MIDWEST GENERATION, LLC — NPDES permit IL0002216: limits, due date and EPA's record

NPDES permit IL0002216 · Major NON-POTW · effective, expires 2028-09-30 · EPA's file as of 2026-09-19

EPA's record, 2025-09-01 to 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 (201)

Outfall	Parameter	Statistic	Limit	Months
001	Temperature, water deg. fahrenheit	MO MAX	<= 68 deg F	Jan, Feb
001	Temperature, water deg. fahrenheit	MO MAX	<= 73 deg F	Mar, Dec
001	Temperature, water deg. fahrenheit	MO MAX	<= 83 deg F	Apr
001	Temperature, water deg. fahrenheit	MO MAX	<= 88 deg F	May, Nov
001	Temperature, water deg. fahrenheit	MO MAX	<= 96 deg F	Jun, Jul, Aug, Sep
001	Temperature, water deg. fahrenheit	MO MAX	<= 93 deg F	Oct
001	pH	MO MIN	>= 6 SU	all year
001	pH	MO MAX	<= 9 SU	all year
001	Oil & Grease	DAILY MX	report only	all year
001	Oil & Grease	DAILY MX	report only	all year
001	Cyanide, weak acid, dissociable	DAILY MX	report only	all year
001	Cyanide, weak acid, dissociable	DAILY MX	report only	all year
001	Cyanide, total [as CN]	DAILY MX	report only	all year
001	Cyanide, total [as CN]	DAILY MX	report only	all year
001	Fluoride, total [as F]	DAILY MX	report only	all year
001	Fluoride, total [as F]	DAILY MX	report only	all year
001	Arsenic, total [as As]	DAILY MX	report only	all year
001	Arsenic, total [as As]	DAILY MX	report only	all year
001	Barium, total [as Ba]	DAILY MX	report only	all year
001	Barium, total [as Ba]	DAILY MX	report only	all year
001	Cadmium, total [as Cd]	DAILY MX	report only	all year
001	Cadmium, total [as Cd]	DAILY MX	report only	all year
001	Chromium, hexavalent [as Cr]	DAILY MX	report only	all year
001	Chromium, hexavalent [as Cr]	DAILY MX	report only	all year
001	Chromium, total [as Cr]	DAILY MX	report only	all year
001	Chromium, total [as Cr]	DAILY MX	report only	all year
001	Copper, total [as Cu]	DAILY MX	report only	all year
001	Copper, total [as Cu]	DAILY MX	report only	all year
001	Iron, total [as Fe]	DAILY MX	report only	all year
001	Iron, total [as Fe]	DAILY MX	report only	all year
001	Iron, dissolved [as Fe]	DAILY MX	report only	all year
001	Iron, dissolved [as Fe]	DAILY MX	report only	all year
001	Lead, total [as Pb]	DAILY MX	report only	all year
001	Lead, total [as Pb]	DAILY MX	report only	all year
001	Manganese, total [as Mn]	DAILY MX	report only	all year
001	Manganese, total [as Mn]	DAILY MX	report only	all year
001	Nickel, total [as Ni]	DAILY MX	report only	all year
001	Nickel, total [as Ni]	DAILY MX	report only	all year
001	Silver, total [as Ag]	DAILY MX	report only	all year
001	Silver, total [as Ag]	DAILY MX	report only	all year
001	Zinc, total [as Zn]	DAILY MX	report only	all year
001	Zinc, total [as Zn]	DAILY MX	report only	all year
001	Selenium, total [as Se]	DAILY MX	report only	all year
001	Selenium, total [as Se]	DAILY MX	report only	all year
001	Phenolics, total recoverable	DAILY MX	report only	all year
001	Phenolics, total recoverable	DAILY MX	report only	all year
001	Temperature, length of excursion	ANNL TOT	<= 438 hr/12mo	all year
001	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
001	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
001	Chlorine, total residual	DAILY MX	<= .05 mg/L	all year
001	Mercury, total [as Hg]	DAILY MX	report only	Mar, Jun, Sep, Dec
001	Mercury, total [as Hg]	DAILY MX	report only	all year
001	Mercury, total [as Hg]	DAILY MX	report only	all year
003	pH	MO MIN	>= 6 SU	all year
003	pH	MO MAX	<= 9 SU	all year
003	Solids, total suspended	30DA AVG	<= 15 mg/L	all year
003	Solids, total suspended	DAILY MX	<= 30 mg/L	all year
003	Oil & Grease	30DA AVG	<= 15 mg/L	all year
003	Oil & Grease	DAILY MX	<= 20 mg/L	all year
003	Oil & Grease	DAILY MX	report only	all year
003	Oil & Grease	DAILY MX	report only	all year
003	Cyanide, weak acid, dissociable	DAILY MX	report only	all year
003	Cyanide, weak acid, dissociable	DAILY MX	report only	all year
