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Midwest Generation LLC

Electric Services, major discharger, Pekin, Illinois. NPDES permit IL0002232 expired Aug 31, 2026; 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 001 form 0 monthly (8 values), outfall 002 form 0 monthly (5 values), outfall 004 form 0 monthly (13 values), outfall A01 form 0 monthly (10 values), outfall A02 form 0 monthly (6 values), outfall B02 form 0 monthly (6 values), and 1 more form
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 84 reports late

Limits in force (50)

ParameterStatisticLimitMonthsOutfall
pHmonthly minimum≥ 6 SUall year001
pHmonthly maximum≤ 9 SUall year001
Solids, total suspended30-day average≤ 15 mg/Lall year001
Solids, total suspendeddaily maximum≤ 30 mg/Lall year001
Oil and grease30-day average≤ 15 mg/Lall year001
Oil and greasedaily maximum≤ 20 mg/Lall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Temperature, water deg. fahrenheitmonthly maximumreport only (deg F)all year002
pHmonthly minimum≥ 6.5 SUall year002
pHmonthly maximum≤ 9 SUall 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
BOD, 5-day, 20 deg. C30-day average≤ 30 mg/Lall year004
BOD, 5-day, 20 deg. Cdaily maximum≤ 60 mg/Lall year004
BOD, 5-day, 20 deg. C30-day average≤ 10 lb/dall year004
BOD, 5-day, 20 deg. Cdaily maximum≤ 20 lb/dall year004
pHmonthly minimum≥ 6 SUall year004
pHmonthly maximum≤ 9 SUall year004
Solids, total suspended30-day average≤ 30 mg/Lall year004
Solids, total suspendeddaily maximum≤ 60 mg/Lall year004
Solids, total suspended30-day average≤ 10 lb/dall year004
Solids, total suspendeddaily maximum≤ 20 lb/dall year004
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year004
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year004
Chlorine, total residualdaily maximum≤ .05 mg/Lall year004
Solids, total suspended30-day average≤ 30 mg/Lall yearA01
Solids, total suspendeddaily maximum≤ 100 mg/Lall yearA01
Copper, total [as Cu]30-day average≤ .5 mg/Lall yearA01
Copper, total [as Cu]daily maximum≤ 1 mg/Lall yearA01
Iron, total [as Fe]30-day average≤ 1 mg/Lall yearA01
Iron, total [as Fe]daily maximum≤ 1 mg/Lall yearA01
Oil and grease30-day average≤ 15 mg/Lall yearA01
Oil and greasedaily maximum≤ 20 mg/Lall yearA01
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearA01
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearA01
Solids, total suspended30-day average≤ 15 mg/Lall yearA02
Solids, total suspendeddaily maximum≤ 30 mg/Lall yearA02
Oil and grease30-day average≤ 15 mg/Lall yearA02
Oil and greasedaily maximum≤ 20 mg/Lall yearA02
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearA02
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearA02
Solids, total suspended30-day average≤ 15 mg/Lall yearB02
Solids, total suspendeddaily maximum≤ 30 mg/Lall yearB02
Oil and grease30-day average≤ 15 mg/Lall yearB02
Oil and greasedaily maximum≤ 20 mg/Lall yearB02
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearB02
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearB02
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearINT
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearINT

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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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IL0002232 · MCP: https://passage-data.com/mcp