DEERFIELD TREATMENT PLANT
NPDES ID: WVG550886
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
Violations
March 31, 2026
BOD, 5-day, 20 deg. C
24% over limit
Discharged 24.8 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
148% over limit
Discharged 24.8 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
BOD, 5-day, 20 deg. C
206% over limit
Discharged 30.6 mg/L against a permitted limit of 10 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
22% over limit
Discharged 30.6 mg/L against a permitted limit of 25 mg/L (INST MAX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
53% over limit
Discharged 30.6 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
Oxygen, dissolved [DO]
10% over limit
Discharged 5.4 mg/L against a permitted limit of 6 mg/L (INST MIN)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
529% over limit
Discharged 78.6 mg/L against a permitted limit of 12.5 mg/L (INST MAX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
686% over limit
Discharged 78.6 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
1339% over limit
Discharged 71.95 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Chlorine, total residual
7% over limit
Discharged 0.03 mg/L against a permitted limit of 0.028 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
32% over limit
Discharged 7.93 mg/L against a permitted limit of 6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
7% over limit
Discharged 0.03 mg/L against a permitted limit of 0.028 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
BOD, 5-day, 20 deg. C
654% over limit
Discharged 37.7 mg/L against a permitted limit of 5 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
202% over limit
Discharged 37.7 mg/L against a permitted limit of 12.5 mg/L (INST MAX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
277% over limit
Discharged 37.7 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (5 days ago)