MIDLAND MARKETING SYSTEMS WWTF
NPDES ID: MO0138932
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: 2 effluent violations.
Violations
June 30, 2026
Nitrogen, ammonia total [as N]
992% over limit
Discharged 6.55 mg/L against a permitted limit of 0.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
285% over limit
Discharged 6.55 mg/L against a permitted limit of 1.7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
201% over limit
Discharged 6.32 mg/L against a permitted limit of 2.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
13% over limit
Discharged 6.32 mg/L against a permitted limit of 5.6 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
Solids, total suspended
900% over limit
Discharged 100 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
567% over limit
Discharged 100 mg/L against a permitted limit of 15 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
13% over limit
Discharged 17 mg/L against a permitted limit of 15 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
E. coli
2837% over limit
Discharged 3700 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
70% over limit
Discharged 17 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
BOD, 5-day, 20 deg. C
60% over limit
Discharged 16 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
500% over limit
Discharged 3.6 mg/L against a permitted limit of 0.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
7% over limit
Discharged 16 mg/L against a permitted limit of 15 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
60% over limit
Discharged 16 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
112% over limit
Discharged 3.6 mg/L against a permitted limit of 1.7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
7% over limit
Discharged 16 mg/L against a permitted limit of 15 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
E. coli
59% over limit
Discharged 200 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
Nitrogen, ammonia total [as N]
397% over limit
Discharged 2.98 mg/L against a permitted limit of 0.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
75% over limit
Discharged 2.98 mg/L against a permitted limit of 1.7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
303% over limit
Discharged 22.59 mg/L against a permitted limit of 5.6 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
976% over limit
Discharged 22.59 mg/L against a permitted limit of 2.1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
BOD, 5-day, 20 deg. C
360% over limit
Discharged 46 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
171% over limit
Discharged 4.6 mg/L against a permitted limit of 1.7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
1240% over limit
Discharged 134 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
793% over limit
Discharged 134 mg/L against a permitted limit of 15 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
207% over limit
Discharged 46 mg/L against a permitted limit of 15 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
E. coli
535% over limit
Discharged 800 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
667% over limit
Discharged 4.6 mg/L against a permitted limit of 0.6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 16, 2026 (yesterday)