Table 1. Waters and Impairments Approved on Illinois' 2018 303(D)

Table 1 Waters and Impairments Approved on Illinois 1 of 133 of Illinois 2018 Decison Document 2018 303(d) List Title Corrected 3/24/2021 CWA303D ASSESSMENT ASSESSMENT WATER PARAMETER WATER TYPE NAME UNITS PARAMETER NAME USE PRIORITY UNIT ID UNIT NAME SIZE ATTAINMENT RANKING GREAT LAKES BAYS Square POLYCHLORINATED Not meeting IL_3S Calumet Harbor 2.4 Fish Consumption Low AND HARBORS Miles BIPHENYLS (PCBS) criteria GREAT LAKES BAYS Square Not meeting IL_3S Calumet Harbor 2.4 MERCURY Fish Consumption Low AND HARBORS Miles criteria Primary Contact Not meeting IL_A-848-849 Ohio River STREAM 1.11 Miles FECAL COLIFORM Medium Recreation criteria Not meeting IL_A-848-849 Ohio River STREAM 1.11 Miles MERCURY Fish Consumption Medium threshold POLYCHLORINATED Not meeting IL_A-848-849 Ohio River STREAM 1.11 Miles Fish Consumption Medium BIPHENYLS (PCBS) threshold DIOXIN (INCLUDING 2,3,7,8- Not meeting IL_A-848-849 Ohio River STREAM 1.11 Miles Fish Consumption Medium TCDD) threshold POLYCHLORINATED Not meeting IL_A-849-862 Ohio River STREAM 12.68 Miles Fish Consumption Medium BIPHENYLS (PCBS) threshold Not meeting IL_A-849-862 Ohio River STREAM 12.68 Miles MERCURY Fish Consumption Medium threshold Primary Contact Not meeting IL_A-849-862 Ohio River STREAM 12.68 Miles FECAL COLIFORM Medium Recreation criteria DIOXIN (INCLUDING 2,3,7,8- Not meeting IL_A-849-862 Ohio River STREAM 12.68 Miles Fish Consumption Medium TCDD) threshold POLYCHLORINATED Not meeting IL_A-862-873 Ohio River STREAM 11.24 Miles Fish Consumption Medium BIPHENYLS (PCBS) threshold Primary Contact Not meeting IL_A-862-873 Ohio River STREAM 11.24 Miles FECAL COLIFORM Medium Recreation criteria Not meeting IL_A-862-873 Ohio River STREAM 11.24 Miles MERCURY Fish Consumption Medium threshold DIOXIN (INCLUDING 2,3,7,8- Not meeting IL_A-862-873 Ohio River STREAM 11.24 Miles Fish Consumption Medium TCDD) threshold Not meeting IL_A-873-894 Ohio River STREAM 19.74 Miles MERCURY Fish Consumption Medium threshold POLYCHLORINATED Not meeting IL_A-873-894 Ohio River STREAM 19.74 Miles Fish Consumption Medium BIPHENYLS (PCBS) threshold DIOXIN (INCLUDING 2,3,7,8- Not meeting IL_A-873-894 Ohio River STREAM 19.74 Miles Fish Consumption Medium TCDD) threshold Primary Contact Not meeting IL_A-873-894 Ohio River STREAM 19.74 Miles FECAL COLIFORM Medium Recreation criteria POLYCHLORINATED Not meeting IL_A-894-910 Ohio River STREAM 16.08 Miles Fish Consumption Medium BIPHENYLS (PCBS) threshold Primary Contact Not meeting IL_A-894-910 Ohio River STREAM 16.08 Miles FECAL COLIFORM Low Recreation criteria Not meeting IL_A-894-910 Ohio River STREAM 16.08 Miles MERCURY Fish Consumption Medium threshold Table 1 Waters and Impairments Approved on Illinois 2 of 133 of Illinois 2018 Decison Document 2018 303(d) List 3/4/2021 CWA303D ASSESSMENT ASSESSMENT WATER PARAMETER WATER TYPE NAME UNITS PARAMETER NAME USE PRIORITY UNIT ID UNIT NAME SIZE ATTAINMENT RANKING DIOXIN (INCLUDING 2,3,7,8- Not meeting IL_A-894-910 Ohio River STREAM 16.08 Miles Fish Consumption Medium TCDD) threshold POLYCHLORINATED Not meeting IL_A-910-920 Ohio River STREAM 10.22 Miles Fish Consumption Medium BIPHENYLS (PCBS) threshold