WEST CHICAGO ENVIRONMENTAL RESPONSE TRUST — NPDES permit IL0063495: limits, due date and EPA's record

NPDES permit IL0063495 · Minor NON-POTW · effective, expires 2030-08-31 · EPA's file as of 2026-09-19

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

Last period with anything received: 2026-07-31. Most often over: Nickel, total [as Ni] (3).

Reporting

Reports are due about 25 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (214)

Outfall	Parameter	Statistic	Limit	Months
001	pH	MO MIN	>= 6 SU	all year
001	pH	MO MIN	>= 6 SU	all year
001	pH	MO MAX	<= 9 SU	all year
001	pH	MO MAX	<= 9 SU	all year
001	Solids, total suspended	30DA AVG	<= 15 mg/L	all year
001	Solids, total suspended	30DA AVG	<= 15 mg/L	all year
001	Solids, total suspended	30DA AVG	<= 15 mg/L	all year
001	Solids, total suspended	30DA AVG	<= 15 mg/L	all year
001	Solids, total suspended	DAILY MX	<= 30 mg/L	all year
001	Solids, total suspended	DAILY MX	<= 30 mg/L	all year
001	Solids, total suspended	DAILY MX	<= 30 mg/L	all year
001	Solids, total suspended	DAILY MX	<= 30 mg/L	all year
001	Solids, total suspended	30DA AVG	<= 4.5 lb/d	all year
001	Solids, total suspended	30DA AVG	<= 4.5 lb/d	all year
001	Solids, total suspended	30DA AVG	<= 10.8 lb/d	all year
001	Solids, total suspended	30DA AVG	<= 10.8 lb/d	all year
001	Solids, total suspended	DAILY MX	<= 10.75 lb/d	all year
001	Solids, total suspended	DAILY MX	<= 10.75 lb/d	all year
001	Solids, total suspended	DAILY MX	<= 25.8 lb/d	all year
001	Solids, total suspended	DAILY MX	<= 25.8 lb/d	all year
001	Nitrogen, ammonia total [as N]	30DA AVG	<= 2.6 mg/L	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	30DA AVG	<= 2.6 mg/L	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	30DA AVG	<= 1.7 mg/L	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	30DA AVG	<= 1.7 mg/L	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	30DA AVG	<= 4 mg/L	Jan, Feb, Nov, Dec
001	Nitrogen, ammonia total [as N]	30DA AVG	<= 4 mg/L	Jan, Feb, Nov, Dec
001	Nitrogen, ammonia total [as N]	30DA AVG	<= 2.6 mg/L	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	30DA AVG	<= 2.6 mg/L	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	30DA AVG	<= 1.9 mg/L	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	30DA AVG	<= 1.9 mg/L	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	30DA AVG	<= 4 mg/L	Jan, Feb, Nov, Dec
001	Nitrogen, ammonia total [as N]	30DA AVG	<= 4 mg/L	Jan, Feb, Nov, Dec
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 10.1 mg/L	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 10.1 mg/L	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 12.4 mg/L	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 12.4 mg/L	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 5 mg/L	Jan, Feb, Nov, Dec
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 5 mg/L	Jan, Feb, Nov, Dec
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 10.1 mg/L	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 10.1 mg/L	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 12.4 mg/L	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 12.4 mg/L	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 5 mg/L	Jan, Feb, Nov, Dec
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 5 mg/L	Jan, Feb, Nov, Dec
