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Amerenenergy Medina Cogen LLC

Electric Services, Hutsonville, Illinois. NPDES permit IL0004120 expired May 31, 2025; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 002 form 0 quarterly, outfall 002 form S twice a year, outfall 003 form S twice a year, outfall 005 form S twice a year
Last report on file
July 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 10 reports late

Limits in force (158)

ParameterStatisticLimitMonthsOutfall
pHmonthly minimum≥ 6 SUall year002
pHmonthly minimum≥ 6 SUall year002
pHmonthly maximum≤ 9 SUall year002
pHmonthly maximum≤ 9 SUall year002
Solids, total suspended30-day average≤ 15 mg/Lall year002
Solids, total suspended30-day average≤ 15 mg/Lall year002
Solids, total suspendeddaily maximum≤ 30 mg/Lall year002
Solids, total suspendeddaily maximum≤ 30 mg/Lall year002
Oil & Greasedaily maximumreport only (mg/L)all year002
Oil & Greasedaily maximumreport only (mg/L)all year002
Cyanide, total [as CN]daily maximumreport only (ug/L)all year002
Cyanide, total [as CN]daily maximumreport only (ug/L)all year002
Cyanide, free [amenable to chlorination]daily maximumreport only (ug/L)all year002
Cyanide, free [amenable to chlorination]daily maximumreport only (ug/L)all year002
Chloride [as Cl]daily maximumreport only (mg/L)all year002
Chloride [as Cl]daily maximumreport only (mg/L)all year002
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year002
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year002
Fluoride, total [as F]daily maximumreport only (mg/L)all year002
Fluoride, total [as F]daily maximumreport only (mg/L)all year002
Arsenic, total [as As]daily maximumreport only (mg/L)all year002
Arsenic, total [as As]daily maximumreport only (mg/L)all year002
Barium, total [as Ba]daily maximumreport only (mg/L)all year002
Barium, total [as Ba]daily maximumreport only (mg/L)all year002
Boron, total [as B]daily maximumreport only (mg/L)all year002
Boron, total [as B]daily maximumreport only (mg/L)all year002
Cadmium, total [as Cd]daily maximumreport only (mg/L)all year002
Cadmium, total [as Cd]daily maximumreport only (mg/L)all year002
Chromium, hexavalent [as Cr]daily maximumreport only (mg/L)all year002
Chromium, hexavalent [as Cr]daily maximumreport only (mg/L)all year002
Chromium, total [as Cr]daily maximumreport only (mg/L)all year002
Chromium, total [as Cr]daily maximumreport only (mg/L)all year002
Copper, total [as Cu]daily maximumreport only (mg/L)all year002
Copper, total [as Cu]daily maximumreport only (mg/L)all year002
Iron, total [as Fe]daily maximumreport only (mg/L)all year002
Iron, total [as Fe]daily maximumreport only (mg/L)all year002
Iron, dissolved [as Fe]daily maximumreport only (mg/L)all year002
Iron, dissolved [as Fe]daily maximumreport only (mg/L)all year002
Lead, total [as Pb]daily maximumreport only (mg/L)all year002
Lead, total [as Pb]daily maximumreport only (mg/L)all year002
Manganese, total [as Mn]daily maximumreport only (mg/L)all year002
Manganese, total [as Mn]daily maximumreport only (mg/L)all year002
Nickel, total [as Ni]daily maximumreport only (mg/L)all year002
Nickel, total [as Ni]daily maximumreport only (mg/L)all year002
Nickel, total [as Ni]daily maximumreport only (mg/L)all year002
Nickel, total [as Ni]daily maximumreport only (mg/L)all year002
Silver, total [as Ag]daily maximumreport only (mg/L)all year002
Silver, total [as Ag]daily maximumreport only (mg/L)all year002
Zinc, total [as Zn]daily maximumreport only (mg/L)all year002
