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Midwest Generation, LLC

Electric Services, Morris, Illinois. NPDES permit IL0048143, in force until Apr 30, 2031. 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 (4 values), outfall B01 form 0 monthly (8 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 24 reports late

Limits in force (12)

ParameterStatisticLimitMonthsOutfall
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily minimumreport only (MGD)all year001
Flowvaluereport only (#/mo)all year001
pHmonthly minimum≥ 6 SUall yearB01
pHmonthly maximum≤ 9 SUall yearB01
Solids, total suspended30-day average≤ 15 mg/Lall yearB01
Solids, total suspendeddaily maximum≤ 30 mg/Lall yearB01
Oil and grease30-day average≤ 15 mg/Lall yearB01
Oil and greasedaily maximum≤ 20 mg/Lall yearB01
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearB01
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearB01

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/IL0048143 · MCP: https://passage-data.com/mcp