TITLE 35: ENVIRONMENTAL PROTECTION SUBTITLE C: WATER POLLUTION CHAPTER I: POLLUTION CONTROL BOARD PART 302 WATER QUALITY STANDARDS The General Assembly's Illinois Administrative Code database includes only those rulemakings that have been permanently adopted. This menu will point out the Sections on which an emergency rule (valid for a maximum of 150 days, usually until replaced by a permanent rulemaking) exists. The emergency rulemaking is linked through the notation that follows the Section heading in the menu. View Entire Part SUBPART A: GENERAL WATER QUALITY PROVISIONS Section 302.100 Definitions Section 302.101 Scope and Applicability Section 302.102 Allowed Mixing, Mixing Zones, and ZIDs Section 302.103 Stream Flows Section 302.104 Main River Temperatures Section 302.105 Antidegradation SUBPART B: GENERAL USE WATER QUALITY STANDARDS Section 302.201 Scope and Applicability Section 302.202 Purpose Section 302.203 Offensive Conditions Section 302.204 pH Section 302.205 Phosphorus Section 302.206 Dissolved Oxygen Section 302.207 Radioactivity Section 302.208 Numeric Standards for Chemical Constituents Section 302.209 Fecal Coliform Section 302.210 Other Toxic Substances Section 302.211 Temperature Section 302.212 Total Ammonia Nitrogen Section 302.213 Effluent Modified Waters (Ammonia) (Repealed) SUBPART C: PUBLIC AND FOOD PROCESSING WATER SUPPLY STANDARDS Section 302.301 Scope and Applicability Section 302.302 Algicide Permits Section 302.303 Finished Water Standards Section 302.304 Chemical Constituents Section 302.305 Other Contaminants Section 302.306 Fecal Coliform Section 302.307 Radium 226 and 228 SUBPART D: CHICAGO AREA WATERWAY SYSTEM AND LOWER DES PLAINES RIVER WATER QUALITY STANDARDS AND INDIGENOUS AQUATIC LIFE STANDARDS Section 302.401 Scope and Applicability Section 302.402 Purpose Section 302.403 Unnatural Sludge Section 302.404 pH Section 302.405 Dissolved Oxygen Section 302.406 Fecal Coliform (Repealed) Section 302.407 Chemical Constituents Section 302.408 Temperature Section 302.409 Cyanide for the South Fork of the South Branch of the Chicago River (Bubbly Creek) Section 302.410 Other Toxic Substances Section 302.412 Total Ammonia Nitrogen SUBPART E: LAKE MICHIGAN BASIN WATER QUALITY STANDARDS Section 302.501 Scope, Applicability, and Definitions Section 302.502 Dissolved Oxygen Section 302.503 pH Section 302.504 Chemical Constituents Section 302.505 Fecal Coliform Section 302.506 Temperature Section 302.507 Thermal Standards for Existing Sources on January 1, 1971 Section 302.508 Thermal Standards for Sources Under Construction But Not In Operation on January 1, 1971 Section 302.509 Other Sources Section 302.510 Incorporations by Reference (Repealed) Section 302.515 Offensive Conditions Section 302.520 Regulation and Designation of Bioaccumulative Chemicals of Concern (BCCs) Section 302.521 Supplemental Antidegradation Provisions for BCCs Section 302.525 Radioactivity Section 302.530 Supplemental Mixing Provisions for Bioaccumulative Chemicals of Concern (BCCs) Section 302.535 Ammonia Nitrogen Section 302.540 Other Toxic Substances Section 302.545 Data Requirements Section 302.550 Analytical Testing Section 302.553 Determining the Lake Michigan Aquatic Toxicity Criteria or Values - General Procedures Section 302.555 Determining the Tier I Lake Michigan Acute Aquatic Toxicity Criterion (LMAATC): Independent of Water Chemistry Section 302.560 Determining the Tier I Lake Michigan Basin Acute Aquatic Life Toxicity Criterion (LMAATC): Dependent on Water Chemistry Section 302.563 Determining the Tier II Lake Michigan Basin Acute Aquatic Life Toxicity Value (LMAATV) Section 302.565 Determining the Lake Michigan Basin Chronic Aquatic Life Toxicity Criterion (LMCATC) or the Lake Michigan Basin Chronic Aquatic Life Toxicity Value (LMCATV) Section 302.570 Procedures for Deriving Bioaccumulation Factors for the Lake Michigan Basin Section 302.575 Procedures for Deriving Tier I Water Quality Criteria and Values in the Lake Michigan Basin to Protect Wildlife Section 302.580 Procedures for Deriving Water Quality Criteria and Values in the Lake Michigan Basin to Protect Human Health - General Section 302.585 Procedures for Determining the Lake Michigan Basin Human Health Threshold Criterion (LMHHTC) and the Lake Michigan Basin Human Health Threshold Value (LMHHTV) Section 302.590 Procedures for Determining the Lake Michigan