EXPRESS MART I-55 MOTOR PLAZA
NPDES ID: MOG940250
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: 9 effluent violations.
Violations
May 31, 2026
Nitrogen, ammonia total [as N]
338% over limit
Discharged 4.38 mg/L against a permitted limit of 1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 6.1 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
338% over limit
Discharged 4.38 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Solids, total suspended
220% over limit
Discharged 96 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
2420% over limit
Discharged 25.2 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
92% over limit
Discharged 96 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Oxygen demand, chem. [high level] [COD]
23% over limit
Discharged 147 mg/L against a permitted limit of 120 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Oxygen demand, chem. [high level] [COD]
63% over limit
Discharged 147 mg/L against a permitted limit of 90 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
2420% over limit
Discharged 25.2 mg/L against a permitted limit of 1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
Solids, total suspended
350% over limit
Discharged 135 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen demand, chem. [high level] [COD]
39% over limit
Discharged 125 mg/L against a permitted limit of 90 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
170% over limit
Discharged 135 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Oxygen demand, chem. [high level] [COD]
4% over limit
Discharged 125 mg/L against a permitted limit of 120 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, ammonia total [as N]
544% over limit
Discharged 6.44 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
617% over limit
Discharged 215 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
544% over limit
Discharged 6.44 mg/L against a permitted limit of 1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Oxygen demand, chem. [high level] [COD]
122% over limit
Discharged 200 mg/L against a permitted limit of 90 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen demand, chem. [high level] [COD]
67% over limit
Discharged 200 mg/L against a permitted limit of 120 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
330% over limit
Discharged 215 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2025
Oil and grease [soxhlet extr.] tot.
227% over limit
Discharged 49 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Oil and grease [soxhlet extr.] tot.
390% over limit
Discharged 49 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen demand, chem. [high level] [COD]
62% over limit
Discharged 146 mg/L against a permitted limit of 90 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
14400% over limit
Discharged 145 mg/L against a permitted limit of 1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
14400% over limit
Discharged 145 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen demand, chem. [high level] [COD]
22% over limit
Discharged 146 mg/L against a permitted limit of 120 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, ammonia total [as N]
2700% over limit
Discharged 28 mg/L against a permitted limit of 1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
2700% over limit
Discharged 28 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Nitrogen, ammonia total [as N]
549% over limit
Discharged 6.49 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
549% over limit
Discharged 6.49 mg/L against a permitted limit of 1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
Nitrogen, ammonia total [as N]
435% over limit
Discharged 5.35 mg/L against a permitted limit of 1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
435% over limit
Discharged 5.35 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Nitrogen, ammonia total [as N]
203% over limit
Discharged 3.03 mg/L against a permitted limit of 1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
114% over limit
Discharged 107 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
257% over limit
Discharged 107 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
203% over limit
Discharged 3.03 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Oxygen demand, chem. [high level] [COD]
128% over limit
Discharged 273 mg/L against a permitted limit of 120 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Oxygen demand, chem. [high level] [COD]
203% over limit
Discharged 273 mg/L against a permitted limit of 90 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
440% over limit
Discharged 270 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
800% over limit
Discharged 270 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Oxygen demand, chem. [high level] [COD]
13% over limit
Discharged 102 mg/L against a permitted limit of 90 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
910% over limit
Discharged 10.1 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
910% over limit
Discharged 10.1 mg/L against a permitted limit of 1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2024
Solids, total suspended
166% over limit
Discharged 133 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
343% over limit
Discharged 133 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2024
Nitrogen, ammonia total [as N]
100% over limit
Discharged 2 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen demand, chem. [high level] [COD]
2% over limit
Discharged 92 mg/L against a permitted limit of 90 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
100% over limit
Discharged 2 mg/L against a permitted limit of 1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
127% over limit
Discharged 68 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
36% over limit
Discharged 68 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)