll…

Section 618.110 Regulated Activities, Facilities, or Units All new or existing activities, facilities, or units located wholly or partially in any maximum setback zone created by this Part are subject to the groundwater requirements in Section 14.4 of the Act and any Board rules …

Section 618.115 Prohibitions New potential primary sources of groundwater contamination are prohibited from locating wholly or partially within any maximum setback zone established under Section 14.3 of the Act or this Part. (Source: Added at 36 Ill. Reg. 10042, effective June 27…

Section 618.200 Purpose This Subpart describes maximum setback zones for individual community water supply wells in the interest of securing the public health, safety, and welfare; to preserve the quality and quantity of groundwater resources in order to assure a safe and adequat…

Section 618.205 Marquette Heights' Maximum Setback Zone The Marquette Heights' maximum setback zone is established as delineated in Appendix A. (Source: Amended at 47 Ill. Reg. 7708, effective May 16, 2023)

Section 618.210 Fayette Water Company's Maximum Setback Zone The Fayette Water Company's maximum setback zone is established as delineated in Appendix B. (Source: Amended at 47 Ill. Reg. 7708, effective May 16, 2023)

Section 618.APPENDIX B Boundaries of Fayette Water Company's Maximum Setback Zone MAXIMUM SETBACK ZONE FAYETTE WATER COMPANY (IL0510010) T8N R2E 3rd PRINCIPAL MERIDIAN SECTION 31 Partially Contained Wholly Contained 200 - 004 400 - 008 200 - 005 200 - 008 400 - 003 400 - 006 400 …

Section 620.105 Purpose This Part specifies requirements, standards, and procedures for protecting and managing groundwater quality, including groundwater classification, nondegradation, and groundwater quality standards. (Source: Amended at 49 Ill. Reg. 4488, effective March 28,…

Section 620.110 Definitions The definitions of the Environmental Protection Act [415 ILCS 5] and the Groundwater Protection Act [415 ILCS 55] apply to this Part. The following definitions also apply to this Part; "Act" means the Environmental Protection Act [415 ILCS 5]. "Agency"…

Section 620.115 Prohibition A person must not cause, threaten, or allow a violation of the Act, the IGPA, or regulations adopted by the Board under either statute, including this Part. (Source: Amended at 49 Ill. Reg. 4488, effective March 28, 2025)

Section 620.125 Incorporations by Reference a) The Board incorporates the following material by reference: ASTM International. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959 (610) 832-9500. "Standard Practice for Classification of Soils for Engineering Purpo…

Section 620.130 Exemption from General Use Standards and Public and Food Processing Water Supply Standards Groundwater is not required to meet the general use standards and public and food processing water supply standards of 35 Ill. Adm. Code 302.Subparts B and C.

Section 620.135 Exclusion for Underground Water in Certain Man-Made Conduits This Part does not apply to underground waters contained in man-made subsurface drains, tunnels, reservoirs, storm sewers, tiles or sewers. SUBPART B: GROUNDWATER CLASSIFICATION

Section 620.201 Groundwater Designations All groundwaters of the State are designated as: a) One of the following four classes of groundwater under Sections 620.210 through 620.240: 1) Class I: Potable Resource Groundwater; 2) Class II: General Resource Groundwater; 3) Class III:…

Section 620.210 Class I: Potable Resource Groundwater Except as provided in Section 620.230, 620.240, or 620.250, Potable Resource Groundwater is as described in subsection (a) or (b): a) Groundwater that is 10 feet or more below the land surface and within: 1) The minimum setbac…

Section 620.220 Class II: General Resource Groundwater Except as provided in Section 620.250, General Resource Groundwater is as described in subsection (a) or (b): a) Groundwater that does not meet Section 620.210 (Class I), Section 620.230 (Class III), or Section 620.240 (Class…

Section 620.230 Class III: Special Resource Groundwater Except as provided in Section 620.250, Special Resource Groundwater is as described in subsection (a) or (b): a) Groundwater that is determined by the Board, under the procedures specified in Section 620.260, to be: 1) Demon…

Section 620.240 Class IV: Other Groundwater Except as provided in Section 620.250, Other Groundwater is as described in subsection (a), (b), (c), (d), (e), (f), (g), or (h). a) Groundwater within a zone of attenuation under 35 Ill. Adm. Code 811 and 814. b) Groundwater within a p…

Section 620.250 Groundwater Management Zone a) Within any class of groundwater, a groundwater management zone (GMZ) may be established as a three-dimensional region containing groundwater being managed to mitigate impairment caused by the release of one or more contaminants that …

Section 620.260 Reclassification of Groundwater by Adjusted Standard Any person may petition the Board for an adjusted standard to reclassify a groundwater under Section 28.1 of the Act and 35 Ill. Adm. Code 104.Subpart D. In any proceeding to reclassify specific groundwater by a…

Section 620.301 General Prohibition Against Use Impairment of Resource Groundwater a) A person must not cause, threaten, or allow the release of any contaminant to a resource groundwater such that: 1) Treatment or additional treatment is necessary to continue an existing use or t…

