MIDWEST GENERATION LLC

NPDES permit IL0002208 · Major NON-POTW · effective, expires 2026-11-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
0of 60 forms filed late

Last period with anything received: 2026-08-31.

Reporting

Reports are due about 25 days after each monitoring period ends (the most common figure among IL permits in EPA's filings — check your permit).

Limits in force (45)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitDAILY MX <= 73 deg F Jan, Feb
001Temperature, water deg. fahrenheitDAILY MX <= 78 deg F Mar, Dec
001Temperature, water deg. fahrenheitDAILY MX <= 83 deg F Apr
001Temperature, water deg. fahrenheitDAILY MX <= 88 deg F May, Nov
001Temperature, water deg. fahrenheitDAILY MX <= 96 deg F Jun, Jul, Aug, Sep
001Temperature, water deg. fahrenheitDAILY MX <= 93 deg F Oct
001pHMO MIN >= 6 SU all year
001pHMO MAX <= 9 SU all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Chlorine, total residualDAILY MX <= .05 mg/L all year
001Month excursion time [min]YA <= 438 hr/mo all year
002pHMO MIN >= 6 SU all year
002pHMO MAX <= 9 SU all year
002Solids, total suspended30DA AVG <= 15 mg/L all year
002Solids, total suspendedDAILY MX <= 30 mg/L all year
002Oil & Grease30DA AVG <= 15 mg/L all year
002Oil & GreaseDAILY MX <= 20 mg/L all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
003BOD, 5-day, 20 deg. C30DA AVG <= 30 mg/L all year
003BOD, 5-day, 20 deg. CDAILY MX <= 60 mg/L all year
003BOD, 5-day, 20 deg. C30DA AVG <= 3.7 lb/d all year
003BOD, 5-day, 20 deg. CDAILY MX <= 18 lb/d all year
003pHMO MIN >= 6 SU all year
003pHMO MAX <= 9 SU all year
003Solids, total suspended30DA AVG <= 30 mg/L all year
003Solids, total suspendedDAILY MX <= 60 mg/L all year
003Solids, total suspended30DA AVG <= 3.7 lb/d all year
003Solids, total suspendedDAILY MX <= 18 lb/d all year
003Flow, in conduit or thru treatment plantMO AVG report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
003Chlorine, total residualDAILY MX <= .05 mg/L all year
A01Solids, total suspended30DA AVG <= 15 mg/L all year
A01Solids, total suspendedDAILY MX <= 30 mg/L all year
A01Oil & GreaseANNL AVG <= 15 mg/L Dec
A01Oil & GreaseANNL MAX <= 30 mg/L Dec
A01Flow, in conduit or thru treatment plantMO AVG report only all year
A01Flow, in conduit or thru treatment plantDAILY MX report only all year
B01Solids, total suspended30DA AVG <= 15 mg/L all year
B01Solids, total suspendedDAILY MX <= 30 mg/L all year
B01Oil & GreaseANNL AVG <= 15 mg/L Dec
B01Oil & GreaseANNL MAX <= 20 mg/L Dec
B01Flow, in conduit or thru treatment plantMO AVG report only all year
B01Flow, in conduit or thru treatment plantDAILY MX report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states