LONDON WWTP
NPDES ID: OH0023779
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.
Violations
March 31, 2026
Solids, total suspended
122% over limit
Discharged 584 kg/d against a permitted limit of 263 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
333% over limit
Discharged 78 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
442% over limit
Discharged 2140 kg/d against a permitted limit of 395 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
88% over limit
Discharged 22.6 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Solids, total suspended
50% over limit
Discharged 27 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
33% over limit
Discharged 16 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Solids, total suspended
33% over limit
Discharged 16 mg/L against a permitted limit of 12 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
11% over limit
Discharged 20 mg/L against a permitted limit of 18 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
May 31, 2025
Oxygen, dissolved [DO]
25% over limit
Discharged 4.11 mg/L against a permitted limit of 5.5 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
pH, minimum
0% over limit
Discharged 3.53 SU against a permitted limit of 6.5 SU (DAILY MN)
DMR, Limited - Numeric Violation
December 31, 2024
Molybdenum, sludge, total, dry weight [as Mo]
4% over limit
Discharged 78 mg/L against a permitted limit of 75 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2024
E. coli, MTEC-MF
1051% over limit
Discharged 3270 MPN/100mL against a permitted limit of 284 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
August 31, 2024
pH, minimum
0% over limit
Discharged 6.43 SU against a permitted limit of 6.5 SU (DAILY MN)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (4 days ago)