UNIMETAL SURFACE FINISHING, LLC
NPDES ID: CTP000084
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: 8 effluent violations.
Violations
June 30, 2026
Cyanide, total [as CN]
75% over limit
Discharged 2.1 mg/L against a permitted limit of 1.2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
20% over limit
Discharged 1.2 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Cyanide, free [amenable to chlorination]
2300% over limit
Discharged 0.48 mg/L against a permitted limit of 0.02 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
175% over limit
Discharged 5.5 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Cyanide, free [amenable to chlorination]
2244% over limit
Discharged 2.11 mg/L against a permitted limit of 0.09 mg/L (INST MAX)
DMR, Limited - Numeric Violation
May 31, 2026
pH, maximum
0% over limit
Discharged 10.4 SU against a permitted limit of 10 SU (INST MAX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
200% over limit
Discharged 6 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
138% over limit
Discharged 2.38 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Cadmium, total [as Cd]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.07 mg/L (MO AVG)
DMR, Limited - Overdue
Cadmium, total [as Cd]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.11 mg/L (DAILY MX)
DMR, Limited - Overdue
Chromium, total [as Cr]
0% over limit
Discharged 0 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Overdue
Cyanide, total [as CN]
0% over limit
Discharged 0.05 mg/L against a permitted limit of 1.2 mg/L (DAILY MX)
DMR, Limited - Overdue
Chromium, total [as Cr]
0% over limit
Discharged 0 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Overdue
Lead, total [as Pb]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.1 mg/L (MO AVG)
DMR, Limited - Overdue
Lead, total [as Pb]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.5 mg/L (DAILY MX)
DMR, Limited - Overdue
Cyanide, free [amenable to chlorination]
0% over limit
Discharged 0.05 mg/L against a permitted limit of 0.09 mg/L (INST MAX)
DMR, Limited - Overdue
June 30, 2025
Zinc, total [as Zn]
25% over limit
Discharged 2.5 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
pH, minimum
0% over limit
Discharged 3.5 SU against a permitted limit of 6 SU (INST MIN)
DMR, Limited - Numeric Violation
November 30, 2024
Zinc, total [as Zn]
20% over limit
Discharged 2.4 mg/L against a permitted limit of 2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2024
Oil petroleum, total recoverable
0% over limit
Discharged 13.8 mg/L against a permitted limit of 50 mg/L (MO AVG)
DMR, Limited - Overdue
Oil petroleum, total recoverable
0% over limit
Discharged 13.8 mg/L against a permitted limit of 100 mg/L (INST MAX)
DMR, Limited - Overdue
Lead, total [as Pb]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.1 mg/L (MO AVG)
DMR, Limited - Overdue
Cadmium, total [as Cd]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.11 mg/L (DAILY MX)
DMR, Limited - Overdue
Gold, total [as Au]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.5 mg/L (DAILY MX)
DMR, Limited - Overdue
pH
0% over limit
Discharged 7.1 SU against a permitted limit of 6 SU (INST MIN)
DMR, Limited - Overdue
Cyanide, free [amenable to chlorination]
2300% over limit
Discharged 0.48 mg/L against a permitted limit of 0.02 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Gold, total [as Au]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.1 mg/L (MO AVG)
DMR, Limited - Overdue
Cadmium, total [as Cd]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.07 mg/L (MO AVG)
DMR, Limited - Overdue
Cyanide, total [as CN]
58% over limit
Discharged 1.9 mg/L against a permitted limit of 1.2 mg/L (DAILY MX)
DMR, Limited - Overdue
Cyanide, total [as CN]
58% over limit
Discharged 1.9 mg/L against a permitted limit of 1.2 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chromium, hexavalent [as Cr]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.1 mg/L (MO AVG)
DMR, Limited - Overdue
Flow
0% over limit
Discharged 0.078985 MGD against a permitted limit of 0.202 MGD (DAILY MX)
DMR, Limited - Overdue
Lead, total [as Pb]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.5 mg/L (DAILY MX)
DMR, Limited - Overdue
Chromium, hexavalent [as Cr]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.2 mg/L (INST MAX)
DMR, Limited - Overdue
Cyanide, free [amenable to chlorination]
2033% over limit
Discharged 1.92 mg/L against a permitted limit of 0.09 mg/L (INST MAX)
DMR, Limited - Overdue
Cyanide, free [amenable to chlorination]
2033% over limit
Discharged 1.92 mg/L against a permitted limit of 0.09 mg/L (INST MAX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 15, 2026 (4 hours ago)