001	Nitrogen, ammonia total [as N]	30DA AVG	<= .78 lb/d	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	30DA AVG	<= .78 lb/d	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	30DA AVG	<= .51 lb/d	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	30DA AVG	<= .51 lb/d	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	30DA AVG	<= 1.2 lb/d	Jan, Feb, Nov, Dec
001	Nitrogen, ammonia total [as N]	30DA AVG	<= 1.2 lb/d	Jan, Feb, Nov, Dec
001	Nitrogen, ammonia total [as N]	30DA AVG	<= 1.8 lb/d	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	30DA AVG	<= 1.8 lb/d	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	30DA AVG	<= 1.2 lb/d	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	30DA AVG	<= 1.2 lb/d	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	30DA AVG	<= 2.8 lb/d	Jan, Feb, Nov, Dec
001	Nitrogen, ammonia total [as N]	30DA AVG	<= 2.8 lb/d	Jan, Feb, Nov, Dec
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 3.62 lb/d	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 3.62 lb/d	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 4.44 lb/d	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 4.44 lb/d	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 1.79 lb/d	Jan, Feb, Nov, Dec
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 1.79 lb/d	Jan, Feb, Nov, Dec
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 8.6 lb/d	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 8.6 lb/d	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 10.6 lb/d	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 10.6 lb/d	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 4.3 lb/d	Jan, Feb, Nov, Dec
001	Nitrogen, ammonia total [as N]	DAILY MX	<= 4.3 lb/d	Jan, Feb, Nov, Dec
001	Nitrogen, ammonia total [as N]	WKLY AVG	<= 4.8 mg/L	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	WKLY AVG	<= 4.8 mg/L	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	WKLY AVG	<= 7 mg/L	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	WKLY AVG	<= 7 mg/L	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	WKLY AVG	<= 7 mg/L	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	WKLY AVG	<= 7 mg/L	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	WKLY AVG	<= 4.2 mg/L	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	WKLY AVG	<= 4.2 mg/L	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	WKLY AVG	<= 2.1 lb/d	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	WKLY AVG	<= 2.1 lb/d	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	WKLY AVG	<= 1.4 lb/d	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	WKLY AVG	<= 1.4 lb/d	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	WKLY AVG	<= 5.04 lb/d	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	WKLY AVG	<= 5.04 lb/d	Mar, Apr, May, Sep, Oct
001	Nitrogen, ammonia total [as N]	WKLY AVG	<= 2.8 lb/d	Jun, Jul, Aug
001	Nitrogen, ammonia total [as N]	WKLY AVG	<= 2.8 lb/d	Jun, Jul, Aug
001	Chloride [as Cl]	DAILY MX	<= 500 mg/L	all year
001	Chloride [as Cl]	DAILY MX	<= 500 mg/L	all year
001	Chloride [as Cl]	DAILY MX	<= 500 mg/L	all year
001	Chloride [as Cl]	DAILY MX	<= 500 mg/L	all year
001	Chloride [as Cl]	DAILY MX	<= 179 lb/d	all year
001	Chloride [as Cl]	DAILY MX	<= 179 lb/d	all year
001	Chloride [as Cl]	DAILY MX	<= 430 lb/d	all year
001	Chloride [as Cl]	DAILY MX	<= 430 lb/d	all year
