Clean Water Act discharge permit · NPDES CTP001646
GIERING METAL FINISHING, Hamden, CT: NPDES CTP001646 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 16Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
GIERING METAL FINISHING holds NPDES permit CTP001646, which discharges to New Haven Harbor. EPA’s file records it issued August 19, 2011 and expiring August 31, 2016. 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 | GIERING METAL FINISHING |
|---|---|
| Permittee as filed | GIERING METAL FINISHING |
| NPDES ID | CTP001646 |
| 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 | August 19, 2011 |
| Expiration date | August 31, 2016 |
| Issuing agency | CT DEP |
| Address | Hamden, CT 06517 |
| Receiving water | NEW HAVEN HARBOR |
| SIC | 3471 – Plating And Polishing |
| Other EPA IDs (FRS) | RCRA handler CTD001185164; ICIS-AIR source CT0000000900900013 |
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
- 17Pollutants on file
- 16Under a numeric limit
- 15With a violation of any kind
- 8With 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 |
|---|---|---|---|---|---|
| Zinc, total [as Zn] | 2 | 13 | 7 | December 31, 2023 | 156% over the limit |
| pH, minimum | 1 | 9 | 6 | May 31, 2024 | |
| Flow rate | 0 | 6 | 6 | November 30, 2007 | 13% over the limit |
| Flow, maximum during 24 hr period | 1 | 8 | 5 | May 31, 2026 | 51% over the limit |
| Lead, total [as Pb] | 2 | 7 | 3 | May 31, 2008 | 270% over the limit |
| Copper, total [as Cu] | 2 | 5 | 3 | June 30, 2019 | 40% over the limit |
| pH, maximum | 1 | 5 | 3 | December 31, 2024 | |
| pH | 2 | 12 | 1 | March 31, 2005 | |
| Cyanide, total [as CN] | 2 | 4 | 0 | ||
| Silver, total [as Ag] | 2 | 4 | 0 | ||
| Flow | 1 | 4 | 0 | ||
| Oil petroleum, total recoverable | 1 | 3 | 0 | ||
| Cadmium, total [as Cd] | 2 | 2 | 0 | ||
| Nickel, total [as Ni] | 2 | 2 | 0 | ||
| Organics, total toxic [TTO] | 1 | 2 | 0 | ||
| Chromium, total [as Cr] | 2 | 0 | 0 | ||
| Titanium, total [as Ti] | 2 | 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
- 7Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| November 18, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
| November 18, 2025 | Management Practice Violations - Failure to Maintain Records | ST6 |
| November 18, 2025 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| October 31, 2024 | Reporting Violations - Failure to Notify | ST6 |
| October 31, 2024 | Permit Violations - Violation Specified in Comment | ST6 |
| October 31, 2024 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| October 31, 2024 | Monitoring Violations - Invalid/Unrepresentative Sample | 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
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, CTP001646.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 CTP001646 there.
Nearby on the register
- Discharge permits in Hamden
- Every permit record in Hamden, 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.