TISHOMINGO, CITY OF
NPDES ID: OK0031992
S — SNC: Compliance schedule violation
The facility missed a deadline in its compliance schedule by more than 90 days.
This quarter: 5 effluent violations.
Violations
May 31, 2026
Phosphorus, total [as P]
3% over limit
Discharged 4.91 mg/L against a permitted limit of 4.77 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
14% over limit
Discharged 6.05 mg/L against a permitted limit of 7 mg/L (MINIMUM)
DMR, Limited - Numeric Violation
April 30, 2026
Chlorine, total residual
1% over limit
Discharged 0.1 mg/L against a permitted limit of 0.099 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
18% over limit
Discharged 5.76 mg/L against a permitted limit of 7 mg/L (MINIMUM)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 6.08 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
118% over limit
Discharged 13.06 mg/L against a permitted limit of 6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
138% over limit
Discharged 21.4 mg/L against a permitted limit of 9 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
January 31, 2026
BOD, carbonaceous [5 day, 20 C]
61% over limit
Discharged 14.5 mg/L against a permitted limit of 9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
33% over limit
Discharged 30 mg/L against a permitted limit of 22.5 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
13% over limit
Discharged 16.9 mg/L against a permitted limit of 15 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
103% over limit
Discharged 12.2 mg/L against a permitted limit of 6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
120% over limit
Discharged 19.8 mg/L against a permitted limit of 9 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
91% over limit
Discharged 25.8 mg/L against a permitted limit of 13.5 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Phosphorus, total [as P]
13% over limit
Discharged 5.37 mg/L against a permitted limit of 4.77 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Solids, total suspended
7% over limit
Discharged 24 mg/L against a permitted limit of 22.5 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Nitrogen, ammonia total [as N]
22% over limit
Discharged 2.44 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
23% over limit
Discharged 3.68 mg/L against a permitted limit of 3 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Phosphorus, total [as P]
6% over limit
Discharged 5.065 mg/L against a permitted limit of 4.77 mg/L (MO AVG)
DMR, Limited - Numeric Violation
E. coli
60% over limit
Discharged 648.8 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2024
Phosphorus, total [as P]
9% over limit
Discharged 5.22 mg/L against a permitted limit of 4.77 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)