001	Sulfate, total [as SO4]	30DA AVG	report only	all year
001	Sulfate, total [as SO4]	30DA AVG	report only	all year
001	Sulfate, total [as SO4]	DAILY MX	report only	all year
001	Sulfate, total [as SO4]	DAILY MX	report only	all year
001	Sulfate, total [as SO4]	DAILY MX	report only	all year
001	Sulfate, total [as SO4]	DAILY MX	report only	all year
001	Fluoride, total [as F]	30DA AVG	report only	all year
001	Fluoride, total [as F]	30DA AVG	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	Fluoride, total [as F]	DAILY MX	report only	all year
001	Fluoride, total [as F]	DAILY MX	report only	all year
001	Copper, total [as Cu]	30DA AVG	<= .026 mg/L	all year
001	Copper, total [as Cu]	30DA AVG	<= .026 mg/L	all year
001	Copper, total [as Cu]	30DA AVG	<= .0262 mg/L	all year
001	Copper, total [as Cu]	30DA AVG	<= .0262 mg/L	all year
001	Copper, total [as Cu]	DAILY MX	<= .041 mg/L	all year
001	Copper, total [as Cu]	DAILY MX	<= .041 mg/L	all year
001	Copper, total [as Cu]	DAILY MX	<= .041 mg/L	all year
001	Copper, total [as Cu]	DAILY MX	<= .041 mg/L	all year
001	Copper, total [as Cu]	30DA AVG	<= .008 lb/d	all year
001	Copper, total [as Cu]	30DA AVG	<= .008 lb/d	all year
001	Copper, total [as Cu]	30DA AVG	<= .019 lb/d	all year
001	Copper, total [as Cu]	30DA AVG	<= .019 lb/d	all year
001	Copper, total [as Cu]	DAILY MX	<= .015 lb/d	all year
001	Copper, total [as Cu]	DAILY MX	<= .015 lb/d	all year
001	Copper, total [as Cu]	DAILY MX	<= .036 lb/d	all year
001	Copper, total [as Cu]	DAILY MX	<= .036 lb/d	all year
001	Iron, total [as Fe]	30DA AVG	<= 2 mg/L	all year
001	Iron, total [as Fe]	30DA AVG	<= 2 mg/L	all year
001	Iron, total [as Fe]	30DA AVG	<= 2 mg/L	all year
001	Iron, total [as Fe]	30DA AVG	<= 2 mg/L	all year
001	Iron, total [as Fe]	DAILY MX	<= 4 mg/L	all year
001	Iron, total [as Fe]	DAILY MX	<= 4 mg/L	all year
001	Iron, total [as Fe]	DAILY MX	<= 4 mg/L	all year
001	Iron, total [as Fe]	DAILY MX	<= 4 mg/L	all year
001	Iron, total [as Fe]	30DA AVG	<= .6 lb/d	all year
001	Iron, total [as Fe]	30DA AVG	<= .6 lb/d	all year
001	Iron, total [as Fe]	30DA AVG	<= 1.4 lb/d	all year
001	Iron, total [as Fe]	30DA AVG	<= 1.4 lb/d	all year
001	Iron, total [as Fe]	DAILY MX	<= 1.4 lb/d	all year
001	Iron, total [as Fe]	DAILY MX	<= 1.4 lb/d	all year
001	Iron, total [as Fe]	DAILY MX	<= 3.3 lb/d	all year
001	Iron, total [as Fe]	DAILY MX	<= 3.3 lb/d	all year
001	Lead, total [as Pb]	30DA AVG	<= .063 mg/L	all year
001	Lead, total [as Pb]	30DA AVG	<= .063 mg/L	all year
001	Lead, total [as Pb]	30DA AVG	<= .063 mg/L	all year
001	Lead, total [as Pb]	30DA AVG	<= .063 mg/L	all year
001	Lead, total [as Pb]	DAILY MX	<= .301 mg/L	all year
001	Lead, total [as Pb]	DAILY MX	<= .301 mg/L	all year
001	Lead, total [as Pb]	DAILY MX	<= .301 mg/L	all year
001	Lead, total [as Pb]	DAILY MX	<= .301 mg/L	all year
001	Lead, total [as Pb]	30DA AVG	<= .019 lb/d	all year
001	Lead, total [as Pb]	30DA AVG	<= .019 lb/d	all year
001	Lead, total [as Pb]	30DA AVG	<= .045 lb/d	all year
001	Lead, total [as Pb]	30DA AVG	<= .045 lb/d	all year
001	Lead, total [as Pb]	DAILY MX	<= .108 lb/d	all year
001	Lead, total [as Pb]	DAILY MX	<= .108 lb/d	all year
001	Lead, total [as Pb]	DAILY MX	<= .25 lb/d	all year
001	Lead, total [as Pb]	DAILY MX	<= .25 lb/d	all year
001	Manganese, total [as Mn]	30DA AVG	<= 1 mg/L	all year
