RICHFIELD, CITY OF - RICHFIELD WWTP
NPDES ID: ID0021211
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: 1 effluent violation, 2 single-event violations.
Violations
April 30, 2026
Suspended solids, total annual
37% over limit
Discharged 13.53373989 kg/d against a permitted limit of 9.89719992 kg/d (ANNL AVG)
DMR, Limited - Numeric Violation
March 31, 2026
BOD, 5-day, 20 deg. C
5% over limit
Discharged 9.50675992 kg/d against a permitted limit of 9.07999992 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
22% over limit
Discharged 55 mg/L against a permitted limit of 45 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
pH
0% over limit
Discharged 6.18 SU against a permitted limit of 6.5 SU (INST MIN)
DMR, Limited - Numeric Violation
November 30, 2025
Temperature, water deg. centigrade
0% over limit
Discharged 5.9 deg C against a permitted limit of 0 deg C (MO AVG)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 9.14 SU against a permitted limit of 0 SU (INST MAX)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.06 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 5 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.06 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Temperature, water deg. centigrade
0% over limit
Discharged 5.9 deg C against a permitted limit of 0 deg C (MX DA AV)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 9.14 SU against a permitted limit of 0 SU (INST MIN)
DMR, Monitor Only - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 5 mg/L against a permitted limit of 0 mg/L (INST MIN)
DMR, Monitor Only - Overdue
April 30, 2025
Solids, total suspended
19% over limit
Discharged 53.5 mg/L against a permitted limit of 45 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
pH
0% over limit
Discharged 6.32 SU against a permitted limit of 6.5 SU (INST MIN)
DMR, Limited - Numeric Violation
February 28, 2025
Solids, total suspended
2% over limit
Discharged 46 mg/L against a permitted limit of 45 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2025
pH
0% over limit
Discharged 5.78 SU against a permitted limit of 6.5 SU (INST MIN)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 15, 2026 (11 hours ago)