Clean Water Act discharge permit · NPDES CT0101290
STONINGTON PAWCATUCK WPCF, Pawcatuck, CT: NPDES CT0101290 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 49Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
STONINGTON PAWCATUCK WPCF, held by STONINGTON-PAWCATUCK WPCF, holds NPDES permit CT0101290, which discharges to Pawcatuck River. EPA’s file records it issued May 7, 2014 and expiring May 31, 2019. 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 | STONINGTON PAWCATUCK WPCF |
|---|---|
| Permittee as filed | STONINGTON-PAWCATUCK WPCF |
| NPDES ID | CT0101290 |
| 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 | May 7, 2014 |
| Expiration date | May 31, 2019 |
| Issuing agency | CT DEP |
| Address | Pawcatuck, CT 06379 |
| Receiving water | PAWCATUCK RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Lower Pawcatuck River (HUC 010900050303) |
| Other EPA IDs (FRS) | ICIS-AIR source CT0000000901105050 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 50Pollutants on file
- 49Under a numeric limit
- 13With a violation of any kind
- 7With 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 | 2 | 7 | 5 | May 31, 2010 | 100% over the limit |
| Enterococci | 2 | 4 | 4 | April 30, 2021 | 99,999% over the limit |
| Solids, total suspended | 5 | 3 | 3 | April 30, 2010 | 913% over the limit |
| Coliform, fecal general | 4 | 3 | 3 | April 30, 2021 | 99,999% over the limit |
| pH | 2 | 3 | 3 | March 31, 2012 | |
| Solids, suspended percent removal | 1 | 3 | 3 | May 31, 2011 | 380% over the limit |
| Carbonaceous oxygen demand, % removal | 1 | 2 | 2 | April 30, 2010 | 460% over the limit |
| Flow, in conduit or thru treatment plant | 0 | 5 | 0 | ||
| Phosphorus, total [as P] | 3 | 2 | 0 | ||
| Flow rate | 2 | 1 | 0 | ||
| Arsenic, total [as As] | 2 | 1 | 0 | ||
| Nickel, total [as Ni] | 2 | 1 | 0 | ||
| Ultraviolet light dosage | 1 | 1 | 0 | ||
| BOD, carbonaceous [5 day, 5 C] | 3 | 0 | 0 | ||
| BOD, 5-day, 20 deg. C | 2 | 0 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 0 | 0 | ||
| Nitrogen, nitrite total [as N] | 2 | 0 | 0 | ||
| Nitrogen, nitrate total [as N] | 2 | 0 | 0 | ||
| Cyanide, total [as CN] | 2 | 0 | 0 | ||
| Cyanide, free [amenable to chlorination] | 2 | 0 | 0 | ||
| Beryllium, total [as Be] | 2 | 0 | 0 | ||
| Cadmium, total [as Cd] | 2 | 0 | 0 | ||
| Chromium, hexavalent [as Cr] | 2 | 0 | 0 | ||
| Chromium, total [as Cr] | 2 | 0 | 0 | ||
| Copper, total [as Cu] | 2 | 0 | 0 | ||
| Iron, total [as Fe] | 2 | 0 | 0 | ||
| Lead, total [as Pb] | 2 | 0 | 0 | ||
| Thallium, total [as Tl] | 2 | 0 | 0 | ||
| Silver, total [as Ag] | 2 | 0 | 0 | ||
| Zinc, total [as Zn] | 2 | 0 | 0 | ||
| Antimony, total [as Sb] | 2 | 0 | 0 | ||
| Aluminum, total [as Al] | 2 | 0 | 0 | ||
| Selenium, total [as Se] | 2 | 0 | 0 | ||
| Phenols | 2 | 0 | 0 | ||
| Mercury, total [as Hg] | 2 | 0 | 0 | ||
| NOAEL Static 48Hr Acute D. pulex | 2 | 0 | 0 | ||
| NOAEL Static 48Hr Acute Pimephales promelas | 2 | 0 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 0 | 0 | ||
| Arsenic, sludge tot. dry wt [as As] | 1 | 0 | 0 | ||
| Beryllium, sludge, tot. dry wt [as Be] | 1 | 0 | 0 | ||
| Solids, total, percent | 1 | 0 | 0 | ||
| Solids, fixed, % of total solids | 1 | 0 | 0 | ||
| Solids, volatile % of total solids | 1 | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| August 2, 2022 | Monitoring Violations - Frequency of Sampling Violation | 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
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Start the watch
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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 CT0101290 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.