CITY OF THOMAS
NPDES ID: WV0024856
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: 5 effluent violations.
Violations
May 31, 2026
BOD, 5-day, 20 deg. C
52% over limit
Discharged 33.5 mg/L against a permitted limit of 22 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
53% over limit
Discharged 2.8 mg/L against a permitted limit of 6 mg/L (INST MIN)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, ammonia total [as N]
36% over limit
Discharged 17.1 mg/L against a permitted limit of 12.6 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
28% over limit
Discharged 4.3 mg/L against a permitted limit of 6 mg/L (INST MIN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
100% over limit
Discharged 12.6 mg/L against a permitted limit of 6.3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
65% over limit
Discharged 10.375 mg/L against a permitted limit of 6.3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
31% over limit
Discharged 16.5 mg/L against a permitted limit of 12.6 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
93% over limit
Discharged 12.15 mg/L against a permitted limit of 6.3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
33% over limit
Discharged 16.8 mg/L against a permitted limit of 12.6 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
55% over limit
Discharged 9.75 mg/L against a permitted limit of 6.3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
32% over limit
Discharged 16.6 mg/L against a permitted limit of 12.6 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
103% over limit
Discharged 12.78 mg/L against a permitted limit of 6.3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, ammonia total [as N]
11% over limit
Discharged 14 mg/L against a permitted limit of 12.6 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
93% over limit
Discharged 12.175 mg/L against a permitted limit of 6.3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
77% over limit
Discharged 53.15 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
1% over limit
Discharged 30.25 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrogen, ammonia total [as N]
44% over limit
Discharged 6.08359995 kg/d against a permitted limit of 4.22219996 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
113% over limit
Discharged 7.88 mg/L against a permitted limit of 3.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
81% over limit
Discharged 13.4 mg/L against a permitted limit of 7.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
27% over limit
Discharged 4.4 mg/L against a permitted limit of 6 mg/L (INST MIN)
DMR, Limited - Numeric Violation
Copper, total recoverable
233% over limit
Discharged 0.044 mg/L against a permitted limit of 0.0132 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
Oxygen, dissolved [DO]
43% over limit
Discharged 3.4 mg/L against a permitted limit of 6 mg/L (INST MIN)
DMR, Limited - Numeric Violation
August 31, 2025
Oxygen, dissolved [DO]
13% over limit
Discharged 5.2 mg/L against a permitted limit of 6 mg/L (INST MIN)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, ammonia total [as N]
51% over limit
Discharged 5.6 mg/L against a permitted limit of 3.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
85% over limit
Discharged 13.7 mg/L against a permitted limit of 7.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
17% over limit
Discharged 5 mg/L against a permitted limit of 6 mg/L (INST MIN)
DMR, Limited - Numeric Violation
June 30, 2025
Nitrogen, ammonia total [as N]
46% over limit
Discharged 10.8 mg/L against a permitted limit of 7.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
94% over limit
Discharged 7.175 mg/L against a permitted limit of 3.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
BOD, 5-day, percent removal
59% over limit
Discharged 76.1 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
116% over limit
Discharged 4.51275996 kg/d against a permitted limit of 2.08839998 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
84% over limit
Discharged 40.5 mg/L against a permitted limit of 22 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
331% over limit
Discharged 15.95 mg/L against a permitted limit of 3.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
162% over limit
Discharged 19.4 mg/L against a permitted limit of 7.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
32% over limit
Discharged 5.58419995 kg/d against a permitted limit of 4.22219996 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2025
Nitrogen, ammonia total [as N]
72% over limit
Discharged 21.7 mg/L against a permitted limit of 12.6 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
40% over limit
Discharged 17.6 mg/L against a permitted limit of 12.6 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
11% over limit
Discharged 7.99039993 kg/d against a permitted limit of 7.17319994 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
122% over limit
Discharged 14 mg/L against a permitted limit of 6.3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Nitrogen, ammonia total [as N]
7% over limit
Discharged 6.725 mg/L against a permitted limit of 6.3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Nitrogen, ammonia total [as N]
64% over limit
Discharged 10.32 mg/L against a permitted limit of 6.3 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
5% over limit
Discharged 13.2 mg/L against a permitted limit of 12.6 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
26% over limit
Discharged 37.8 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
20% over limit
Discharged 82 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
November 30, 2024
BOD, 5-day, 20 deg. C
11% over limit
Discharged 33.25 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Nitrogen, ammonia total [as N]
26% over limit
Discharged 9.3 mg/L against a permitted limit of 7.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, percent removal
260% over limit
Discharged 46 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Copper, total recoverable
47% over limit
Discharged 0.01 mg/L against a permitted limit of 0.0068 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
33% over limit
Discharged 80 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
16% over limit
Discharged 4.3 mg/L against a permitted limit of 3.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0.330512 kg/d against a permitted limit of 24.96999979 kg/d (DAILY MX)
DMR, Limited - Overdue
Copper, total recoverable
0% over limit
Discharged 0.0057 mg/L against a permitted limit of 0.0068 mg/L (MO AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0.456724 kg/d against a permitted limit of 17.02499986 kg/d (MO AVG)
DMR, Limited - Overdue
Coliform, fecal general
0% over limit
Discharged 5 MPN/100mL against a permitted limit of 200 MPN/100mL (MO GEOMN)
