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West Chicago Environmental Response Trust

Wrecking And Demolition Work, West Chicago, Illinois. NPDES permit IL0063495, in force until Aug 31, 2030. Last 12 months: over a limit 3 times (last May 2026), 2 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form 0 monthly (22 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 3 of 12 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
April 2026Nickel, total [as Ni], 30-day average.0223 mg/L≤ .011 mg/L103%
May 2026Nickel, total [as Ni], 30-day average.0154 lb/d≤ .008 lb/d93%
May 2026Nickel, total [as Ni], 30-day average.024 mg/L≤ .011 mg/L118%

Limits in force (114)

ParameterStatisticLimitMonths
pHmonthly minimum≥ 6 SUall year
pHmonthly minimum≥ 6 SUall year
pHmonthly maximum≤ 9 SUall year
pHmonthly maximum≤ 9 SUall year
Solids, total suspended30-day average≤ 15 mg/Lall year
Solids, total suspended30-day average≤ 15 mg/Lall year
Solids, total suspendeddaily maximum≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 30 mg/Lall year
Solids, total suspended30-day average≤ 4.5 lb/dall year
Solids, total suspended30-day average≤ 4.5 lb/dall year
Solids, total suspendeddaily maximum≤ 10.75 lb/dall year
Solids, total suspendeddaily maximum≤ 10.75 lb/dall year
Nitrogen, ammonia total [as N]30-day average≤ 2.6 mg/LMar, Apr, May, Sep, Oct
Nitrogen, ammonia total [as N]30-day average≤ 2.6 mg/LMar, Apr, May, Sep, Oct
Nitrogen, ammonia total [as N]30-day average≤ 1.7 mg/LJun–Aug
Nitrogen, ammonia total [as N]30-day average≤ 1.7 mg/LJun–Aug
Nitrogen, ammonia total [as N]30-day average≤ 4 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]30-day average≤ 4 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 10.1 mg/LMar, Apr, May, Sep, Oct
Nitrogen, ammonia total [as N]daily maximum≤ 10.1 mg/LMar, Apr, May, Sep, Oct
Nitrogen, ammonia total [as N]daily maximum≤ 12.4 mg/LJun–Aug
Nitrogen, ammonia total [as N]daily maximum≤ 12.4 mg/LJun–Aug
Nitrogen, ammonia total [as N]daily maximum≤ 5 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 5 mg/LJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]30-day average≤ .78 lb/dMar, Apr, May, Sep, Oct
Nitrogen, ammonia total [as N]30-day average≤ .78 lb/dMar, Apr, May, Sep, Oct
Nitrogen, ammonia total [as N]30-day average≤ .51 lb/dJun–Aug
Nitrogen, ammonia total [as N]30-day average≤ .51 lb/dJun–Aug
Nitrogen, ammonia total [as N]30-day average≤ 1.2 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]30-day average≤ 1.2 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 3.62 lb/dMar, Apr, May, Sep, Oct
Nitrogen, ammonia total [as N]daily maximum≤ 3.62 lb/dMar, Apr, May, Sep, Oct
Nitrogen, ammonia total [as N]daily maximum≤ 4.44 lb/dJun–Aug
Nitrogen, ammonia total [as N]daily maximum≤ 4.44 lb/dJun–Aug
Nitrogen, ammonia total [as N]daily maximum≤ 1.79 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 1.79 lb/dJan, Feb, Nov, Dec
Nitrogen, ammonia total [as N]weekly average≤ 4.8 mg/LJun–Aug
Nitrogen, ammonia total [as N]weekly average≤ 4.8 mg/LJun–Aug
Nitrogen, ammonia total [as N]weekly average≤ 7 mg/LMar, Apr, May, Sep, Oct
Nitrogen, ammonia total [as N]weekly average≤ 7 mg/LMar, Apr, May, Sep, Oct
Nitrogen, ammonia total [as N]weekly average≤ 2.1 lb/dMar, Apr, May, Sep, Oct
Nitrogen, ammonia total [as N]weekly average≤ 2.1 lb/dMar, Apr, May, Sep, Oct
Nitrogen, ammonia total [as N]weekly average≤ 1.4 lb/dJun–Aug
Nitrogen, ammonia total [as N]weekly average≤ 1.4 lb/dJun–Aug
Chloride [as Cl]daily maximum≤ 500 mg/Lall year
Chloride [as Cl]daily maximum≤ 500 mg/Lall year