003	Cyanide, total [as CN]	DAILY MX	report only	all year
003	Cyanide, total [as CN]	DAILY MX	report only	all year
003	Fluoride, total [as F]	DAILY MX	report only	all year
003	Fluoride, total [as F]	DAILY MX	report only	all year
003	Arsenic, total [as As]	DAILY MX	report only	all year
003	Arsenic, total [as As]	DAILY MX	report only	all year
003	Barium, total [as Ba]	DAILY MX	report only	all year
003	Barium, total [as Ba]	DAILY MX	report only	all year
003	Cadmium, total [as Cd]	DAILY MX	report only	all year
003	Cadmium, total [as Cd]	DAILY MX	report only	all year
003	Chromium, hexavalent [as Cr]	DAILY MX	report only	all year
003	Chromium, hexavalent [as Cr]	DAILY MX	report only	all year
003	Chromium, total [as Cr]	DAILY MX	report only	all year
003	Chromium, total [as Cr]	DAILY MX	report only	all year
003	Copper, total [as Cu]	DAILY MX	report only	all year
003	Copper, total [as Cu]	DAILY MX	report only	all year
003	Iron, total [as Fe]	DAILY MX	report only	all year
003	Iron, total [as Fe]	DAILY MX	report only	all year
003	Iron, dissolved [as Fe]	DAILY MX	report only	all year
003	Iron, dissolved [as Fe]	DAILY MX	report only	all year
003	Lead, total [as Pb]	DAILY MX	report only	all year
003	Lead, total [as Pb]	DAILY MX	report only	all year
003	Manganese, total [as Mn]	DAILY MX	report only	all year
003	Manganese, total [as Mn]	DAILY MX	report only	all year
003	Nickel, total [as Ni]	DAILY MX	report only	all year
003	Nickel, total [as Ni]	DAILY MX	report only	all year
003	Silver, total [as Ag]	DAILY MX	report only	all year
003	Silver, total [as Ag]	DAILY MX	report only	all year
003	Zinc, total [as Zn]	DAILY MX	report only	all year
003	Zinc, total [as Zn]	DAILY MX	report only	all year
003	Selenium, total [as Se]	DAILY MX	report only	all year
003	Selenium, total [as Se]	DAILY MX	report only	all year
003	Phenolics, total recoverable	DAILY MX	report only	all year
003	Phenolics, total recoverable	DAILY MX	report only	all year
003	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
003	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
003	Mercury, total [as Hg]	DAILY MX	report only	all year
003	Mercury, total [as Hg]	DAILY MX	report only	all year
004	pH	MO MIN	>= 6 SU	all year
004	pH	MO MAX	<= 9 SU	all year
004	Solids, total suspended	30DA AVG	<= 15 mg/L	all year
004	Solids, total suspended	DAILY MX	<= 30 mg/L	all year
004	Oil & Grease	DAILY MX	report only	all year
004	Oil & Grease	DAILY MX	report only	all year
004	Cyanide, weak acid, dissociable	DAILY MX	report only	all year
004	Cyanide, weak acid, dissociable	DAILY MX	report only	all year
004	Cyanide, total [as CN]	DAILY MX	report only	all year
004	Cyanide, total [as CN]	DAILY MX	report only	all year
004	Fluoride, total [as F]	DAILY MX	report only	all year
004	Fluoride, total [as F]	DAILY MX	report only	all year
004	Arsenic, total [as As]	DAILY MX	report only	all year
004	Arsenic, total [as As]	DAILY MX	report only	all year
004	Barium, total [as Ba]	DAILY MX	report only	all year
004	Barium, total [as Ba]	DAILY MX	report only	all year
004	Cadmium, total [as Cd]	DAILY MX	report only	all year
004	Cadmium, total [as Cd]	DAILY MX	report only	all year
004	Chromium, hexavalent [as Cr]	DAILY MX	report only	all year
004	Chromium, hexavalent [as Cr]	DAILY MX	report only	all year
004	Chromium, total [as Cr]	DAILY MX	report only	all year
004	Chromium, total [as Cr]	DAILY MX	report only	all year
004	Copper, total [as Cu]	DAILY MX	report only	all year
004	Copper, total [as Cu]	DAILY MX	report only	all year
004	Iron, total [as Fe]	DAILY MX	report only	all year
004	Iron, total [as Fe]	DAILY MX	report only	all year
004	Iron, dissolved [as Fe]	DAILY MX	report only	all year
004	Iron, dissolved [as Fe]	DAILY MX	report only	all year
004	Lead, total [as Pb]	DAILY MX	report only	all year
004	Lead, total [as Pb]	DAILY MX	report only	all year
004	Manganese, total [as Mn]	DAILY MX	report only	all year
