MIDWEST GENERATION, LLC

NPDES permit IL0064254 · Major NON-POTW · effective, expires 2031-03-31 · 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 68 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 (93)

OutfallParameterStatisticLimitMonths
B01Solids, total suspended30DA AVG <= 15 mg/L all year
B01Solids, total suspendedDAILY MX <= 30 mg/L all year
B01Oil & Grease30DA AVG <= 15 mg/L all year
B01Oil & GreaseDAILY MX <= 20 mg/L all year
B01Oil & GreaseDAILY MX report only all year
B01Oil & GreaseDAILY MX report only all year
B01Cyanide, total [as CN]DAILY MX report only all year
B01Cyanide, total [as CN]DAILY MX report only all year
B01Cyanide, free [amenable to chlorination]DAILY MX report only all year
B01Cyanide, free [amenable to chlorination]DAILY MX report only all year
B01Fluoride, total [as F]DAILY MX report only all year
B01Fluoride, total [as F]DAILY MX report only all year
B01Arsenic, total [as As]DAILY MX report only all year
B01Arsenic, total [as As]DAILY MX report only all year
B01Barium, total [as Ba]DAILY MX report only all year
B01Barium, total [as Ba]DAILY MX report only all year
B01Cadmium, total [as Cd]DAILY MX report only all year
B01Cadmium, total [as Cd]DAILY MX report only all year
B01Chromium, hexavalent [as Cr]DAILY MX report only all year
B01Chromium, hexavalent [as Cr]DAILY MX report only all year
B01Chromium, total [as Cr]DAILY MX report only all year
B01Chromium, total [as Cr]DAILY MX report only all year
B01Copper, total [as Cu]DAILY MX report only all year
B01Copper, total [as Cu]DAILY MX report only all year
B01Iron, total [as Fe]DAILY MX report only all year
B01Iron, total [as Fe]DAILY MX report only all year
B01Iron, dissolved [as Fe]DAILY MX report only all year
B01Iron, dissolved [as Fe]DAILY MX report only all year
B01Lead, total [as Pb]DAILY MX report only all year
B01Lead, total [as Pb]DAILY MX report only all year
B01Manganese, total [as Mn]DAILY MX report only all year
B01Manganese, total [as Mn]DAILY MX report only all year
B01Nickel, total [as Ni]DAILY MX report only all year
B01Nickel, total [as Ni]DAILY MX report only all year
B01Silver, total [as Ag]DAILY MX report only all year
B01Silver, total [as Ag]DAILY MX report only all year
B01Zinc, total [as Zn]DAILY MX report only all year
B01Zinc, total [as Zn]DAILY MX report only all year
B01Selenium, total [as Se]DAILY MX report only all year
B01Selenium, total [as Se]DAILY MX report only all year
B01Phenolics, total recoverableDAILY MX report only all year
B01Phenolics, total recoverableDAILY MX report only all year
B01Flow, in conduit or thru treatment plantMO AVG report only all year
B01Flow, in conduit or thru treatment plantDAILY MX report only all year
B01Mercury, total [as Hg]DAILY MX report only all year
B01Mercury, total [as Hg]DAILY MX report only all year
G01Solids, total suspended30DA AVG <= 15 mg/L all year
G01Solids, total suspendedDAILY MX <= 30 mg/L all year
G01Oil & Grease30DA AVG <= 15 mg/L all year
G01Oil & GreaseDAILY MX <= 20 mg/L all year
G01Oil & GreaseDAILY MX report only all year
G01Oil & GreaseDAILY MX report only all year
G01Cyanide, total [as CN]DAILY MX report only all year
G01Cyanide, total [as CN]DAILY MX report only all year
G01Cyanide, free [amenable to chlorination]DAILY MX report only all year
G01Cyanide, free [amenable to chlorination]DAILY MX report only all year
G01Fluoride, total [as F]DAILY MX report only all year
G01Fluoride, total [as F]DAILY MX report only all year
G01Arsenic, total [as As]DAILY MX report only all year
G01Arsenic, total [as As]DAILY MX report only all year
G01Barium, total [as Ba]DAILY MX report only all year
G01Barium, total [as Ba]DAILY MX report only all year
G01Cadmium, total [as Cd]DAILY MX report only all year
G01Cadmium, total [as Cd]DAILY MX report only all year
G01Chromium, hexavalent [as Cr]DAILY MX report only all year
G01Chromium, hexavalent [as Cr]DAILY MX report only all year
G01Chromium, total [as Cr]DAILY MX report only all year
G01Chromium, total [as Cr]DAILY MX report only all year
G01Copper, total [as Cu]DAILY MX report only all year
G01Copper, total [as Cu]DAILY MX report only all year
G01Iron, total [as Fe]DAILY MX report only all year
G01Iron, total [as Fe]DAILY MX report only all year
G01Iron, dissolved [as Fe]DAILY MX report only all year
G01Iron, dissolved [as Fe]DAILY MX report only all year
G01Lead, total [as Pb]DAILY MX report only all year
G01Lead, total [as Pb]DAILY MX report only all year
G01Manganese, total [as Mn]DAILY MX report only all year
G01Manganese, total [as Mn]DAILY MX report only all year
G01Nickel, total [as Ni]DAILY MX report only all year
G01Nickel, total [as Ni]DAILY MX report only all year
G01Silver, total [as Ag]DAILY MX report only all year
G01Silver, total [as Ag]DAILY MX report only all year
G01Zinc, total [as Zn]DAILY MX report only all year
G01Zinc, total [as Zn]DAILY MX report only all year
G01Selenium, total [as Se]DAILY MX report only all year
G01Selenium, total [as Se]DAILY MX report only all year
G01Phenolics, total recoverableDAILY MX report only all year
G01Phenolics, total recoverableDAILY MX report only all year
G01Flow, in conduit or thru treatment plantMO AVG report only all year
G01Flow, in conduit or thru treatment plantDAILY MX report only all year
G01Mercury, total [as Hg]SX report only Jan, Jul
G01Mercury, total [as Hg]DAILY MX report only all year
G01Mercury, 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