Chloride [as Cl]daily maximum≤ 179 lb/dall year
Chloride [as Cl]daily maximum≤ 179 lb/dall year
Sulfate, total [as SO4]30-day averagereport only (mg/L)all year
Sulfate, total [as SO4]30-day averagereport only (mg/L)all year
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year
Fluoride, total [as F]30-day averagereport only (mg/L)all year
Fluoride, total [as F]30-day averagereport only (mg/L)all year
Fluoride, total [as F]daily maximumreport only (mg/L)all year
Fluoride, total [as F]daily maximumreport only (mg/L)all year
Copper, total [as Cu]30-day average≤ .026 mg/Lall year
Copper, total [as Cu]30-day average≤ .026 mg/Lall year
Copper, total [as Cu]daily maximum≤ .041 mg/Lall year
Copper, total [as Cu]daily maximum≤ .041 mg/Lall year
Copper, total [as Cu]30-day average≤ .008 lb/dall year
Copper, total [as Cu]30-day average≤ .008 lb/dall year
Copper, total [as Cu]daily maximum≤ .015 lb/dall year
Copper, total [as Cu]daily maximum≤ .015 lb/dall year
Iron, total [as Fe]30-day average≤ 2 mg/Lall year
Iron, total [as Fe]30-day average≤ 2 mg/Lall year
Iron, total [as Fe]daily maximum≤ 4 mg/Lall year
Iron, total [as Fe]daily maximum≤ 4 mg/Lall year
Iron, total [as Fe]30-day average≤ .6 lb/dall year
Iron, total [as Fe]30-day average≤ .6 lb/dall year
Iron, total [as Fe]daily maximum≤ 1.4 lb/dall year
Iron, total [as Fe]daily maximum≤ 1.4 lb/dall year
Lead, total [as Pb]30-day average≤ .063 mg/Lall year
Lead, total [as Pb]30-day average≤ .063 mg/Lall year
Lead, total [as Pb]daily maximum≤ .301 mg/Lall year
Lead, total [as Pb]daily maximum≤ .301 mg/Lall year
Lead, total [as Pb]30-day average≤ .019 lb/dall year
Lead, total [as Pb]30-day average≤ .019 lb/dall year
Lead, total [as Pb]daily maximum≤ .108 lb/dall year
Lead, total [as Pb]daily maximum≤ .108 lb/dall year
Manganese, total [as Mn]30-day average≤ 1 mg/Lall year
Manganese, total [as Mn]30-day average≤ 1 mg/Lall year
Manganese, total [as Mn]daily maximum≤ 2 mg/Lall year
Manganese, total [as Mn]daily maximum≤ 2 mg/Lall year
Manganese, total [as Mn]30-day average≤ .3 lb/dall year
Manganese, total [as Mn]30-day average≤ .3 lb/dall year
Manganese, total [as Mn]daily maximum≤ .718 lb/dall year
Manganese, total [as Mn]daily maximum≤ .718 lb/dall year
Nickel, total [as Ni]30-day average≤ .01 mg/Lall year
Nickel, total [as Ni]30-day average≤ .01 mg/Lall year
Nickel, total [as Ni]daily maximum≤ .177 mg/Lall year
Nickel, total [as Ni]daily maximum≤ .177 mg/Lall year
Nickel, total [as Ni]30-day average≤ .003 lb/dall year
Nickel, total [as Ni]30-day average≤ .003 lb/dall year
Nickel, total [as Ni]daily maximum≤ .064 lb/dall year
Nickel, total [as Ni]daily maximum≤ .064 lb/dall year
Silver, total [as Ag]daily maximum≤ .005 mg/Lall year
Silver, total [as Ag]daily maximum≤ .005 mg/Lall year
Silver, total [as Ag]daily maximum≤ .002 lb/dall year
Silver, total [as Ag]daily maximum≤ .002 lb/dall year
Oil and grease30-day average≤ 15 mg/Lall year
Oil and grease30-day average≤ 15 mg/Lall year
Oil and greasedaily maximum≤ 30 mg/Lall year
Oil and greasedaily maximum≤ 30 mg/Lall year
Oil and grease30-day average≤ 4.5 lb/dall year
Oil and grease30-day average≤ 4.5 lb/dall year
Oil and greasedaily maximum≤ 10.75 lb/dall year
Oil and greasedaily maximum≤ 10.75 lb/dall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Mercury, total [as Hg]annual average≤ 12 ng/Lall year
Mercury, total [as Hg]annual average≤ 12 ng/Lall year

How strict are these limits?

Cited limits by parameter: Illinois's rules and the federal ones.

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