WELLSVILLE, CITY OF (WWTP)
NPDES ID: KS0097110
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
This quarter: 5 effluent violations.
Violations
April 30, 2026
BOD, 5-day, 20 deg. C
21% over limit
Discharged 36.3 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
209% over limit
Discharged 26.3 mg/L against a permitted limit of 8.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
240% over limit
Discharged 153 mg/L against a permitted limit of 45 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
651% over limit
Discharged 26.3 mg/L against a permitted limit of 3.5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
410% over limit
Discharged 153 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
40% over limit
Discharged 7.4 mg/L against a permitted limit of 5.3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrogen, ammonia total [as N]
287% over limit
Discharged 29 mg/L against a permitted limit of 7.5 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
E. coli
417% over limit
Discharged 19863 MPN/100mL against a permitted limit of 3843 MPN/100mL (MO GEO)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
6% over limit
Discharged 47.9 mg/L against a permitted limit of 45 mg/L (MX WK AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
60% over limit
Discharged 47.9 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
806% over limit
Discharged 29 mg/L against a permitted limit of 3.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, ammonia total [as N]
33% over limit
Discharged 2.4 mg/L against a permitted limit of 1.8 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.13384 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 1.84206412 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Phosphorus, Total As P
0% over limit
Discharged 1.50196819 kg/d against a permitted limit of 0 kg/d (DPD AVG)
DMR, Monitor Only - Overdue
Nitrogen, Total As N
0% over limit
Discharged 4.76862982 kg/d against a permitted limit of 0 kg/d (DPD AVG)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0.10157796 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
January 31, 2025
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.12252 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, Total As N
0% over limit
Discharged 5.40692203 kg/d against a permitted limit of 0 kg/d (DPD AVG)
DMR, Monitor Only - Overdue
Phosphorus, Total As P
0% over limit
Discharged 1.37293231 kg/d against a permitted limit of 0 kg/d (DPD AVG)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 1.48 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 6.3 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Phosphorus, Total As P
0% over limit
Discharged 3.108 mg/L against a permitted limit of 0 mg/L (DAILY AV)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0.5771929 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 4.05594971 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
December 31, 2024
Phosphorus, Total As P
0% over limit
Discharged 3.515 mg/L against a permitted limit of 0 mg/L (DAILY AV)
DMR, Monitor Only - Overdue
Phosphorus, Total As P
0% over limit
Discharged 1.53294007 kg/d against a permitted limit of 0 kg/d (DPD AVG)
DMR, Monitor Only - Overdue
Nitrogen, Total As N
0% over limit
Discharged 5.53865013 kg/d against a permitted limit of 0 kg/d (DPD AVG)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.11771 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 5.69 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0.96097725 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 2.7 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 6.94039782 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
November 30, 2024
Nitrogen, Total As N
0% over limit
Discharged 4.51608778 kg/d against a permitted limit of 0 kg/d (DPD AVG)
DMR, Monitor Only - Overdue
Phosphorus, Total As P
0% over limit
Discharged 1.63906711 kg/d against a permitted limit of 0 kg/d (DPD AVG)
DMR, Monitor Only - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 5.67726995 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.1228 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 1.70318099 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Phosphorus, Total As P
0% over limit
Discharged 3.78667 mg/L against a permitted limit of 0 mg/L (DAILY AV)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 3.06 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 6.34 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
October 31, 2024
Nitrogen, total [as N]
0% over limit
Discharged 4.62238734 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.10881 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Phosphorus, Total As P
0% over limit
Discharged 1.73078873 kg/d against a permitted limit of 0 kg/d (DPD AVG)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 1.35703323 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, Total As N
0% over limit
Discharged 4.3999682 kg/d against a permitted limit of 0 kg/d (DPD AVG)
DMR, Monitor Only - Overdue
September 30, 2024
Nitrogen, Total As N
0% over limit
Discharged 4.30751564 kg/d against a permitted limit of 0 kg/d (DPD AVG)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 1.98897398 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Phosphorus, Total As P
0% over limit
Discharged 2.15375782 kg/d against a permitted limit of 0 kg/d (DPD AVG)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.11153 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 3.97794797 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)