SEVILLE WWTP
NPDES ID: OH0027375
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: 9 effluent violations.
Violations
May 31, 2026
Nitrogen, ammonia total [as N]
4% over limit
Discharged 2.9 kg/d against a permitted limit of 2.8 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
22% over limit
Discharged 2.8 mg/L against a permitted limit of 2.3 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
39% over limit
Discharged 6.1 kg/d against a permitted limit of 4.4 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
April 30, 2026
BOD, carbonaceous [5 day, 20 C]
17% over limit
Discharged 22.22 kg/d against a permitted limit of 19 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
148% over limit
Discharged 25 kg/d against a permitted limit of 10.1 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
16% over limit
Discharged 32.52 kg/d against a permitted limit of 28 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Lead, total recoverable
47% over limit
Discharged 0.1 kg/d against a permitted limit of 0.068 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
41% over limit
Discharged 9.3 kg/d against a permitted limit of 6.6 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
6% over limit
Discharged 5.6 mg/L against a permitted limit of 5.3 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
9% over limit
Discharged 5.8 mg/L against a permitted limit of 5.3 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
39% over limit
Discharged 14 kg/d against a permitted limit of 10.1 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
20% over limit
Discharged 4.2 mg/L against a permitted limit of 3.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
77% over limit
Discharged 9.4 mg/L against a permitted limit of 5.3 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
39% over limit
Discharged 14 kg/d against a permitted limit of 10.1 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
January 31, 2025
BOD, carbonaceous [5 day, 20 C]
1% over limit
Discharged 28.32 kg/d against a permitted limit of 28 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (5 days ago)