Section 620.302 Applicability of Preventive Notification and Preventive Response Activities a) Preventive notification and preventive response activities, as specified in Sections 620.305 through 620.310, apply to: 1) Class I groundwater under Section 620.210(a)(1), (a)(2), (a)(3…

Section 620.305 Preventive Notification Procedures a) For groundwater quality monitoring under Section 620.302, a preventive notification must occur whenever a contaminant: 1) Specified in Section 620.310(a)(3)(A) is detected (except due to natural causes) in Class I groundwater;…

Section 620.310 Preventive Response Activities a) The following preventive assessment must be undertaken: 1) If a preventive notification under Section 620.305(c) is provided by a community water supply: A) The Agency must notify the owner or operator of any identified potential …

Section 620.401 Applicability Groundwater must meet the standards appropriate to the groundwater's class as specified in this Subpart and the nondegradation provisions of Subpart C (Source: Amended at 49 Ill. Reg. 4488, effective March 28, 2025)

Section 620.405 General Prohibitions Against Violations of Groundwater Quality Standards A person must not cause, threaten, or allow the release of any contaminant to groundwater so as to cause a groundwater quality standard specified in this Subpart to be exceeded. (Source: Amen…

Section 620.410 Groundwater Quality Standards for Class I: Potable Resource Groundwater a) Inorganic Chemical Constituents Except due to natural causes or as provided in Section 620.450, concentrations of the following chemical constituents must not be exceeded in Class I groundw…

Section 620.420 Groundwater Quality Standards for Class II: General Resource Groundwater a) Inorganic Chemical Constituents 1) Except due to natural causes or as provided in Section 620.450 or subsection (a)(3) or (e) of this Section, concentrations of the following chemical cons…

Section 620.430 Groundwater Quality Standards for Class III: Special Resource Groundwater Except due to natural causes, concentrations of inorganic and organic chemical constituents and ranges of pH must not exceed the standards specified in Section 620.410. This prohibition does…

Section 620.440 Groundwater Quality Standards for Class IV: Other Groundwater a) Except as provided in subsection (b), (c), (d), or (e) Class IV: Other Groundwater standards are equal to the existing concentrations of constituents in groundwater. b) For groundwater within a zone …

Section 620.450 Alternative Groundwater Quality Standards a) Groundwater Quality Restoration Standards 1) Subsections (a)(3) and (a)(4)(B) apply to all released chemical constituents in groundwater within a groundwater management zone (GMZ) that are the subject of the GMZ approve…

Section 620.505 Compliance Determination a) Except as this Part provides otherwise, compliance with the standards of this Part at a site is to be determined as follows: 1) For a structure (e.g., buildings), at the closest practicable distance beyond the outermost edge of the stru…

Section 620.510 Monitoring and Analytical Requirements a) Representative Samples A representative sample must be taken from locations as specified in Section 620.505. b) Sampling and Analytical Procedures 1) Samples must be collected in compliance with the procedures specified in…

Section 620.601 Purpose of a Health Advisory This Subpart establishes procedures for issuing a Health Advisory that specifies guidance levels that, in the absence of standards in Section 620.410, must be considered by the Agency in: a) Establishing groundwater cleanup or action l…

Section 620.605 Issuance of a Health Advisory a) The Agency must issue a Health Advisory for a chemical substance if the following conditions are met: 1) A community water supply well is sampled and the chemical substance is detected and confirmed by resampling; 2) There is no st…

Section 620.610 Publishing Health Advisories a) The Agency must publish the full text of each Health Advisory upon issuance and make the document available to the public. b) The Agency must publish and make available to the public, at intervals of not more than 6 months, a compre…

Section 620.615 Additional Health Advice for Mixtures of Similar-Acting Substances a) The Agency must determine the need for additional health advice appropriate to site-specific conditions when mixtures of chemical substances are detected and two or more of the chemical substanc…

Section 620.APPENDIX D Information Required for Groundwater Management Zone Application under 35 Ill. Adm. Code 620.250(b) and Corrective Action Completion Certification under 35 Ill. Adm. Code 620.250(d) Within any class of groundwater, a groundwater management zone (GMZ) may be…

Section 652.100 Purpose The purpose of this Part is to: a) specify electronic reporting requirements for community water supplies pursuant to Section 4(aa) of the Act; b) provide rules for the prevention of environmental degradation that might occur when carrying out corrosion pr…

Section 652.110 Definitions In addition to these definitions, all definitions of the Illinois Environmental Protection Act [415 ILCS 5] shall apply to this Part. For purposes of this Part: "Act" means the Illinois Environmental Protection Act [415 ILCS 5]. "Agency" means the Envi…

Section 652.120 Electronic Reporting Requirements a) All community water supplies must submit the following information to the Agency electronically: 1) monitoring data necessary to comply with the Safe Drinking Water Act and the National Primary Drinking Water Regulations in 40 …