Clean Water Act discharge permit · NPDES CT0100781
THOMASTON WPCA, Thomaston, CT: NPDES CT0100781 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 29Pollutants under a numeric limit
- 11Pollutants with an effluent exceedance
THOMASTON WPCA, held by THOMASTON WPCF, holds NPDES permit CT0100781, which discharges to Naugatuck River. EPA’s file records it issued September 28, 2006 and expiring September 30, 2011. 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 | THOMASTON WPCA |
|---|---|
| Permittee as filed | THOMASTON WPCF |
| NPDES ID | CT0100781 |
| 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 | September 28, 2006 |
| Expiration date | September 30, 2011 |
| Issuing agency | CT DEP |
| Address | Thomaston, CT 06787 |
| Receiving water | NAUGATUCK RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Northfield Brook-Naugatuck River (HUC 011000051105) |
| Other EPA IDs (FRS) | RCRA handler CTD084380781 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 32Pollutants on file
- 29Under a numeric limit
- 15With 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 |
|---|---|---|---|---|---|
| Flow, in conduit or thru treatment plant | 2 | 26 | 26 | May 31, 2014 | 29% over the limit |
| Solids, total suspended | 3 | 18 | 18 | January 31, 2023 | 646% over the limit |
| Coliform, fecal general | 2 | 12 | 12 | August 31, 2005 | 99,999% over the limit |
| Solids, suspended percent removal | 1 | 10 | 10 | October 31, 2013 | 560% over the limit |
| BOD, 5-day, percent removal | 1 | 9 | 8 | October 31, 2013 | 560% over the limit |
| Chlorine, total residual | 0 | 7 | 7 | May 31, 2000 | 100% over the limit |
| BOD, 5-day, 20 deg. C | 3 | 5 | 5 | February 29, 2008 | 32% over the limit |
| pH | 2 | 5 | 4 | July 31, 2001 | |
| Nickel, total [as Ni] | 2 | 3 | 3 | February 28, 2018 | 121% over the limit |
| Lead, total [as Pb] | 2 | 2 | 2 | March 31, 2018 | 10% over the limit |
| Ultraviolet light dosage | 1 | 2 | 2 | May 31, 2011 | 100% over the limit |
| Nitrogen, ammonia total [as N] | 5 | 1 | 0 | ||
| Beryllium, sludge, tot. dry wt [as Be] | 1 | 1 | 0 | ||
| Mercury, total [as Hg] | 0 | 1 | 0 | ||
| Pass/Fail Static 48Hr Acute D. Pulex | 0 | 1 | 0 | ||
| Copper, total [as Cu] | 2 | 0 | 0 | ||
| Zinc, total [as Zn] | 2 | 0 | 0 | ||
| LC50 Static 48Hr Acute D. Pulex | 2 | 0 | 0 | ||
| LC50 Static 48Hr Acute Pimephales promelas | 2 | 0 | 0 | ||
| Nitrogen, total [as N] | 1 | 0 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 0 | 0 | ||
| Arsenic, sludge tot. dry wt [as As] | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES CT0100781.
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 CT0100781 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.