Illinois Administrative Code

Section 302.657 Determining the Human Nonthreshold Criterion The HNC is calculated according to the equation: HNC = RAI/[W + (F x BCF)] where: HNC = Human Nonthreshold Protection Criterion in milligrams per liter (mg/L); RAI = Risk Associated Intake of a substance in milligrams p…

Section 302.658 Stream Flow for Application of Human Nonthreshold Criterion The HNC applies at all times except during periods when flows are less than the harmonic mean flow (Qhm), as determined by: Qhm = N / SUM(1/Qi) Where: Qhm = harmonic mean flow, N = number of daily values …

Section 302.660 Bioconcentration Factor A Bioconcentration Factor is used to relate substance residue in aquatic organisms to the concentration of the substance in the waters in which the organisms reside. (Source: Added at 14 Ill. Reg. 2899, effective February 13, 1990)

Section 302.663 Determination of Bioconcentration Factors A Bioconcentration Factor equals the concentration of a substance in all or part of an aquatic organism in milligrams per kilogram of wet tissue weight (mg/kg), divided by the concentration of the substance in the water to…

Section 302.666 Utilizing the Bioconcentration Factor The Bioconcentration Factor derived in Section 302.663 is used to calculate water quality criteria for a substance as specified below: a) When calculating a WDAPC as described in Section 302.633, the geometric mean of all avai…

Section 302.669 Listing of Derived Criteria a) The Agency must develop and maintain a listing of toxicity criteria pursuant to this Subpart. This list must be made available to the public and updated whenever a new criterion is derived and must be published when updated in the Il…

Section 302.APPENDIX D Section 302.206(d): Stream Segments for Enhanced Dissolved Oxygen Protection BASIN NAME Segment Name Segment No. End Points Latitude Longitude COUNTY Illinois Aux Sable Creek 239 start 41.3982125891033 -88.3307365155966 GRUNDY end 41.5221610266554 -88.31530…

Section 302.TABLE B Temperature and pH-Dependent Values of the CS (Chronic Standard) for Fish Early Life Stages Absent pH Temperature, ˚Celsius 0-7 8 9 10 11 12 13 14 15 16 6 11.3 10.6 9.92 9.30 8.72 8.17 7.66 7.19 6.74 6.32 6.1 11.2 10.5 9.87 9.25 8.67 8.13 7.62 7.15 6.70 6.28 6…

Section 303.100 Scope and Applicability Part 303 contains water use designations that determine which set of Part 302 water quality standards apply for a given body of water. Part 303 also contains site-specific water quality standards. (Source: Amended at 47 Ill. Reg. 4575, effe…

Section 303.101 Multiple Designations Unless otherwise expressly stated, waters designated for specific uses must meet the most restrictive standards listed in 35 Ill. Adm. Code 302 for any specified use, in addition to meeting the general standards of Subpart B of 35 Ill. Adm. C…

Section 303.102 Rulemaking Required (Repealed) (Source: Repealed at 35 Ill. Reg. 15078, effective August 23, 2011) SUBPART B: NONSPECIFIC WATER USE DESIGNATIONS

Section 303.200 Scope and Applicability Subpart B contains general water use designations. These Sections, together with the specific designations of Subpart C, determine which set of water quality standards of 35 Ill. Adm. Code 302 applies to a given body of water. (Source: Amen…

Section 303.201 General Use Waters Except as otherwise specifically provided, all waters of the State must meet the general use standards of Subpart B of 35 Ill. Adm. Code 302. (Source: Amended at 47 Ill. Reg. 4575, effective March 23, 2023)

Section 303.202 Public and Food Processing Water Supplies Except as otherwise specifically provided and in addition to the general use standards of Subpart B of 35 Ill. Adm. Code 302, waters of the State must meet the public and food processing water supply standards of Subpart C…

Section 303.203 Underground Waters 35 Ill. Adm. Code 302.Subparts B and C do not apply to underground waters, except as provided at 35 Ill. Adm. Code 620.450(b). (Source: Amended at 16 Ill. Reg. 14684, effective September 10, 1992)