001	Manganese, total [as Mn]	30DA AVG	<= 1 mg/L	all year
001	Manganese, total [as Mn]	30DA AVG	<= 1 mg/L	all year
001	Manganese, total [as Mn]	30DA AVG	<= 1 mg/L	all year
001	Manganese, total [as Mn]	DAILY MX	<= 2 mg/L	all year
001	Manganese, total [as Mn]	DAILY MX	<= 2 mg/L	all year
001	Manganese, total [as Mn]	DAILY MX	<= 2 mg/L	all year
001	Manganese, total [as Mn]	DAILY MX	<= 2 mg/L	all year
001	Manganese, total [as Mn]	30DA AVG	<= .3 lb/d	all year
001	Manganese, total [as Mn]	30DA AVG	<= .3 lb/d	all year
001	Manganese, total [as Mn]	30DA AVG	<= .72 lb/d	all year
001	Manganese, total [as Mn]	30DA AVG	<= .72 lb/d	all year
001	Manganese, total [as Mn]	DAILY MX	<= .718 lb/d	all year
001	Manganese, total [as Mn]	DAILY MX	<= .718 lb/d	all year
001	Manganese, total [as Mn]	DAILY MX	<= 1.72 lb/d	all year
001	Manganese, total [as Mn]	DAILY MX	<= 1.72 lb/d	all year
001	Nickel, total [as Ni]	30DA AVG	<= .01 mg/L	all year
001	Nickel, total [as Ni]	30DA AVG	<= .01 mg/L	all year
001	Nickel, total [as Ni]	30DA AVG	<= .011 mg/L	all year
001	Nickel, total [as Ni]	30DA AVG	<= .011 mg/L	all year
001	Nickel, total [as Ni]	DAILY MX	<= .177 mg/L	all year
001	Nickel, total [as Ni]	DAILY MX	<= .177 mg/L	all year
001	Nickel, total [as Ni]	DAILY MX	<= .177 mg/L	all year
001	Nickel, total [as Ni]	DAILY MX	<= .177 mg/L	all year
001	Nickel, total [as Ni]	30DA AVG	<= .003 lb/d	all year
001	Nickel, total [as Ni]	30DA AVG	<= .003 lb/d	all year
001	Nickel, total [as Ni]	30DA AVG	<= .008 lb/d	all year
001	Nickel, total [as Ni]	30DA AVG	<= .008 lb/d	all year
001	Nickel, total [as Ni]	DAILY MX	<= .064 lb/d	all year
001	Nickel, total [as Ni]	DAILY MX	<= .064 lb/d	all year
001	Nickel, total [as Ni]	DAILY MX	<= .15 lb/d	all year
001	Nickel, total [as Ni]	DAILY MX	<= .15 lb/d	all year
001	Silver, total [as Ag]	DAILY MX	<= .005 mg/L	all year
001	Silver, total [as Ag]	DAILY MX	<= .005 mg/L	all year
001	Silver, total [as Ag]	DAILY MX	<= .005 mg/L	all year
001	Silver, total [as Ag]	DAILY MX	<= .005 mg/L	all year
001	Silver, total [as Ag]	DAILY MX	<= .002 lb/d	all year
001	Silver, total [as Ag]	DAILY MX	<= .002 lb/d	all year
001	Silver, total [as Ag]	DAILY MX	<= .048 lb/d	all year
001	Silver, total [as Ag]	DAILY MX	<= .048 lb/d	all year
001	Oil and grease	30DA AVG	<= 15 mg/L	all year
001	Oil and grease	30DA AVG	<= 15 mg/L	all year
001	Oil and grease	30DA AVG	<= 15 mg/L	all year
001	Oil and grease	30DA AVG	<= 15 mg/L	all year
001	Oil and grease	DAILY MX	<= 30 mg/L	all year
001	Oil and grease	DAILY MX	<= 30 mg/L	all year
001	Oil and grease	DAILY MX	<= 30 mg/L	all year
001	Oil and grease	DAILY MX	<= 30 mg/L	all year
001	Oil and grease	30DA AVG	<= 4.5 lb/d	all year
001	Oil and grease	30DA AVG	<= 4.5 lb/d	all year
001	Oil and grease	30DA AVG	<= 10.8 lb/d	all year
001	Oil and grease	30DA AVG	<= 10.8 lb/d	all year
001	Oil and grease	DAILY MX	<= 10.75 lb/d	all year
001	Oil and grease	DAILY MX	<= 10.75 lb/d	all year
001	Oil and grease	DAILY MX	<= 25.8 lb/d	all year
001	Oil and grease	DAILY MX	<= 25.8 lb/d	all year
001	Flow, in conduit or thru treatment plant	MO AVG	report only	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	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
001	Mercury, total [as Hg]	ANNL AVG	<= 12 ng/L	all year
001	Mercury, total [as Hg]	ANNL AVG	<= 12 ng/L	all year