Clean Water Act discharge permit · NPDES CT0100013
ANSONIA WPCA, CITY OF, Ansonia, CT: NPDES CT0100013 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 25Pollutants under a numeric limit
- 11Pollutants with an effluent exceedance
ANSONIA WPCA, CITY OF holds NPDES permit CT0100013, which discharges to Naugatuck River. EPA’s file records it issued December 17, 2012 and expiring December 31, 2017. 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 | ANSONIA WPCA, CITY OF |
|---|---|
| Permittee as filed | ANSONIA WPCA, CITY OF |
| NPDES ID | CT0100013 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | December 17, 2012 |
| Expiration date | December 31, 2017 |
| Issuing agency | CT DEP |
| Address | Ansonia, CT 06401 |
| Receiving water | NAUGATUCK RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Bladens River-Naugatuck River (HUC 011000051207) |
| Program components on file | Biosolids, POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 28Pollutants on file
- 25Under a numeric limit
- 27With 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 |
|---|---|---|---|---|---|
| Chlorine, total residual | 0 | 20 | 20 | July 31, 2009 | 100% over the limit |
| Solids, suspended percent removal | 1 | 12 | 10 | December 31, 2023 | 120% over the limit |
| Flow, in conduit or thru treatment plant | 0 | 8 | 8 | March 31, 2011 | 31% over the limit |
| Phosphorus, total [as P] | 3 | 9 | 7 | August 31, 2024 | 441% over the limit |
| BOD, 5-day, percent removal | 1 | 9 | 7 | March 31, 2024 | 193% over the limit |
| Coliform, fecal general | 2 | 6 | 6 | June 30, 2008 | 99,999% over the limit |
| Phosphorus, Total [Avg Seasonal Load Cap] | 1 | 6 | 5 | October 31, 2023 | 18% over the limit |
| NOAEL Static 48Hr Acute Pimephales promelas | 2 | 5 | 3 | January 31, 2024 | 100% over the limit |
| BOD, 5-day, 20 deg. C | 3 | 8 | 2 | March 31, 2024 | 20% over the limit |
| Copper, total [as Cu] | 0 | 2 | 2 | May 31, 2012 | 7,406% over the limit |
| NOAEL Static 48Hr Acute D. pulex | 2 | 2 | 1 | January 31, 2024 | 90% over the limit |
| Nickel, sludge, total, dry weight [as Ni] | 1 | 9 | 0 | ||
| Solids, total suspended | 3 | 6 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 6 | 0 | ||
| Arsenic, sludge tot. dry wt [as As] | 1 | 6 | 0 | ||
| Beryllium, sludge, tot. dry wt [as Be] | 1 | 6 | 0 | ||
| Solids, total, percent | 1 | 6 | 0 | ||
| Solids, fixed, % of total solids | 1 | 6 | 0 | ||
| Solids, volatile % of total solids | 1 | 6 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 1 | 6 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 1 | 6 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 1 | 6 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 1 | 6 | 0 | ||
| Copper, sludge, total, dry weight [as Cu] | 1 | 6 | 0 | ||
| Cadmium, sludge, total, dry weight [as Cd] | 1 | 6 | 0 | ||
| Flow | 2 | 4 | 0 | ||
| Ultraviolet light dosage | 1 | 2 | 0 | ||
| E. coli | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES CT0100013.
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
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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 CT0100013 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.