Section 303.204 Chicago Area Waterway System and Lower Des Plaines River The Chicago Area Waterway System and Lower Des Plaines River Waters are designated to protect for primary contact recreation, incidental contact or non-contact recreational uses (except where designated as n…

Section 303.205 Outstanding Resource Waters An Outstanding Resource Water (ORW) is a surface water body or water body segment that is of exceptional ecological or recreational significance and must be designated by the Board under 35 Ill. Adm. Code 102.Subpart H. a) Outstanding R…

Section 303.206 List of Outstanding Resource Waters The Board has not designated any Outstanding Resource Waters under 35 Ill. Adm. Code 102.Subpart H. (Source: Amended at 47 Ill. Reg. 4575, effective March 23, 2023)

Section 303.220 Primary Contact Recreation Waters The following waters are designated as Primary Contact Recreation Waters and must be protected for Primary Contact Recreation uses as defined in 35 Ill. Adm. Code 301.323. These waters must meet the numeric water quality standard …

Section 303.225 Incidental Contact Recreation Waters The following waters are designated as Incidental Contact Recreation Waters and must protect for incidental contact recreational uses as defined in 35 Ill. Adm. Code 301.282. a) Upper North Shore Channel from Wilmette Pumping S…

Section 303.227 Non-Contact Recreation Waters and Non-Recreational Waters a) Non-Contact Recreation. Calumet River from Lake Michigan to Torrence Avenue is designated as a Non-Contact Recreation Water and must protect for non-contact recreational uses as defined in 35 Ill. Adm. C…

Section 303.230 Upper Dresden Island Pool Aquatic Life Use Waters Upper Dresden Island Pool Aquatic Life Use Waters a) Lower Des Plaines River from the Brandon Road Lock and Dam to the Interstate 55 Bridge is designated as the Upper Dresden Island Pool Aquatic Life Use. These wat…

Section 303.235 Chicago Area Waterway System Aquatic Life Use A Waters a) Waters designated as Chicago Area Waterway System Aquatic Life Use A Waters are capable of maintaining, and must have quality sufficient to protect, aquatic-life populations predominated by individuals of t…

Section 303.240 Chicago Area Waterway System and Brandon Pool Aquatic Life Use B Waters a) Waters designated as Chicago Area Waterway System and Brandon Pool Aquatic Life Use B Waters are capable of maintaining, and must have quality sufficient to protect, aquatic life population…

Section 303.300 Scope and Applicability Subpart C contains specific use designations that determine which set of water quality standards of 35 Ill. Adm. Code 302 applies to a given water. In addition, Subpart C contains water quality standards applicable to specified waters. Nons…

Section 303.301 Organization Subpart C is arranged by river basin as follows: River Basin Reserved Section Numbers Ohio Section 303.310-Section 303.319 Wabash Section 303.320-Section 303.329 Mississippi North Section 303.330-Section 303.339 North Central Section 303.340-Section 3…

Section 303.311 Ohio River Temperature Instead of the standards of 35 Ill. Adm. Code 302.211(e) the water temperature at representative locations in the main river of the Ohio River must not exceed the maximum limits in the following table during more than 1% of the hours in the …

Section 303.312 Waters Receiving Fluorspar Mine Drainage (Repealed) (Source: Repealed at 36 Ill. Reg. 18898, effective December 12, 2012)

Section 303.321 Wabash River Temperature Instead of the standards of 35 Ill. Adm. Code 302.211(e), the water temperature at representative locations in the main river of the Wabash River and its interstate tributaries must not exceed the maximum limits in the following table duri…

Section 303.322 Unnamed Tributary of the Vermilion River (Repealed) (Source: Repealed at 47 Ill. Reg. 4575, effective March 23, 2023)

Section 303.323 Sugar Creek and Its Unnamed Tributary a) This Section applies only to Sugar Creek and its unnamed tributary from the point at which Marathon Oil Company's outfall 001 discharges into the unnamed tributary to the confluence of Sugar Creek and the Wabash River. b) 3…