Zinc, total [as Zn]daily maximumreport only (mg/L)all year002
Zinc, total [as Zn]daily maximumreport only (mg/L)all year002
Zinc, total [as Zn]daily maximumreport only (mg/L)all year002
Selenium, total [as Se]daily maximumreport only (mg/L)all year002
Selenium, total [as Se]daily maximumreport only (mg/L)all year002
Oil and grease30-day average≤ 15 mg/Lall year002
Oil and grease30-day average≤ 15 mg/Lall year002
Oil and greasedaily maximum≤ 20 mg/Lall year002
Oil and greasedaily maximum≤ 20 mg/Lall year002
Phenolics, total recoverabledaily maximumreport only (mg/L)all year002
Phenolics, total recoverabledaily maximumreport only (mg/L)all year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Mercury, total [as Hg]daily maximumreport only (ng/L)all year002
Mercury, total [as Hg]daily maximumreport only (ng/L)all year002
Oil & Greasedaily maximumreport only (mg/L)all year003
Oil & Greasedaily maximumreport only (mg/L)all year003
Cyanide, total [as CN]daily maximumreport only (ug/L)all year003
Cyanide, total [as CN]daily maximumreport only (ug/L)all year003
Cyanide, free [amenable to chlorination]daily maximumreport only (ug/L)all year003
Cyanide, free [amenable to chlorination]daily maximumreport only (ug/L)all year003
Chloride [as Cl]daily maximumreport only (mg/L)all year003
Chloride [as Cl]daily maximumreport only (mg/L)all year003
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year003
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year003
Fluoride, total [as F]daily maximumreport only (mg/L)all year003
Fluoride, total [as F]daily maximumreport only (mg/L)all year003
Arsenic, total [as As]daily maximumreport only (mg/L)all year003
Arsenic, total [as As]daily maximumreport only (mg/L)all year003
Barium, total [as Ba]daily maximumreport only (mg/L)all year003
Barium, total [as Ba]daily maximumreport only (mg/L)all year003
Boron, total [as B]daily maximumreport only (mg/L)all year003
Boron, total [as B]daily maximumreport only (mg/L)all year003
Cadmium, total [as Cd]daily maximumreport only (mg/L)all year003
Cadmium, total [as Cd]daily maximumreport only (mg/L)all year003
Chromium, hexavalent [as Cr]daily maximumreport only (mg/L)all year003
Chromium, hexavalent [as Cr]daily maximumreport only (mg/L)all year003
Chromium, total [as Cr]daily maximumreport only (mg/L)all year003
Chromium, total [as Cr]daily maximumreport only (mg/L)all year003
Copper, total [as Cu]daily maximumreport only (mg/L)all year003
Copper, total [as Cu]daily maximumreport only (mg/L)all year003
Iron, total [as Fe]daily maximumreport only (mg/L)all year003
Iron, total [as Fe]daily maximumreport only (mg/L)all year003
Iron, dissolved [as Fe]daily maximumreport only (mg/L)all year003
Iron, dissolved [as Fe]daily maximumreport only (mg/L)all year003
Lead, total [as Pb]daily maximumreport only (mg/L)all year003
Lead, total [as Pb]daily maximumreport only (mg/L)all year003
Manganese, total [as Mn]daily maximumreport only (mg/L)all year003
Manganese, total [as Mn]daily maximumreport only (mg/L)all year003
Nickel, total [as Ni]daily maximumreport only (mg/L)all year003
Nickel, total [as Ni]daily maximumreport only (mg/L)all year003
Silver, total [as Ag]daily maximumreport only (mg/L)all year003
Silver, total [as Ag]daily maximumreport only (mg/L)all year003
Zinc, total [as Zn]daily maximumreport only (mg/L)all year003
Zinc, total [as Zn]daily maximumreport only (mg/L)all year003
Selenium, total [as Se]daily maximumreport only (mg/L)all year003
Selenium, total [as Se]daily maximumreport only (mg/L)all year003