Basin Human Health Nonthreshold Criterion (LMHHNC) or the Lake Michigan Basin Human Health Nonthreshold Value (LMHHNV) Section 302.595 Listing of Bioaccumulative Chemicals of Concern, Derived Criteria and Values SUBPART F: PROCEDURES FOR DETERMINING WATER QUALITY CRITERIA Section 302.601 Scope and Applicability Section 302.603 Definitions Section 302.604 Mathematical Abbreviations Section 302.606 Data Requirements Section 302.612 Determining the Acute Aquatic Toxicity Criterion for an Individual Substance - General Procedures Section 302.615 Determining the Acute Aquatic Toxicity Criterion – Toxicity Independent of Water Chemistry Section 302.618 Determining the Acute Aquatic Toxicity Criterion - Toxicity Dependent on Water Chemistry Section 302.621 Determining the Acute Aquatic Toxicity Criterion - Procedure for Combinations of Substances Section 302.627 Determining the Chronic Aquatic Toxicity Criterion for an Individual Substance - General Procedures Section 302.630 Determining the Chronic Aquatic Toxicity Criterion - Procedure for Combinations of Substances Section 302.633 The Wild and Domestic Animal Protection Criterion Section 302.642 The Human Threshold Criterion Section 302.645 Determining the Acceptable Daily Intake Section 302.648 Determining the Human Threshold Criterion Section 302.651 The Human Nonthreshold Criterion Section 302.654 Determining the Risk Associated Intake Section 302.657 Determining the Human Nonthreshold Criterion Section 302.658 Stream Flow for Application of Human Nonthreshold Criterion Section 302.660 Bioconcentration Factor Section 302.663 Determination of Bioconcentration Factors Section 302.666 Utilizing the Bioconcentration Factor Section 302.669 Listing of Derived Criteria Section 302.APPENDIX A References to Previous Rules (Repealed) Section 302.APPENDIX B Sources of Codified Sections (Repealed) Section 302.APPENDIX C Maximum total ammonia nitrogen concentrations allowable for certain combinations of pH and temperature Section 302.TABLE A pH-Dependent Values of the AS (Acute Standard) Section 302.TABLE B Temperature and pH-Dependent Values of the CS (Chronic Standard) for Fish Early Life Stages Absent Section 302.TABLE C Temperature and pH-Dependent Values of the CS (Chronic Standard) for Fish Early Life Stages Present Section 302.APPENDIX D Section 302.206(d): Stream Segments for Enhanced Dissolved Oxygen Protection

AUTHORITY: Implementing Section 13 and authorized by Sections 11(b) and 27 of the Environmental Protection Act [415 ILCS 5/13, 11(b), and 27].

SOURCE: Filed with the Secretary of State January 1, 1978; amended at 2 Ill. Reg. 44, p. 151, effective November 2, 1978; amended at 3 Ill. Reg. 20, p. 95, effective May 17, 1979; amended at 3 Ill. Reg. 25, p. 190, effective June 21, 1979; codified at 6 Ill. Reg. 7818; amended at 6 Ill. Reg. 11161, effective September 7, 1982; amended at 6 Ill. Reg. 13750, effective October 26, 1982; amended at 8 Ill. Reg. 1629, effective January 18, 1984; peremptory amendments at 10 Ill. Reg. 461, effective December 23, 1985; amended at R87-27 at 12 Ill. Reg. 9911, effective May 27, 1988; amended at R85-29 at 12 Ill. Reg. 12082, effective July 11, 1988; amended in R88-1 at 13 Ill. Reg. 5998, effective April 18, 1989; amended in R88-21(A) at 14 Ill. Reg. 2899, effective February 13, 1990; amended in R88-21(B) at 14 Ill. Reg. 11974, effective July 9, 1990; amended in R94-1(A) at 20 Ill. Reg. 7682, effective May 24, 1996; amended in R94-1(B) at 21 Ill. Reg. 370, effective December 23, 1996; expedited correction at 21 Ill. Reg. 6273, effective December 23, 1996; amended in R97-25 at 22 Ill. Reg. 1356, effective December 24, 1997; amended in R99-8 at 23 Ill. Reg. 11249, effective August 26, 1999; amended in R01-13 at 26 Ill. Reg. 3505, effective February 22, 2002; amended in R02-19 at 26 Ill. Reg. 16931, effective November 8, 2002; amended in R02-11 at 27 Ill. Reg. 166, effective December 20, 2002; amended in R04-21 at 30 Ill. Reg. 4919, effective March 1, 2006; amended in R04-25 at 32 Ill. Reg. 2254, effective January 28, 2008; amended in R07-9 at 32 Ill. Reg. 14978, effective September 8, 2008; amended in R11-18 at 36 Ill. Reg. 18871, effective December 12, 2012; amended in R11-18(B) at 37 Ill. Reg. 7493, effective May 16, 2013; amended in R08-09(D) at 39 Ill. Reg. 9388, effective July 1, 2015; amended in R18-23 at 47 Ill. Reg. 4437, effective March 23, 2023.