DIOXIN (INCLUDING 2,3,7,8- Not meeting IL_A-910-920 Ohio River STREAM 10.22 Miles Fish Consumption Medium TCDD) threshold Not meeting IL_A-910-920 Ohio River STREAM 10.22 Miles MERCURY Fish Consumption Medium threshold Primary Contact Not meeting IL_A-920-981 Ohio River STREAM 60.13 Miles FECAL COLIFORM Medium Recreation criteria DIOXIN (INCLUDING 2,3,7,8- Not meeting IL_A-920-981 Ohio River STREAM 60.13 Miles Fish Consumption Medium TCDD) threshold POLYCHLORINATED Not meeting IL_A-920-981 Ohio River STREAM 60.13 Miles Fish Consumption Medium BIPHENYLS (PCBS) threshold Not meeting IL_A-920-981 Ohio River STREAM 60.13 Miles MERCURY Fish Consumption Medium threshold Not meeting IL_AD-02 Cache River STREAM 7.55 Miles DISSOLVED OXYGEN Aquatic Life Medium threshold Not meeting IL_AD-02 Cache River STREAM 7.55 Miles MERCURY Fish Consumption Medium threshold Not meeting IL_AD-02 Cache River STREAM 7.55 Miles PH Aquatic Life Medium threshold Not meeting IL_AD-02 Cache River STREAM 7.55 Miles IRON Aquatic Life Medium threshold Not meeting IL_AD-04 Cache River STREAM 22.33 Miles MERCURY Fish Consumption Medium threshold Not meeting IL_AD-05 Cache River STREAM 11.16 Miles MERCURY Fish Consumption Medium threshold Not meeting IL_AD-06 Cache River STREAM 6.55 Miles MERCURY Fish Consumption Medium threshold Not meeting IL_AD-09 Post Creek Cutoff STREAM 5.22 Miles MERCURY Fish Consumption Medium threshold Not meeting IL_AD-11 Cache River STREAM 6.55 Miles MERCURY Fish Consumption Medium threshold Not meeting IL_ADC-01 Main Ditch STREAM 8.68 Miles DISSOLVED OXYGEN Aquatic Life Medium criteria Not meeting IL_ADCA Clifty Creek STREAM 8.01 Miles DISSOLVED OXYGEN Aquatic Life Medium threshold New Columbia Not meeting IL_ADCD-01 STREAM 10.12 Miles DISSOLVED OXYGEN Aquatic Life Medium Ditch threshold Not meeting IL_ADCDA Bear Creek STREAM 14.16 Miles PH Aquatic Life Medium criteria Not meeting IL_ADCDA Bear Creek STREAM 14.16 Miles DISSOLVED OXYGEN Aquatic Life Medium criteria Table 1 Waters and Impairments Approved on Illinois 3 of 133 of Illinois 2018 Decison Document 2018 303(d) List 3/4/2021 CWA303D ASSESSMENT ASSESSMENT WATER PARAMETER WATER TYPE NAME UNITS PARAMETER NAME USE PRIORITY UNIT ID UNIT NAME SIZE ATTAINMENT RANKING Not meeting IL_ADCF Tucker Ditch STREAM 5.97 Miles DISSOLVED OXYGEN Aquatic Life Medium threshold Not meeting IL_ADD-01 Dutchman Creek STREAM 5.11 Miles DISSOLVED OXYGEN Aquatic Life Medium threshold Not meeting IL_ADD-01 Dutchman Creek STREAM 5.11 Miles PH Aquatic Life Medium threshold Not meeting IL_ADD-05 Dutchman Creek STREAM 4.7 Miles PH Aquatic Life Medium criteria Not meeting IL_ADDA Cave Creek STREAM 7.21 Miles DISSOLVED OXYGEN Aquatic Life Medium criteria Not meeting IL_ADX-01 Cache Creek STREAM 3.01 Miles PHOSPHORUS, TOTAL Aquatic Life Medium threshold Not meeting IL_ADY-01 Cache River STREAM 3.92 Miles MERCURY Fish Consumption Medium threshold Not meeting IL_ADY-01 Cache River STREAM 3.92 Miles DISSOLVED OXYGEN Aquatic Life Medium criteria Not meeting IL_ADY-01 Cache River STREAM 3.92 Miles IRON Aquatic Life Medium threshold Not meeting IL_AE Massac Creek STREAM 16.53 Miles DISSOLVED OXYGEN Aquatic Life Medium criteria Not meeting IL_AEA Weaver Creek STREAM 5.78 