Clean Water Act discharge permit · NPDES CT0025305
UNIMETAL SURFACE FINISHING LLC, Thomaston, CT: NPDES CT0025305 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 0Pollutants under a numeric limit
- 17Pollutants with an effluent exceedance
UNIMETAL SURFACE FINISHING LLC, held by QUALITY ROLLING & DEBURRING CO, holds NPDES permit CT0025305, which discharges to Naugatuck River. EPA’s file records it issued September 27, 1999 and expiring September 26, 2004. 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 | QUALITY ROLLING & DEBURRING CO |
| NPDES ID | CT0025305 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | September 27, 1999 |
| Expiration date | September 26, 2004 |
| Address | Thomaston, CT 06787 |
| Receiving water | NAUGATUCK RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Northfield Brook-Naugatuck River (HUC 011000051105) |
| SIC | 3471 – Plating And Polishing |
| Other EPA IDs (FRS) | RCRA handler CTD981213101; ICIS-AIR source CT0000000900501201 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 32Pollutants on file
- 0Under a numeric limit
- 32With a violation of any kind
- 17With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 0 | 67 | 66 | January 31, 2021 | 205% over the limit |
| Zinc, total [as Zn] | 0 | 55 | 52 | April 30, 2021 | 595% over the limit |
| Nitrogen, total [as N] | 0 | 44 | 42 | December 31, 2020 | 110% over the limit |
| % Survival Static 48Hr Acute Pimephales promelas | 0 | 29 | 27 | March 31, 2021 | 100% over the limit |
| Nickel, total [as Ni] | 0 | 28 | 25 | January 31, 2021 | 309% over the limit |
| %Surv Static 48Hr Acute Daphnia Pulex | 0 | 27 | 25 | March 31, 2021 | 100% over the limit |
| Copper, total [as Cu] | 0 | 23 | 20 | December 31, 2020 | 66% over the limit |
| Fluoride, total [as F] | 0 | 22 | 18 | April 30, 2021 | 330% over the limit |
| Solids, total suspended | 0 | 19 | 18 | April 30, 2021 | 317% over the limit |
| NOAEL Static 48Hr Acute D. pulex | 0 | 15 | 13 | March 31, 2021 | 100% over the limit |
| NOAEL Static 48Hr Acute Pimephales promelas | 0 | 14 | 12 | March 31, 2021 | 100% over the limit |
| Cyanide, total [as CN] | 0 | 8 | 6 | March 31, 2019 | 329% over the limit |
| Flow, maximum during 24 hr period | 0 | 4 | 4 | March 31, 2003 | 5,713% over the limit |
| Flow rate | 0 | 3 | 3 | October 31, 2002 | 6% over the limit |
| Flow | 0 | 3 | 3 | March 31, 2003 | 5,429% over the limit |
| Lead, total [as Pb] | 0 | 5 | 1 | January 31, 2020 | 81% over the limit |
| Aluminum, total [as Al] | 0 | 4 | 1 | April 30, 2002 | 14% over the limit |
| Silver, total [as Ag] | 0 | 8 | 0 | ||
| Nitrogen, ammonia total [as N] | 0 | 4 | 0 | ||
| Phosphorus, total [as P] | 0 | 4 | 0 | ||
| Cadmium, total [as Cd] | 0 | 4 | 0 | ||
| Nitrogen, nitrite total [as N] | 0 | 2 | 0 | ||
| Nitrogen, nitrate total [as N] | 0 | 2 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 0 | 2 | 0 | ||
| Arsenic, total [as As] | 0 | 2 | 0 | ||
| Boron, total [as B] | 0 | 2 | 0 | ||
| Chromium, total [as Cr] | 0 | 2 | 0 | ||
| Iron, total [as Fe] | 0 | 2 | 0 | ||
| Tin, total [as Sn] | 0 | 2 | 0 | ||
| Surfactants [MBAS] | 0 | 2 | 0 | ||
| Gold, total [as Au] | 0 | 2 | 0 | ||
| Organics, total toxic [TTO] | 0 | 2 | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 24, 2017 | Reporting Violations - Improper/ Incorrect Reporting | 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.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.