MARSHALLVILLE WWTP
NPDES ID: OH0022624
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: 10 effluent violations.
Violations
May 31, 2026
Nitrogen, ammonia total [as N]
787% over limit
Discharged 8.87 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
19% over limit
Discharged 10 kg/d against a permitted limit of 8.37 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
536% over limit
Discharged 8.9 mg/L against a permitted limit of 1.4 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
109% over limit
Discharged 1.44 kg/d against a permitted limit of 0.689 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
752% over limit
Discharged 2420 MPN/100mL against a permitted limit of 284 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
13% over limit
Discharged 142 MPN/100mL against a permitted limit of 126 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 6.3 SU against a permitted limit of 6.5 SU (DAILY MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
182% over limit
Discharged 1.39 kg/d against a permitted limit of 0.493 kg/d (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Solids, total suspended
47% over limit
Discharged 25 mg/L against a permitted limit of 17 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
9% over limit
Discharged 12 mg/L against a permitted limit of 11 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Solids, total suspended
53% over limit
Discharged 8.3 kg/d against a permitted limit of 5.42 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total dissolved- 180 deg. C
9% over limit
Discharged 830 kg/d against a permitted limit of 761 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total dissolved- 180 deg. C
36% over limit
Discharged 2100 mg/L against a permitted limit of 1545 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
175% over limit
Discharged 23 kg/d against a permitted limit of 8.37 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
55% over limit
Discharged 17 mg/L against a permitted limit of 11 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
135% over limit
Discharged 40 mg/L against a permitted limit of 17 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
February 28, 2026
Solids, total dissolved- 180 deg. C
42% over limit
Discharged 2200 mg/L against a permitted limit of 1545 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Solids, total suspended
24% over limit
Discharged 21 mg/L against a permitted limit of 17 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total dissolved- 180 deg. C
6% over limit
Discharged 810 kg/d against a permitted limit of 761 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total dissolved- 180 deg. C
55% over limit
Discharged 2400 mg/L against a permitted limit of 1545 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Solids, total dissolved- 180 deg. C
23% over limit
Discharged 1900 mg/L against a permitted limit of 1545 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Solids, total suspended
71% over limit
Discharged 29 mg/L against a permitted limit of 17 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
18% over limit
Discharged 13 mg/L against a permitted limit of 11 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total dissolved- 180 deg. C
29% over limit
Discharged 2000 mg/L against a permitted limit of 1545 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Solids, total dissolved- 180 deg. C
42% over limit
Discharged 2200 mg/L against a permitted limit of 1545 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Solids, total dissolved- 180 deg. C
42% over limit
Discharged 2200 mg/L against a permitted limit of 1545 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Phosphorus, total [as P]
83% over limit
Discharged 0.902 kg/d against a permitted limit of 0.493 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
40% over limit
Discharged 0.69 kg/d against a permitted limit of 0.493 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
22% over limit
Discharged 0.902 kg/d against a permitted limit of 0.739 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
31% over limit
Discharged 1.31 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total dissolved- 180 deg. C
71% over limit
Discharged 1300 kg/d against a permitted limit of 761 kg/d (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Phosphorus, total [as P]
103% over limit
Discharged 2.03 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
35% over limit
Discharged 2.03 mg/L against a permitted limit of 1.5 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total dissolved- 180 deg. C
21% over limit
Discharged 920 kg/d against a permitted limit of 761 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total dissolved- 180 deg. C
107% over limit
Discharged 3200 mg/L against a permitted limit of 1545 mg/L (MO AVG)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
752% over limit
Discharged 2420 MPN/100mL against a permitted limit of 284 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
18% over limit
Discharged 0.584 kg/d against a permitted limit of 0.493 kg/d (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Phosphorus, total [as P]
12% over limit
Discharged 0.55 kg/d against a permitted limit of 0.493 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
8% over limit
Discharged 9 kg/d against a permitted limit of 8.37 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
549% over limit
Discharged 1842 MPN/100mL against a permitted limit of 284 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
April 30, 2025
BOD, carbonaceous [5 day, 20 C]
74% over limit
Discharged 11.9 kg/d against a permitted limit of 6.84 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
January 31, 2025
Nitrogen, ammonia total [as N]
58% over limit
Discharged 6.47 mg/L against a permitted limit of 4.1 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
12% over limit
Discharged 3.25 mg/L against a permitted limit of 2.9 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Solids, total dissolved- 180 deg. C
2% over limit
Discharged 1570 mg/L against a permitted limit of 1545 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Solids, total dissolved- 180 deg. C
1% over limit
Discharged 1560 mg/L against a permitted limit of 1545 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
E. coli, MTEC-MF
294% over limit
Discharged 1120 MPN/100mL against a permitted limit of 284 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
Solids, total dissolved- 180 deg. C
31% over limit
Discharged 2020 mg/L against a permitted limit of 1545 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2024
Solids, total dissolved- 180 deg. C
18% over limit
Discharged 1820 mg/L against a permitted limit of 1545 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)