TITLE 35: ENVIRONMENTAL PROTECTION SUBTITLE C: WATER POLLUTION CHAPTER I: POLLUTION CONTROL BOARD PART 304 EFFLUENT 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 EFFLUENT STANDARDS Section 304.101 Preamble Section 304.102 Dilution Section 304.103 Background Concentrations Section 304.104 Averaging Section 304.105 Violation of Water Quality Standards Section 304.106 Offensive Discharges Section 304.120 Deoxygenating Wastes Section 304.121 Bacteria Section 304.122 Total Ammonia Nitrogen Section 304.123 Phosphorus Section 304.124 Additional Contaminants Section 304.125 pH Section 304.126 Mercury Section 304.140 Delays in Upgrading (Repealed) Section 304.141 NPDES Effluent Standards Section 304.142 New Source Performance Standards (Repealed) SUBPART B: SITE SPECIFIC RULES AND EXCEPTIONS NOT OF GENERAL APPLICABILITY Section 304.201 Wastewater Treatment Plant Discharges of The Metropolitan Water Reclamation District of Greater Chicago Section 304.202 Chlor-alkali Mercury Discharges in St. Clair County Section 304.203 Copper Discharges by Olin Corporation Section 304.204 Schoenberger Creek: Groundwater Discharges Section 304.205 John Deere Foundry Discharges (Repealed) Section 304.206 Alton Water Company Treatment Plant Discharges Section 304.207 Galesburg Sanitary District Deoxygenating Wastes Discharges Section 304.208 City of Lockport Treatment Plant Discharges Section 304.209 Wood River Station Total Suspended Solids Discharges Section 304.210 Alton Wastewater Treatment Plant Discharges Section 304.211 Discharges From Borden Chemicals and Plastics Operating Limited Partnership Into an Unnamed Tributary of Long Point Slough (Repealed) Section 304.212 Sanitary District of Decatur Discharges Section 304.213 PDV Midwest Refining, L.L.C. Refinery Ammonia Discharge (Repealed) Section 304.214 Mobil Oil Refinery Ammonia Discharge (Repealed) Section 304.215 City of Tuscola Wastewater Treatment Facility Discharges Section 304.216 Newton Station Suspended Solids Discharges Section 304.218 City of Pana Phosphorus Discharge Section 304.219 North Shore Water Reclamation District Phosphorus Discharges Section 304.220 East St. Louis Treatment Facility, Illinois-American Water Company (Repealed) Section 304.221 Ringwood Drive Manufacturing Facility in McHenry County Section 304.222 Intermittent Discharge of TRC Section 304.224 Effluent Disinfection SUBPART C: TEMPORARY EFFLUENT STANDARDS Section 304.301 Exception for Ammonia Nitrogen Water Quality Violations (Repealed) Section 304.302 City of Joliet East Side Wastewater Treatment Plant (Repealed) Section 304.303 Amerock Corporation, Rockford Facility (Repealed) Section 304.APPENDIX A Reference to Previous Rules (Repealed)

AUTHORITY: Implementing Section 13 and authorized by Section 27 of the Environmental Protection Act [415 ILCS 5/13 and 27].

SOURCE: Filed with the Secretary of State January 1, 1978; amended at 2 Ill. Reg. 30, p. 343, effective July 27, 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; amended at 4 Ill. Reg. 20, p. 53, effective May 7, 1980; amended at 6 Ill. Reg. 563, effective December 24, 1981; 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 7 Ill. Reg. 3020, effective March 4, 1983; amended at 7 Ill. Reg. 8111, effective June 23, 1983; amended at 7 Ill. Reg. 14515, effective October 14, 1983; amended at 7 Ill. Reg. 14910, effective November 14, 1983; amended at 8 Ill. Reg. 1600, effective January 18, 1984; amended at 8 Ill. Reg. 3687, effective March 14, 1984; amended at 8 Ill. Reg. 8237, effective June 8, 1984; amended at 9 Ill. Reg. 1379, effective January 21, 1985; amended at 9 Ill. Reg. 4510, effective March 22, 1985; peremptory amendment at 10 Ill. Reg. 456, effective December 23, 1985; amended at 11 Ill. Reg. 3117, effective January 28, 1987; amended in R84-13 at 11 Ill. Reg. 7291, effective April 3, 1987; amended in R86-17(A) at 11 Ill. Reg. 14748, effective August 24, 1987; amended in R84-16 at 12 Ill. Reg. 2445, effective January 15, 1988; amended in R83-23 at 12 Ill. Reg. 8658, effective May 10, 1988; amended in R87-27 at 12 Ill. Reg. 9905, effective May 27, 1988; amended in R82-7 at 12 Ill. Reg. 10712, effective June 9, 1988; amended in R85-29 at 12 Ill. Reg. 12064, effective July 12, 1988; amended in R87-22 at 12 Ill. Reg. 13966, effective August 23, 1988; amended in R86-3 at 12 Ill. Reg. 20126, effective November 16, 1988; amended in R84-20 at 13 Ill. Reg. 851, effective January 9, 1989; amended in R85-11 at 13 Ill. Reg. 2060, effective February 6, 1989; amended in R88-1 at 13 Ill. Reg. 5976, effective April 18, 1989; amended in R86-17(B) at 13 Ill. Reg. 7754, effective May 4, 1989; amended in R88-22 at 13 Ill. Reg. 8880, effective May 26, 1989; amended in R87-6 at 14 Ill. Reg. 6777, effective April 24, 1990; amended in R87-36 at 14 Ill. Reg. 9437, effective May 31, 1990; amended in R88-21(B) at 14 Ill. Reg. 12538, effective July 18, 1990; amended in R84-44 at 14 Ill. Reg. 20719, effective December 11, 1990; amended in R86-14 at 15 Ill. Reg. 241, effective December 18, 1990; amended in R93-8 at 18 Ill. Reg. 267, effective December 23, 1993; amended in R87-33 at 18 Ill. Reg. 11574, effective July 7, 1994; amended in R95-14 at 20 Ill. Reg. 3528, effective February 8, 1996; amended in R94-1(B) at 21 Ill. Reg. 364, effective December 23, 1996; expedited correction in R94-1(B) at 21 Ill. Reg. 6269, effective December 23, 1996; amended in R97-25 at 22 Ill. Reg. 1351, effective December 24, 1997; amended in R97-28 at 22 Ill. Reg. 3512, effective February 3, 1998; amended in R98-14 at 23 Ill. Reg. 687, effective December 31, 1998; amended in R02-19 at 26 Ill. Reg. 16948, effective November 8, 2002; amended in R02-11 at 27 Ill. Reg. 194, effective December 20, 2002; amended in R04-26 at 30 Ill. Reg. 2365, effective February 2, 2006; amended in R08-9B at 36 Ill. Reg. 2586, effective February 2, 2012; amended in R13-20 at 38 Ill. Reg. 6107, effective February 26, 2014; amended in R18-23 at 47 Ill. Reg. 4601, effective March 23, 2023.