ONARGA STP, VILLAGE OF
NPDES ID: IL0076813
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
Violations
June 30, 2025
Coliform, fecal general
500% over limit
Discharged 2400 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
Coliform, fecal general
925% over limit
Discharged 4100 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2024
Coliform, fecal general
250% over limit
Discharged 1400 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2024
Coliform, fecal general
700% over limit
Discharged 3200 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2024
Coliform, fecal general
200% over limit
Discharged 1200 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (5 days ago)