CUSHING, CITY OF - SOUTH STP
NPDES ID: OK0026701
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
Violations
March 31, 2025
BOD, 5-day, 20 deg. C
20% over limit
Discharged 14.5 mg/L against a permitted limit of 12.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
2% over limit
Discharged 10.1 mg/L against a permitted limit of 9.86 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
114% over limit
Discharged 38.8 mg/L against a permitted limit of 18.1 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Whole Effluent Toxicity [WET] - C. dubia
2% over limit
Discharged 98 % against a permitted limit of 100 % (7 DA MIN)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
2% over limit
Discharged 12.32 mg/L against a permitted limit of 12.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
10% over limit
Discharged 19.9 mg/L against a permitted limit of 18.1 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
December 31, 2024
BOD, 5-day, 20 deg. C
62% over limit
Discharged 29.4 mg/L against a permitted limit of 18.1 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
30% over limit
Discharged 15.7 mg/L against a permitted limit of 12.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)