WOODSTOCK W W T P
NPDES ID: NHG580020
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: 2 effluent violations.
Violations
May 31, 2026
Copper, total [as Cu]
204% over limit
Discharged 0.0073 mg/L against a permitted limit of 0.0024 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Copper, total [as Cu]
88% over limit
Discharged 0.0045 mg/L against a permitted limit of 0.0024 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Copper, total [as Cu]
171% over limit
Discharged 0.0065 mg/L against a permitted limit of 0.0024 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Copper, total [as Cu]
188% over limit
Discharged 0.0069 mg/L against a permitted limit of 0.0024 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Copper, total [as Cu]
175% over limit
Discharged 0.0066 mg/L against a permitted limit of 0.0024 mg/L (MO AVG)
DMR, Limited - Numeric Violation
E. coli
24% over limit
Discharged 155.7 MPN/100mL against a permitted limit of 126 MPN/100mL (MO GEO)
DMR, Limited - Numeric Violation
December 31, 2025
Copper, total [as Cu]
108% over limit
Discharged 0.005 mg/L against a permitted limit of 0.0024 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Copper, total [as Cu]
238% over limit
Discharged 0.0081 mg/L against a permitted limit of 0.0024 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Copper, total [as Cu]
25% over limit
Discharged 0.012 mg/L against a permitted limit of 0.0096 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
400% over limit
Discharged 0.012 mg/L against a permitted limit of 0.0024 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Copper, total [as Cu]
108% over limit
Discharged 0.02 mg/L against a permitted limit of 0.0096 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Hardness, total [as CaCO3]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Copper, total [as Cu]
650% over limit
Discharged 0.018 mg/L against a permitted limit of 0.0024 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Copper, total [as Cu]
4% over limit
Discharged 0.01 mg/L against a permitted limit of 0.0096 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
317% over limit
Discharged 0.01 mg/L against a permitted limit of 0.0024 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Copper, total [as Cu]
83% over limit
Discharged 0.0044 mg/L against a permitted limit of 0.0024 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Copper, total [as Cu]
108% over limit
Discharged 0.005 mg/L against a permitted limit of 0.0024 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Copper, total [as Cu]
154% over limit
Discharged 0.0061 mg/L against a permitted limit of 0.0024 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Copper, total [as Cu]
167% over limit
Discharged 0.0064 mg/L against a permitted limit of 0.0024 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Chlorine, total residual
120% over limit
Discharged 2.2 mg/L against a permitted limit of 1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
Chlorine, total residual
53% over limit
Discharged 1.53 mg/L against a permitted limit of 1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Chlorine, total residual
21% over limit
Discharged 1.21 mg/L against a permitted limit of 1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Perfluorooctanesulfonic acid (PFOS)
0% over limit
Discharged 0.0000047 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorononanoic acid (PFNA)
0% over limit
Discharged 0.0000015 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorononanoic acid (PFNA)
0% over limit
Discharged 0.0000015 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorooctanesulfonic acid (PFOS)
0% over limit
Discharged 0.0000015 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
November 30, 2024
Chlorine, total residual
9% over limit
Discharged 1.09 mg/L against a permitted limit of 1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2024
Hardness, total [as CaCO3]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
LC50 Static 48Hr Acute Ceriodaphnia dubia
29% over limit
Discharged 70.71 % against a permitted limit of 100 % (MO AV MN)
DMR, Limited - Numeric Violation
August 31, 2024
pH
0% over limit
Discharged 6.3 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)