Clean Water Act discharge permit · NPDES CT0100641
NAUGATUCK, BOROUGH OF, Naugatuck, CT: NPDES CT0100641 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 34Pollutants under a numeric limit
- 11Pollutants with an effluent exceedance
NAUGATUCK, BOROUGH OF, held by NAUGATUCK WPCF, holds NPDES permit CT0100641, which discharges to Naugatuck River. EPA’s file records it issued August 1, 2001 and expiring August 6, 2006. 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 | NAUGATUCK, BOROUGH OF |
|---|---|
| Permittee as filed | NAUGATUCK WPCF |
| NPDES ID | CT0100641 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | August 1, 2001 |
| Expiration date | August 6, 2006 |
| Issuing agency | CT DEP |
| Address | Naugatuck, CT 06770 |
| Receiving water | NAUGATUCK RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Long Meadow Pond Brook-Naugatuck River (HUC 011000051205) |
| Other EPA IDs (FRS) | RCRA handler CTD010144749; ICIS-AIR source CT0000000900903011 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 52Pollutants on file
- 34Under a numeric limit
- 43With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 3 | 19 | 13 | May 31, 2025 | 1,300% over the limit |
| Chlorine, total residual | 1 | 14 | 10 | May 31, 2011 | 467% over the limit |
| Zinc, total [as Zn] | 2 | 13 | 9 | April 30, 2021 | 163% over the limit |
| Oxygen, dissolved [DO] | 1 | 10 | 9 | September 30, 2010 | 36% over the limit |
| E. coli | 0 | 6 | 6 | May 31, 2025 | 1,395% over the limit |
| Coliform, fecal general | 2 | 6 | 4 | August 31, 2011 | 99,999% over the limit |
| Solids, suspended percent removal | 1 | 5 | 3 | May 31, 2025 | 133% over the limit |
| Nitrogen, ammonia total [as N] | 10 | 6 | 2 | August 31, 2020 | 250% over the limit |
| Copper, total [as Cu] | 2 | 6 | 2 | March 31, 2011 | 553% over the limit |
| BOD, carbonaceous [5 day, 5 C] | 5 | 7 | 1 | August 31, 2005 | 4% over the limit |
| pH | 2 | 5 | 1 | February 28, 2018 | |
| Nitrogen, nitrite total [as N] | 1 | 3 | 0 | ||
| Nitrogen, nitrate total [as N] | 1 | 3 | 0 | ||
| Phosphorus, total [as P] | 1 | 3 | 0 | ||
| Cadmium, total [as Cd] | 1 | 3 | 0 | ||
| Silver, total [as Ag] | 1 | 3 | 0 | ||
| Phosphorus, Total [Avg Seasonal Load Cap] | 0 | 3 | 0 | ||
| Nitrogen, total [as N] | 2 | 2 | 0 | ||
| Arsenic, total [as As] | 1 | 2 | 0 | ||
| Beryllium, total [as Be] | 1 | 2 | 0 | ||
| Carbonaceous oxygen demand, % removal | 1 | 2 | 0 | ||
| BOD, 5-day, 20 deg. C | 0 | 2 | 0 | ||
| Cyanide, total [as CN] | 0 | 2 | 0 | ||
| Cyanide, free [amenable to chlorination] | 0 | 2 | 0 | ||
| Chromium, hexavalent [as Cr] | 0 | 2 | 0 | ||
| Chromium, total [as Cr] | 0 | 2 | 0 | ||
| Iron, total [as Fe] | 0 | 2 | 0 | ||
| Lead, total [as Pb] | 0 | 2 | 0 | ||
| Thallium, total [as Tl] | 0 | 2 | 0 | ||
| Nickel, total [as Ni] | 0 | 2 | 0 | ||
| Antimony, total [as Sb] | 0 | 2 | 0 | ||
| Aluminum, total [as Al] | 0 | 2 | 0 | ||
| Selenium, total [as Se] | 0 | 2 | 0 | ||
| Phenols | 0 | 2 | 0 | ||
| Mercury, total [as Hg] | 0 | 2 | 0 | ||
| NOAEL Static 48Hr Acute D. pulex | 0 | 2 | 0 | ||
| NOAEL Static 48Hr Acute Pimephales promelas | 0 | 2 | 0 | ||
| Temperature, water deg. fahrenheit | 1 | 1 | 0 | ||
| Alkalinity, total [as CaCO3] | 1 | 1 | 0 | ||
| Solids, settleable | 1 | 1 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 1 | 0 | ||
| Flow, in conduit or thru treatment plant | 1 | 1 | 0 | ||
| Phosphorous, in total orthophosphate | 1 | 1 | 0 | ||
| Pass/Fail Static 48Hr Acute D. Pulex | 2 | 0 | 0 | ||
| LC50 Static 48Hr Acute Pimephales promelas | 2 | 0 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 1 | 0 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 1 | 0 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 1 | 0 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 1 | 0 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 1 | 0 | 0 | ||
| Copper, sludge, total, dry weight [as Cu] | 1 | 0 | 0 | ||
| Cadmium, sludge, total, dry weight [as Cd] | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES CT0100641.
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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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 CT0100641 there.
Nearby on the register
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- Every permit record in Connecticut, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.