CITY OF WILLIAMSON
NPDES ID: WV0026271
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
Violations
February 28, 2026
Cyanide, weak acid, dissociable
72% over limit
Discharged 0.01 mg/L against a permitted limit of 0.0058 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Cyanide, weak acid, dissociable
150% over limit
Discharged 0.01 mg/L against a permitted limit of 0.004 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Bromodichloromethane, effluent
70% over limit
Discharged 0.0017 mg/L against a permitted limit of 0.001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Bromodichloromethane, effluent
6% over limit
Discharged 0.0017 mg/L against a permitted limit of 0.0016 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Cyanide, weak acid, dissociable
159% over limit
Discharged 0.015 mg/L against a permitted limit of 0.0058 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Cyanide, weak acid, dissociable
275% over limit
Discharged 0.015 mg/L against a permitted limit of 0.004 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Bromodichloromethane, effluent
110% over limit
Discharged 0.00336 mg/L against a permitted limit of 0.0016 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Bromodichloromethane, effluent
236% over limit
Discharged 0.00336 mg/L against a permitted limit of 0.001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Bromodichloromethane, effluent
63% over limit
Discharged 0.0026 mg/L against a permitted limit of 0.0016 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Bromodichloromethane, effluent
160% over limit
Discharged 0.0026 mg/L against a permitted limit of 0.001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Bromodichloromethane, effluent
370% over limit
Discharged 0.0047 mg/L against a permitted limit of 0.001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Bromodichloromethane, effluent
194% over limit
Discharged 0.0047 mg/L against a permitted limit of 0.0016 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
1900% over limit
Discharged 1 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Coliform, fecal general
505% over limit
Discharged 2420 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2025
Bromodichloromethane, effluent
119% over limit
Discharged 0.0035 mg/L against a permitted limit of 0.0016 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Bromodichloromethane, effluent
250% over limit
Discharged 0.0035 mg/L against a permitted limit of 0.001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Bromodichloromethane, effluent
19% over limit
Discharged 0.0019 mg/L against a permitted limit of 0.0016 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Bromodichloromethane, effluent
90% over limit
Discharged 0.0019 mg/L against a permitted limit of 0.001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Bromodichloromethane, effluent
6% over limit
Discharged 0.0017 mg/L against a permitted limit of 0.0016 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Bromodichloromethane, effluent
70% over limit
Discharged 0.0017 mg/L against a permitted limit of 0.001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Copper, total [as Cu]
90% over limit
Discharged 0.060382 kg/d against a permitted limit of 0.03178 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
43% over limit
Discharged 0.0454 kg/d against a permitted limit of 0.03178 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Bromodichloromethane, effluent
44% over limit
Discharged 0.0023 mg/L against a permitted limit of 0.0016 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Bromodichloromethane, effluent
130% over limit
Discharged 0.0023 mg/L against a permitted limit of 0.001 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
April 30, 2025
Bromodichloromethane, effluent
19% over limit
Discharged 0.0019 mg/L against a permitted limit of 0.0016 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Cyanide, weak acid, dissociable
275% over limit
Discharged 0.015 mg/L against a permitted limit of 0.004 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Bromodichloromethane, effluent
90% over limit
Discharged 0.0019 mg/L against a permitted limit of 0.001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Cyanide, weak acid, dissociable
159% over limit
Discharged 0.015 mg/L against a permitted limit of 0.0058 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
Zinc, total [as Zn]
37% over limit
Discharged 0.043584 kg/d against a permitted limit of 0.03178 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
Bromodichloromethane, effluent
44% over limit
Discharged 0.0023 mg/L against a permitted limit of 0.0016 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
443% over limit
Discharged 0.17252 kg/d against a permitted limit of 0.03178 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Bromodichloromethane, effluent
130% over limit
Discharged 0.0023 mg/L against a permitted limit of 0.001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Bromodichloromethane, effluent
240% over limit
Discharged 0.0034 mg/L against a permitted limit of 0.001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Bromodichloromethane, effluent
113% over limit
Discharged 0.0034 mg/L against a permitted limit of 0.0016 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2024
Bromodichloromethane, effluent
256% over limit
Discharged 0.0057 mg/L against a permitted limit of 0.0016 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Bromodichloromethane, effluent
470% over limit
Discharged 0.0057 mg/L against a permitted limit of 0.001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2024
Nitrogen, ammonia total [as N]
36% over limit
Discharged 30 mg/L against a permitted limit of 22 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
18% over limit
Discharged 13 mg/L against a permitted limit of 11 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2024
Bromodichloromethane, effluent
88% over limit
Discharged 0.003 mg/L against a permitted limit of 0.0016 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Bromodichloromethane, effluent
200% over limit
Discharged 0.003 mg/L against a permitted limit of 0.001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)