MATTOON EATER TREATMENT PLANT
NPDES ID: ILG640205
X — SNC: Effluent violation (non-monthly average limit)
The facility discharged more of a pollutant than its permit allows, measured over a period other than a monthly average.
This quarter: 1 effluent violation.
Violations
June 30, 2026
Chlorine, total residual
80% over limit
Discharged 0.09 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
pH
0% over limit
Discharged 10 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Numeric Violation
Chlorine, total residual
180% over limit
Discharged 0.14 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
pH
0% over limit
Discharged 10 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Numeric Violation
January 31, 2026
Chlorine, total residual
480% over limit
Discharged 0.29 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.9 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (5 months ago)
Last confirmed
September 15, 2026 (5 days ago)