Phenolics, total recoverabledaily maximumreport only (mg/L)all year003
Phenolics, total recoverabledaily maximumreport only (mg/L)all year003
Mercury, total [as Hg]daily maximumreport only (ng/L)all year003
Mercury, total [as Hg]daily maximumreport only (ng/L)all year003
Oil & Greasedaily maximumreport only (mg/L)all year005
Oil & Greasedaily maximumreport only (mg/L)all year005
Cyanide, total [as CN]daily maximumreport only (ug/L)all year005
Cyanide, total [as CN]daily maximumreport only (ug/L)all year005
Cyanide, free [amenable to chlorination]daily maximumreport only (ug/L)all year005
Cyanide, free [amenable to chlorination]daily maximumreport only (ug/L)all year005
Chloride [as Cl]daily maximumreport only (mg/L)all year005
Chloride [as Cl]daily maximumreport only (mg/L)all year005
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year005
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year005
Fluoride, total [as F]daily maximumreport only (mg/L)all year005
Fluoride, total [as F]daily maximumreport only (mg/L)all year005
Arsenic, total [as As]daily maximumreport only (mg/L)all year005
Arsenic, total [as As]daily maximumreport only (mg/L)all year005
Barium, total [as Ba]daily maximumreport only (mg/L)all year005
Barium, total [as Ba]daily maximumreport only (mg/L)all year005
Boron, total [as B]daily maximumreport only (mg/L)all year005
Boron, total [as B]daily maximumreport only (mg/L)all year005
Cadmium, total [as Cd]daily maximumreport only (mg/L)all year005
Cadmium, total [as Cd]daily maximumreport only (mg/L)all year005
Chromium, hexavalent [as Cr]daily maximumreport only (mg/L)all year005
Chromium, hexavalent [as Cr]daily maximumreport only (mg/L)all year005
Chromium, total [as Cr]daily maximumreport only (mg/L)all year005
Chromium, total [as Cr]daily maximumreport only (mg/L)all year005
Copper, total [as Cu]daily maximumreport only (mg/L)all year005
Copper, total [as Cu]daily maximumreport only (mg/L)all year005
Iron, total [as Fe]daily maximumreport only (mg/L)all year005
Iron, total [as Fe]daily maximumreport only (mg/L)all year005
Iron, dissolved [as Fe]daily maximumreport only (mg/L)all year005
Iron, dissolved [as Fe]daily maximumreport only (mg/L)all year005
Lead, total [as Pb]daily maximumreport only (mg/L)all year005
Lead, total [as Pb]daily maximumreport only (mg/L)all year005
Manganese, total [as Mn]daily maximumreport only (mg/L)all year005
Manganese, total [as Mn]daily maximumreport only (mg/L)all year005
Nickel, total [as Ni]daily maximumreport only (mg/L)all year005
Nickel, total [as Ni]daily maximumreport only (mg/L)all year005
Silver, total [as Ag]daily maximumreport only (mg/L)all year005
Silver, total [as Ag]daily maximumreport only (mg/L)all year005
Zinc, total [as Zn]daily maximumreport only (mg/L)all year005
Zinc, total [as Zn]daily maximumreport only (mg/L)all year005
Selenium, total [as Se]daily maximumreport only (mg/L)all year005
Selenium, total [as Se]daily maximumreport only (mg/L)all year005
Phenolics, total recoverabledaily maximumreport only (mg/L)all year005
Phenolics, total recoverabledaily maximumreport only (mg/L)all year005
Mercury, total [as Hg]daily maximumreport only (ng/L)all year005
Mercury, total [as Hg]daily maximumreport only (ng/L)all year005

How strict are these limits?

Cited limits by parameter: Illinois's rules and the federal ones.

Same industry: the 45 Electric Services permits in Illinois.

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Your permit document is the final word. As JSON: /api/v1/permits/IL0004120 · MCP: https://passage-data.com/mcp