Clean Water Act discharge permit · NPDES CTP001123
MACDERMID ENTHONE, INC., West Haven, CT: NPDES CTP001123 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 21Pollutants under a numeric limit
- 11Pollutants with an effluent exceedance
MACDERMID ENTHONE, INC., held by ENTHONE-OMI (NO AMERICA) INC, holds NPDES permit CTP001123, which discharges to Long Island Sound/New Haven Harbor. EPA’s file records it issued August 28, 2008 and expiring August 31, 2013. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | MACDERMID ENTHONE, INC. |
|---|---|
| Permittee as filed | ENTHONE-OMI (NO AMERICA) INC |
| NPDES ID | CTP001123 |
| 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 28, 2008 |
| Expiration date | August 31, 2013 |
| Issuing agency | CT DEP |
| Address | West Haven, CT 06516 |
| Receiving water | LONG ISLAND SOUND/NEW HAVEN HARBOR |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 27Pollutants on file
- 21Under a numeric limit
- 26With a violation of any kind
- 11With 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 |
|---|---|---|---|---|---|
| pH, minimum | 0 | 35 | 33 | December 31, 2022 | |
| Nickel, total [as Ni] | 2 | 36 | 19 | March 31, 2024 | 1,650% over the limit |
| pH | 2 | 24 | 13 | November 30, 2022 | |
| Zinc, total [as Zn] | 2 | 27 | 12 | March 31, 2024 | 1,500% over the limit |
| Solids, total suspended | 2 | 21 | 9 | August 31, 2013 | 164% over the limit |
| Silver, total [as Ag] | 2 | 19 | 9 | July 31, 2018 | 380% over the limit |
| pH, maximum | 0 | 6 | 6 | February 28, 2022 | |
| Copper, total [as Cu] | 2 | 16 | 4 | March 31, 2014 | 45% over the limit |
| Fluoride, total [as F] | 2 | 16 | 3 | April 30, 2016 | 35% over the limit |
| Cyanide, total [as CN] | 2 | 14 | 2 | October 31, 2003 | 529% over the limit |
| Lead, total [as Pb] | 2 | 12 | 2 | April 30, 2014 | 130% over the limit |
| Iron, total [as Fe] | 2 | 18 | 0 | ||
| Cadmium, total [as Cd] | 2 | 12 | 0 | ||
| Chromium, hexavalent [as Cr] | 2 | 12 | 0 | ||
| Chromium, total [as Cr] | 2 | 12 | 0 | ||
| Tin, total [as Sn] | 2 | 10 | 0 | ||
| Flow | 1 | 8 | 0 | ||
| Organics, total toxic [TTO] | 1 | 7 | 0 | ||
| Organics, volatile [NJAC reg. 7:23-17e] | 1 | 7 | 0 | ||
| Cyanide, free [amenable to chlorination] | 2 | 6 | 0 | ||
| Selenium, total [as Se] | 2 | 6 | 0 | ||
| Flow rate | 0 | 6 | 0 | ||
| Oil petroleum, total recoverable | 0 | 6 | 0 | ||
| Phenols | 0 | 6 | 0 | ||
| Duration of discharge | 0 | 6 | 0 | ||
| Flow rate | 1 | 2 | 0 | ||
| Flow, maximum during 24 hr period | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| August 31, 2023 | Permit Violations - Discharge Without a Valid Permit | ST6 |
| August 31, 2023 | Permit Violations - Violation Specified in Comment | 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, CTP001123.
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 CTP001123 there.
Nearby on the register
- Discharge permits in West Haven
- Every permit record in West Haven, A to Z
- Discharge permits in Connecticut
- Every permit record in Connecticut, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.