004	Manganese, total [as Mn]	DAILY MX	report only	all year
004	Nickel, total [as Ni]	DAILY MX	report only	all year
004	Nickel, total [as Ni]	DAILY MX	report only	all year
004	Silver, total [as Ag]	DAILY MX	report only	all year
004	Silver, total [as Ag]	DAILY MX	report only	all year
004	Zinc, total [as Zn]	DAILY MX	report only	all year
004	Zinc, total [as Zn]	DAILY MX	report only	all year
004	Selenium, total [as Se]	DAILY MX	report only	all year
004	Selenium, total [as Se]	DAILY MX	report only	all year
004	Phenolics, total recoverable	DAILY MX	report only	all year
004	Phenolics, total recoverable	DAILY MX	report only	all year
004	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
004	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
004	Mercury, total [as Hg]	DAILY MX	report only	all year
004	Mercury, total [as Hg]	DAILY MX	report only	all year
005	pH	MO MIN	>= 6 SU	all year
005	pH	MO MAX	<= 9 SU	all year
005	Solids, total suspended	30DA AVG	<= 15 mg/L	all year
005	Solids, total suspended	DAILY MX	<= 30 mg/L	all year
005	Oil & Grease	30DA AVG	<= 15 mg/L	all year
005	Oil & Grease	DAILY MX	<= 20 mg/L	all year
005	Oil & Grease	DAILY MX	report only	all year
005	Oil & Grease	DAILY MX	report only	all year
005	Cyanide, weak acid, dissociable	DAILY MX	report only	all year
005	Cyanide, weak acid, dissociable	DAILY MX	report only	all year
005	Cyanide, total [as CN]	DAILY MX	report only	all year
005	Cyanide, total [as CN]	DAILY MX	report only	all year
005	Fluoride, total [as F]	DAILY MX	report only	all year
005	Fluoride, total [as F]	DAILY MX	report only	all year
005	Arsenic, total [as As]	DAILY MX	report only	all year
005	Arsenic, total [as As]	DAILY MX	report only	all year
005	Barium, total [as Ba]	DAILY MX	report only	all year
005	Barium, total [as Ba]	DAILY MX	report only	all year
005	Cadmium, total [as Cd]	DAILY MX	report only	all year
005	Cadmium, total [as Cd]	DAILY MX	report only	all year
005	Chromium, hexavalent [as Cr]	DAILY MX	report only	all year
005	Chromium, hexavalent [as Cr]	DAILY MX	report only	all year
005	Chromium, total [as Cr]	DAILY MX	report only	all year
005	Chromium, total [as Cr]	DAILY MX	report only	all year
005	Copper, total [as Cu]	DAILY MX	report only	all year
005	Copper, total [as Cu]	DAILY MX	report only	all year
005	Iron, total [as Fe]	DAILY MX	report only	all year
005	Iron, total [as Fe]	DAILY MX	report only	all year
005	Iron, dissolved [as Fe]	DAILY MX	report only	all year
005	Iron, dissolved [as Fe]	DAILY MX	report only	all year
005	Lead, total [as Pb]	DAILY MX	report only	all year
005	Lead, total [as Pb]	DAILY MX	report only	all year
005	Manganese, total [as Mn]	DAILY MX	report only	all year
005	Manganese, total [as Mn]	DAILY MX	report only	all year
005	Nickel, total [as Ni]	DAILY MX	report only	all year
005	Nickel, total [as Ni]	DAILY MX	report only	all year
005	Silver, total [as Ag]	DAILY MX	report only	all year
005	Silver, total [as Ag]	DAILY MX	report only	all year
005	Zinc, total [as Zn]	DAILY MX	report only	all year
005	Zinc, total [as Zn]	DAILY MX	report only	all year
005	Selenium, total [as Se]	DAILY MX	report only	all year
005	Selenium, total [as Se]	DAILY MX	report only	all year
005	Phenolics, total recoverable	DAILY MX	report only	all year
005	Phenolics, total recoverable	DAILY MX	report only	all year
005	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
005	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
005	Mercury, total [as Hg]	DAILY MX	report only	all year
005	Mercury, total [as Hg]	DAILY MX	report only	all year
B01	BOD, 5-day, 20 deg. C	30DA AVG	<= 30 mg/L	all year
B01	BOD, 5-day, 20 deg. C	DAILY MX	<= 60 mg/L	all year
B01	Solids, total suspended	30DA AVG	<= 30 mg/L	all year
B01	Solids, total suspended	DAILY MX	<= 60 mg/L	all year
B01	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
B01	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year