OKEMAH UTILITIES AUTHORITY
NPDES ID: OK0020737
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
This quarter: 1 effluent violation.
Violations
May 31, 2026
E. coli
79% over limit
Discharged 727 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
E. coli
496% over limit
Discharged 2420 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2025
E. coli
496% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
E. coli
34% over limit
Discharged 169.34 MPN/100mL against a permitted limit of 126 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
July 31, 2025
E. coli
496% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
E. coli
496% over limit
Discharged 2420 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
E. coli
496% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2024
E. coli
496% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
498% over limit
Discharged 23.9 mg/L against a permitted limit of 4 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
2% over limit
Discharged 10.2 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
89% over limit
Discharged 28.3 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
425% over limit
Discharged 31.5 mg/L against a permitted limit of 6 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
127% over limit
Discharged 17.75139985 kg/d against a permitted limit of 7.8088 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
122% over limit
Discharged 50 mg/L against a permitted limit of 22.5 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
July 31, 2024
E. coli
196% over limit
Discharged 1203.3 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)