Miles DISSOLVED OXYGEN Aquatic Life Medium criteria Not meeting IL_AH Dog Creek STREAM 9.93 Miles DISSOLVED OXYGEN Aquatic Life Medium criteria SEDIMENTATION/SILTATIO Not meeting IL_AJF-02 Cedar Creek STREAM 1.95 Miles Aquatic Life Medium N threshold Not meeting IL_AJF-02 Cedar Creek STREAM 1.95 Miles MANGANESE Aquatic Life Medium criteria Not meeting IL_AJF-02 Cedar Creek STREAM 1.95 Miles DISSOLVED OXYGEN Aquatic Life Low criteria Not meeting IL_AJF-16 Cedar Creek STREAM 10.98 Miles PH Aquatic Life Medium threshold Not meeting IL_AJFA-21 Max Creek STREAM 10.88 Miles DISSOLVED OXYGEN Aquatic Life Medium threshold Not meeting IL_AJG-18 Hayes Creek STREAM 15.08 Miles DISSOLVED OXYGEN Aquatic Life Medium criteria Not meeting IL_AJG-18 Hayes Creek STREAM 15.08 Miles PH Aquatic Life Medium threshold Not meeting IL_AK-02 Lusk Creek STREAM 7.8 Miles MERCURY Fish Consumption Medium threshold Not meeting IL_AK-04 Lusk Creek STREAM 12.96 Miles MERCURY Fish Consumption Medium threshold Not meeting IL_AK-07 Lusk Creek STREAM 11.32 Miles MERCURY Fish Consumption Medium threshold Table 1 Waters and Impairments Approved on Illinois 4 of 133 of Illinois 2018 Decison Document 2018 303(d) List 3/4/2021 CWA303D ASSESSMENT ASSESSMENT WATER PARAMETER WATER TYPE NAME UNITS PARAMETER NAME USE PRIORITY UNIT ID UNIT NAME SIZE ATTAINMENT RANKING Big Grand Pierre Not meeting IL_AL-01 STREAM 16.2 Miles MERCURY Fish Consumption Medium Creek threshold Not meeting IL_AO-02 Big Creek STREAM 9.55 Miles MERCURY Fish Consumption Medium threshold Not meeting IL_AO-03 Big Creek STREAM 9.2 Miles MERCURY Fish Consumption Medium threshold Not meeting IL_AP Hosick Creek STREAM 4.05 Miles DISSOLVED OXYGEN Aquatic Life Medium threshold Not meeting IL_AQ Peters Creek STREAM 9.67 Miles CAUSE UNKNOWN Aquatic Life Medium threshold Not meeting IL_AR Haney Creek STREAM 12.68 Miles DISSOLVED OXYGEN Aquatic Life Medium threshold Not meeting IL_AT-05 Saline River STREAM 9.6 Miles MERCURY Fish Consumption Medium threshold Not meeting IL_AT-05 Saline River STREAM 9.6 Miles BOTTOM DEPOSITS Aesthetic Quality Medium criteria Not meeting IL_AT-05 Saline River STREAM 9.6 Miles DISSOLVED OXYGEN Aquatic Life Medium criteria Not meeting IL_AT-06 Saline River STREAM 10.44 Miles IRON Aquatic Life Medium threshold Not meeting IL_AT-06 Saline River STREAM 10.44 Miles DISSOLVED OXYGEN Aquatic Life Medium criteria Not meeting IL_AT-06 Saline River STREAM 10.44 Miles MERCURY Fish Consumption Medium threshold Primary Contact Not meeting IL_AT-06 Saline River STREAM 10.44 Miles FECAL COLIFORM Medium Recreation criteria Not meeting IL_AT-07 Saline River STREAM 7.23 Miles PHOSPHORUS, TOTAL Aquatic Life Medium threshold SEDIMENTATION/SILTATIO Not meeting IL_AT-07 Saline River STREAM 7.23 Miles Aquatic Life Medium N threshold Not meeting IL_AT-07 Saline River STREAM 7.23 Miles DISSOLVED OXYGEN Aquatic Life Medium criteria TOTAL SUSPENDED Not meeting IL_AT-07 Saline River STREAM 7.23 Miles Aquatic Life Medium SOLIDS (TSS) threshold Not meeting IL_AT-07 Saline River STREAM 7.23 Miles MERCURY Fish Consumption Medium threshold Not meeting IL_ATB Harris Creek STREAM 13.01 Miles DISSOLVED OXYGEN Aquatic Life

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