MIDWEST GENERATION LLC

NPDES permit IL0002178 · Minor NON-POTW · effective, expires 2029-03-31 · 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 13 forms filed late

Last period with anything received: 2026-07-31.

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 (44)

OutfallParameterStatisticLimitMonths
003Solids, total suspended30DA AVG report only all year
003Solids, total suspendedDAILY MX report only all year
003Oil & GreaseDAILY MX report only all year
003Oil & GreaseDAILY MX report only all year
003Cyanide, weak acid, dissociableDAILY MX report only all year
003Cyanide, weak acid, dissociableDAILY MX report only all year
003Cyanide, total [as CN]DAILY MX report only all year
003Cyanide, total [as CN]DAILY MX report only all year
003Fluoride, total [as F]DAILY MX report only all year
003Fluoride, total [as F]DAILY MX report only all year
003Arsenic, total [as As]DAILY MX report only all year
003Arsenic, total [as As]DAILY MX report only all year
003Barium, total [as Ba]DAILY MX report only all year
003Barium, total [as Ba]DAILY MX report only all year
003Cadmium, total [as Cd]DAILY MX report only all year
003Cadmium, total [as Cd]DAILY MX report only all year
003Chromium, hexavalent [as Cr]DAILY MX report only all year
003Chromium, hexavalent [as Cr]DAILY MX report only all year
003Chromium, total [as Cr]DAILY MX report only all year
003Chromium, total [as Cr]DAILY MX report only all year
003Copper, total [as Cu]DAILY MX report only all year
003Copper, total [as Cu]DAILY MX report only all year
003Iron, total [as Fe]DAILY MX report only all year
003Iron, total [as Fe]DAILY MX report only all year
003Iron, dissolved [as Fe]DAILY MX report only all year
003Iron, dissolved [as Fe]DAILY MX report only all year
003Lead, total [as Pb]DAILY MX report only all year
003Lead, total [as Pb]DAILY MX report only all year
003Manganese, total [as Mn]DAILY MX report only all year
003Manganese, total [as Mn]DAILY MX report only all year
003Nickel, total [as Ni]DAILY MX report only all year
003Nickel, total [as Ni]DAILY MX report only all year
003Silver, total [as Ag]DAILY MX report only all year
003Silver, total [as Ag]DAILY MX report only all year
003Zinc, total [as Zn]DAILY MX report only all year
003Zinc, total [as Zn]DAILY MX report only all year
003Selenium, total [as Se]DAILY MX report only all year
003Selenium, total [as Se]DAILY MX report only all year
003Phenolics, total recoverableDAILY MX report only all year
003Phenolics, total recoverableDAILY MX report only 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
003Mercury, total [as Hg]DAILY MX report only all year
003Mercury, total [as Hg]DAILY 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