CLARK WWTF
NPDES ID: MO0054585
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
Violations
March 31, 2026
Nitrogen, ammonia total [as N]
611% over limit
Discharged 19.2 mg/L against a permitted limit of 2.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
102% over limit
Discharged 19.2 mg/L against a permitted limit of 9.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
56% over limit
Discharged 14.8 mg/L against a permitted limit of 9.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
429% over limit
Discharged 14.8 mg/L against a permitted limit of 2.8 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
46% over limit
Discharged 4.1 mg/L against a permitted limit of 2.8 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Solids, total suspended
3% over limit
Discharged 82.5 mg/L against a permitted limit of 80 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)