ASSUMPTION STP, CITY OF
NPDES ID: IL0020907
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
This quarter: 3 effluent violations, 3 permit schedule violations.
Violations
May 31, 2026
Solids, total suspended
8% over limit
Discharged 40 mg/L against a permitted limit of 37 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Solids, total suspended
27% over limit
Discharged 47 mg/L against a permitted limit of 37 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
4% over limit
Discharged 47 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Solids, total suspended
11% over limit
Discharged 41 mg/L against a permitted limit of 37 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Solids, total suspended
0% over limit
Discharged 32.41559973 kg/d against a permitted limit of 167.072 kg/d (WKLY AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 14.85487988 kg/d against a permitted limit of 137.108 kg/d (MO AVG)
DMR, Limited - Overdue
First flagged
April 14, 2026 (5 months ago)
Last confirmed
September 15, 2026 (5 days ago)