WEST CHICAGO ENVIRONMENTAL RESPONSE TRUST

NPDES ID: IL0063495

E — SNC: Effluent violation (monthly average limit)

The facility discharged more of a pollutant than its permit allows, based on a monthly average.

This quarter: 3 effluent violations.

Violations

May 31, 2026

Nickel, total [as Ni]

118% over limit

Discharged 0.024 mg/L against a permitted limit of 0.011 mg/L (30DA AVG)

DMR, Limited - Numeric Violation

Nickel, total [as Ni]

93% over limit

Discharged 0.0069916 kg/d against a permitted limit of 0.003632 kg/d (30DA AVG)

DMR, Limited - Numeric Violation

April 30, 2026

Nickel, total [as Ni]

103% over limit

Discharged 0.0223 mg/L against a permitted limit of 0.011 mg/L (30DA AVG)

DMR, Limited - Numeric Violation

First flagged

April 14, 2026 (4 months ago)

Last confirmed

August 15, 2026 (4 hours ago)