Clean Water Act discharge permit · NPDES CTP000084
UNIMETAL SURFACE FINISHING, LLC, Naugatuck, CT: NPDES CTP000084 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 22Pollutants under a numeric limit
- 14Pollutants with an effluent exceedance
UNIMETAL SURFACE FINISHING, LLC holds NPDES permit CTP000084. EPA’s file records it issued December 11, 2014 and expiring December 31, 2019. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | UNIMETAL SURFACE FINISHING, LLC |
|---|---|
| Permittee as filed | UNIMETAL SURFACE FINISHING, LLC |
| NPDES ID | CTP000084 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual industrial user permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | December 11, 2014 |
| Expiration date | December 31, 2019 |
| Issuing agency | CT DEP |
| Address | Naugatuck, CT 06770 |
| Other EPA IDs (FRS) | RCRA handler CTD001450006; ICIS-AIR source CT0000000900903022 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 22Pollutants on file
- 22Under a numeric limit
- 18With a violation of any kind
- 14With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Cyanide, free [amenable to chlorination] | 2 | 31 | 29 | July 31, 2026 | 5,100% over the limit |
| Zinc, total [as Zn] | 2 | 15 | 15 | June 30, 2025 | 802% over the limit |
| pH, maximum | 1 | 15 | 12 | May 31, 2026 | |
| Copper, total [as Cu] | 2 | 9 | 9 | June 30, 2026 | 200% over the limit |
| pH | 2 | 16 | 6 | July 31, 2024 | |
| Cyanide, total [as CN] | 2 | 12 | 6 | June 30, 2026 | 212% over the limit |
| Silver, total [as Ag] | 2 | 3 | 3 | June 30, 2019 | 35% over the limit |
| Flow rate | 2 | 6 | 2 | April 30, 2003 | 2% over the limit |
| Flow, maximum during 24 hr period | 2 | 6 | 2 | September 30, 2004 | 195% over the limit |
| pH, minimum | 1 | 5 | 2 | March 31, 2025 | |
| Chromium, hexavalent [as Cr] | 2 | 9 | 1 | July 31, 2004 | 500% over the limit |
| Oil petroleum, total recoverable | 2 | 9 | 1 | October 31, 2007 | 1% over the limit |
| Flow | 1 | 6 | 1 | August 31, 2004 | 3% over the limit |
| Chromium, total [as Cr] | 2 | 4 | 1 | March 31, 2005 | 110% over the limit |
| Organics, total toxic [TTO] | 1 | 5 | 0 | ||
| Cadmium, total [as Cd] | 2 | 4 | 0 | ||
| Lead, total [as Pb] | 2 | 4 | 0 | ||
| Gold, total [as Au] | 2 | 2 | 0 | ||
| Nickel, total [as Ni] | 2 | 0 | 0 | ||
| Tin, total [as Sn] | 2 | 0 | 0 | ||
| Arsenic, total [as As] | 1 | 0 | 0 | ||
| Selenium, total [as Se] | 1 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 9Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| September 26, 2025 | Permit Violations - Discharge Without a Valid Permit | ST6 |
| September 26, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
| September 26, 2025 | Reporting Violations - Failure to Submit DMRs | ST6 |
| September 26, 2025 | Effluent Violations - Numeric effluent violation | ST6 |
| September 26, 2025 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| September 26, 2025 | Pretreatment - Failure to submit required report (non-DMR) | ST6 |
| March 20, 2024 | Effluent Violations - Numeric effluent violation | ST6 |
| March 20, 2024 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| March 20, 2024 | Reporting Violations - Failure to Notify | ST6 |
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID CTP000084 there.
Nearby on the register
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- Every permit record in Naugatuck, A to Z
- Discharge permits in Connecticut
- Every permit record in Connecticut, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.