Clean Water Act discharge permit · NPDES CT0100625
WATERBURY WPCF, Waterbury, CT: NPDES CT0100625 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 29Pollutants under a numeric limit
- 17Pollutants with an effluent exceedance
WATERBURY WPCF holds NPDES permit CT0100625, which discharges to Naugatuck River. EPA’s file records it issued November 19, 2013 and expiring November 30, 2018. 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 | WATERBURY WPCF |
|---|---|
| Permittee as filed | WATERBURY WPCF |
| NPDES ID | CT0100625 |
| 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 | November 19, 2013 |
| Expiration date | November 30, 2018 |
| Issuing agency | CT DEP |
| Address | Waterbury, CT 06708 |
| Receiving water | NAUGATUCK RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Long Meadow Pond Brook-Naugatuck River (HUC 011000051205) |
| Program components on file | Biosolids, CSO, POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | RCRA handler CTR000504613; ICIS-AIR source CT0000000900909036 |
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
- 54Pollutants on file
- 29Under a numeric limit
- 54With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 3 | 59 | 49 | August 31, 2024 | 1,620% over the limit |
| Nickel, total [as Ni] | 6 | 45 | 36 | July 31, 2026 | 285% over the limit |
| Nitrogen, ammonia total [as N] | 3 | 28 | 27 | October 31, 2020 | 333% over the limit |
| Flow, in conduit or thru treatment plant | 0 | 25 | 23 | June 30, 2013 | 36% over the limit |
| Solids, suspended percent removal | 1 | 20 | 15 | October 31, 2017 | 353% over the limit |
| pH | 2 | 19 | 15 | June 30, 2024 | |
| Zinc, total [as Zn] | 6 | 23 | 14 | March 31, 2026 | 224% over the limit |
| Coliform, fecal general | 2 | 20 | 13 | May 31, 2009 | 24,900% over the limit |
| Ultraviolet light dosage | 0 | 13 | 13 | July 31, 2026 | 100% over the limit |
| Aluminum, total [as Al] | 0 | 16 | 12 | August 31, 2024 | 2,066% over the limit |
| Oxygen, dissolved [DO] | 1 | 14 | 11 | November 30, 2003 | 46% over the limit |
| BOD, 5-day, 20 deg. C | 5 | 18 | 9 | August 31, 2024 | 376% over the limit |
| BOD, 5-day, percent removal | 1 | 12 | 8 | March 31, 2018 | 147% over the limit |
| Flow rate | 1 | 7 | 7 | January 31, 2019 | 18% over the limit |
| E. coli | 2 | 4 | 4 | August 31, 2024 | 168% over the limit |
| Copper, total [as Cu] | 6 | 10 | 3 | December 31, 2014 | 154% over the limit |
| Phosphorus, total [as P] | 2 | 2 | 1 | April 30, 2021 | 8% over the limit |
| Lead, total [as Pb] | 0 | 7 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 1 | 5 | 0 | ||
| Cyanide, total [as CN] | 0 | 5 | 0 | ||
| Cadmium, sludge, total, dry weight [as Cd] | 1 | 4 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 3 | 0 | ||
| Solids, fixed, % of total solids | 1 | 3 | 0 | ||
| Solids, volatile % of total solids | 1 | 3 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 1 | 3 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 1 | 3 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 1 | 3 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 1 | 3 | 0 | ||
| Copper, sludge, total, dry weight [as Cu] | 1 | 3 | 0 | ||
| Solids, sludge, total, dry weight | 1 | 3 | 0 | ||
| Arsenic, sludge tot. dry wt [as As] | 1 | 2 | 0 | ||
| Beryllium, sludge, tot. dry wt [as Be] | 1 | 2 | 0 | ||
| Solids, settleable | 0 | 2 | 0 | ||
| Nitrogen, total [as N] | 0 | 2 | 0 | ||
| Arsenic, total [as As] | 0 | 2 | 0 | ||
| Beryllium, total [as Be] | 0 | 2 | 0 | ||
| Pass/Fail Static 48Hr Acute D. Pulex | 0 | 2 | 0 | ||
| NOAEL Static 48Hr Acute D. pulex | 2 | 1 | 0 | ||
| NOAEL Static 48Hr Acute Pimephales promelas | 2 | 1 | 0 | ||
| Nitrogen, nitrite total [as N] | 0 | 1 | 0 | ||
| Nitrogen, nitrate total [as N] | 0 | 1 | 0 | ||
| Cyanide, free [amenable to chlorination] | 0 | 1 | 0 | ||
| Cadmium, total [as Cd] | 0 | 1 | 0 | ||
| Chromium, hexavalent [as Cr] | 0 | 1 | 0 | ||
| Chromium, total [as Cr] | 0 | 1 | 0 | ||
| Iron, total [as Fe] | 0 | 1 | 0 | ||
| Thallium, total [as Tl] | 0 | 1 | 0 | ||
| Silver, total [as Ag] | 0 | 1 | 0 | ||
| Antimony, total [as Sb] | 0 | 1 | 0 | ||
| Selenium, total [as Se] | 0 | 1 | 0 | ||
| Phenols | 0 | 1 | 0 | ||
| Chlorine, total residual | 0 | 1 | 0 | ||
| Mercury, total [as Hg] | 0 | 1 | 0 | ||
| Pass/Fail Static 96 Hr Acute Pimephales Promelas | 0 | 1 | 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 |
|---|---|---|
| May 7, 2024 | Management Practice Violations - No Licensed/Certified Operator | 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.