MIDWEST CITY, CITY OF - NORTH
NPDES ID: OK0026841
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: 6 effluent violations.
Violations
May 31, 2026
Nitrogen, ammonia total [as N]
9% over limit
Discharged 10.8 mg/L against a permitted limit of 9.9 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
6% over limit
Discharged 167.48059859 kg/d against a permitted limit of 158.44599867 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
85% over limit
Discharged 7.6 mg/L against a permitted limit of 4.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, ammonia total [as N]
64% over limit
Discharged 16.2 mg/L against a permitted limit of 9.9 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
127% over limit
Discharged 9.3 mg/L against a permitted limit of 4.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
31% over limit
Discharged 207.06939826 kg/d against a permitted limit of 158.44599867 kg/d (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
10% over limit
Discharged 10.9 mg/L against a permitted limit of 9.9 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
49% over limit
Discharged 6.1 mg/L against a permitted limit of 4.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
88% over limit
Discharged 7.7 mg/L against a permitted limit of 4.1 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 9.9 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
4% over limit
Discharged 164.34799862 kg/d against a permitted limit of 158.44599867 kg/d (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
17% over limit
Discharged 4.8 mg/L against a permitted limit of 4.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
E. coli
251% over limit
Discharged 1427 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
E. coli
124% over limit
Discharged 282 MPN/100mL against a permitted limit of 126 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
E. coli
138% over limit
Discharged 966 MPN/100mL against a permitted limit of 406 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
15% over limit
Discharged 4.7 mg/L against a permitted limit of 4.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Nitrogen, ammonia total [as N]
2% over limit
Discharged 4.2 mg/L against a permitted limit of 4.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
30% over limit
Discharged 12.9 mg/L against a permitted limit of 9.9 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
44% over limit
Discharged 5.9 mg/L against a permitted limit of 4.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (7 days ago)