Section 303.326 Unnamed Tributary of Salt Creek, Salt Creek, and Little Wabash River The fluoride general use water quality standard of 35 Ill. Adm. Code 302.208(g) does not apply to the waters of the State from the point of discharge of the POTW located at 903 E. Eichie Avenue i…

Section 303.331 Mississippi River North Temperature Instead of the standards of 35 Ill. Adm. Code 302.211(e) the water temperature at representative locations in the main river of the Mississippi River from the Wisconsin border to the Rock River must not exceed the maximum limits…

Section 303.341 Mississippi River North Central Temperature Instead of the standards of 35 Ill. Adm. Code 302.211(e), the water temperature at representative locations in the main river of the Mississippi River in the indicated locations must not exceed the maximum limits in the …

Section 303.351 Mississippi River South Central Temperature Instead of the standards of 35 Ill. Adm. Code 302.211(e), the water temperature at representative locations in the main river of the Mississippi River in the indicated locations must not exceed the maximum limits in the …

Section 303.352 Unnamed Tributary of Wood River Creek a) This section applies to the unnamed tributary of Wood River Creek that enters Wood River Creek 4700 feet above the confluence of Wood River Creek with the Mississippi River from a point 450 feet above the confluence of the …

Section 303.353 Schoenberger Creek; Unnamed Tributary of Cahokia Canal a) This rule applies to: 1) The final 1500 feet of Schoenberger Creek starting immediately south of the Baltimore and Ohio main tracks and running north to an unnamed tributary of the Cahokia Canal; and 2) The…

Section 303.361 Mississippi River South Temperature Instead of the standards of 35 Ill. Adm. Code 302.211(e), the water temperature at representative locations in the main river of the Mississippi River from the Kaskaskia River to the Ohio River must not exceed the maximum limits…

Section 303.400 Bankline Disposal Along the Illinois Waterway/River a) The U.S. Department of the Army, Corps of Engineers, may bankline dispose of sediment generated during maintenance dredging operations on the Illinois Waterway/River between river miles 80.2 and 291 if: 1) Les…

Section 303.410 Chronic Nickel Water Quality Standard for Segment of the Sangamon River The general use chronic water quality standard for dissolved nickel contained in 35 Ill. Adm. Code 302.208(e) does not apply to the segment of the Sangamon River that receives discharges from …

Section 303.430 Unnamed Tributary to Dutch Creek (Repealed) (Source: Repealed at 47 Ill. Reg. 4575, effective March 23, 2023)

Section 303.431 Long Point Slough and Its Unnamed Tributary (Repealed) (Source: Repealed at 47 Ill. Reg. 4575, effective March 23, 2023)

Section 303.441 Secondary Contact Waters (Repealed) (Source: Repealed at 35 Ill. Reg. 15078, effective August 23, 2011)

Section 303.442 Waters Not Designated for Public Water Supply The following waters are not required to meet the public and food processing water supply standards of 35 Ill. Adm. Code 302.Subpart C, even where designated as general use waters: a) The Chicago River b) The Little Ca…

Section 303.443 Lake Michigan Basin The waters of the Lake Michigan Basin must meet the Lake Michigan Basin water quality standards of 35 Ill. Adm. Code 302 Subpart E. Lake Michigan Basin waters under Illinois jurisdiction consist of the following: a) The Open Waters of Lake Mich…

Section 303.444 Salt Creek, Higgins Creek, West Branch of the DuPage River, Des Plaines River The General Use chronic water quality standard for cyanide in 35 Ill. Adm. Code 302.208 does not apply to Salt Creek, Higgins Creek, the West Branch of the DuPage River, and the Des Plai…

Section 303.445 Total Dissolved Solids Water Quality Standard for the Lower Des Plaines River (Repealed) (Source: Repealed at 47 Ill. Reg. 4575, effective March 23, 2023)