DMR, Limited - Overdue
BOD, 5-day, percent removal
0% over limit
Discharged 98 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Overdue
Iron, total recoverable
0% over limit
Discharged 0.31 mg/L against a permitted limit of 2.2 mg/L (DAILY MX)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 6.8 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 8.5 mg/L against a permitted limit of 60 mg/L (DAILY MX)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 6.7 mg/L against a permitted limit of 6 mg/L (INST MIN)
DMR, Limited - Overdue
Iron, total recoverable
0% over limit
Discharged 0.31 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 6.8 SU against a permitted limit of 6 SU (INST MIN)
DMR, Limited - Overdue
Hardness, total [as CaCO3]
0% over limit
Discharged 72.9 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 2.975 mg/L against a permitted limit of 3.7 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.237896 kg/d against a permitted limit of 2.08839998 kg/d (MO AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.316438 kg/d against a permitted limit of 4.22219996 kg/d (DAILY MX)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 4.4 mg/L against a permitted limit of 7.4 mg/L (DAILY MX)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.02 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 6.75 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 4.1 mg/L against a permitted limit of 22 mg/L (MO AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.033 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Hardness, total [as CaCO3]
0% over limit
Discharged 72.9 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0.301456 kg/d against a permitted limit of 12.4849999 kg/d (MO AVG)
DMR, Limited - Overdue
Solids, suspended percent removal
0% over limit
Discharged 98 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Overdue
pH
0% over limit
Discharged 6.8 SU against a permitted limit of 9 SU (INST MAX)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 4.6 mg/L against a permitted limit of 44 mg/L (DAILY MX)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 0.001 mg/L against a permitted limit of 0.012 mg/L (MO AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 6.25 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0.61108399 kg/d against a permitted limit of 34.04999971 kg/d (DAILY MX)
DMR, Limited - Overdue
Copper, total recoverable
0% over limit
Discharged 0.0057 mg/L against a permitted limit of 0.0132 mg/L (DAILY MX)
DMR, Limited - Overdue
Coliform, fecal general
0% over limit
Discharged 5 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 0.001 mg/L against a permitted limit of 0.025 mg/L (DAILY MX)
DMR, Limited - Overdue
August 31, 2024
Solids, total suspended
0% over limit
Discharged 6 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 6.6 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
95% over limit
Discharged 7.2 mg/L against a permitted limit of 3.7 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
95% over limit
Discharged 7.2 mg/L against a permitted limit of 3.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.66102399 kg/d against a permitted limit of 4.22219996 kg/d (DAILY MX)
DMR, Limited - Overdue
Copper, total recoverable
0% over limit
Discharged 0.0069 mg/L against a permitted limit of 0.0132 mg/L (DAILY MX)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
31% over limit
Discharged 9.7 mg/L against a permitted limit of 7.4 mg/L (DAILY MX)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
31% over limit
Discharged 9.7 mg/L against a permitted limit of 7.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Iron, total recoverable
0% over limit
Discharged 0.82 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0.66147799 kg/d against a permitted limit of 24.96999979 kg/d (DAILY MX)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.023 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0.487142 kg/d against a permitted limit of 12.4849999 kg/d (MO AVG)
DMR, Limited - Overdue
Solids, suspended percent removal
0% over limit
Discharged 96 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 6.2 mg/L against a permitted limit of 6 mg/L (INST MIN)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 7.6 mg/L against a permitted limit of 44 mg/L (DAILY MX)
DMR, Limited - Overdue
Copper, total recoverable
1% over limit
Discharged 0.0069 mg/L against a permitted limit of 0.0068 mg/L (MO AVG)
DMR, Limited - Overdue
Copper, total recoverable
1% over limit
Discharged 0.0069 mg/L against a permitted limit of 0.0068 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
0% over limit
Discharged 6.5 mg/L against a permitted limit of 60 mg/L (DAILY MX)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0.565684 kg/d against a permitted limit of 34.04999971 kg/d (DAILY MX)
DMR, Limited - Overdue
Coliform, fecal general
0% over limit
Discharged 5 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Overdue
pH
0% over limit
Discharged 7.08 SU against a permitted limit of 6 SU (INST MIN)
DMR, Limited - Overdue
Coliform, fecal general
0% over limit
Discharged 5 MPN/100mL against a permitted limit of 200 MPN/100mL (MO GEOMN)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 0.001 mg/L against a permitted limit of 0.012 mg/L (MO AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 7.08 SU against a permitted limit of 9 SU (INST MAX)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 6.1 mg/L against a permitted limit of 22 mg/L (MO AVG)
DMR, Limited - Overdue
BOD, 5-day, percent removal
0% over limit
Discharged 98 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0.46989 kg/d against a permitted limit of 17.02499986 kg/d (MO AVG)
DMR, Limited - Overdue
Iron, total recoverable
0% over limit
Discharged 0.82 mg/L against a permitted limit of 2.2 mg/L (DAILY MX)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 6.8 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Chlorine, total residual
0% over limit
Discharged 0.001 mg/L against a permitted limit of 0.025 mg/L (DAILY MX)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.113 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.519376 kg/d against a permitted limit of 2.08839998 kg/d (MO AVG)
DMR, Limited - Overdue
July 31, 2024
Oxygen, dissolved [DO]
3% over limit
Discharged 5.8 mg/L against a permitted limit of 6 mg/L (INST MIN)
DMR, Limited - Numeric Violation
Iron, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
26% over limit
Discharged 9.3 mg/L against a permitted limit of 7.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Iron, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 2.2 mg/L (DAILY MX)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
77% over limit
Discharged 6.55 mg/L against a permitted limit of 3.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)