Clean Water Act discharge permit · NPDES CT0100714
SHELTON, CITY OF, Shelton, CT: NPDES CT0100714 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 48Pollutants under a numeric limit
- 10Pollutants with an effluent exceedance
SHELTON, CITY OF holds NPDES permit CT0100714, which discharges to Housatonic River. EPA’s file records it issued September 4, 2015 and expiring September 30, 2020. 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 | SHELTON, CITY OF |
|---|---|
| Permittee as filed | SHELTON, CITY OF |
| NPDES ID | CT0100714 |
| 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 4, 2015 |
| Expiration date | September 30, 2020 |
| Issuing agency | CT DEP |
| Address | Shelton, CT 06484 |
| Receiving water | HOUSATONIC RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Halfway River-Housatonic River (HUC 011000051003) |
| Program components on file | Biosolids, POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | ICIS-AIR source CT0000000900100999 |
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
- 50Pollutants on file
- 48Under a numeric limit
- 50With a violation of any kind
- 10With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 5 | 32 | 22 | January 31, 2025 | 573% over the limit |
| Flow, in conduit or thru treatment plant | 0 | 20 | 20 | April 30, 2010 | 71% over the limit |
| BOD, 5-day, percent removal | 1 | 22 | 19 | April 30, 2026 | 387% over the limit |
| Solids, total suspended | 5 | 26 | 16 | April 30, 2024 | 297% over the limit |
| Solids, suspended percent removal | 1 | 18 | 15 | July 31, 2026 | 487% over the limit |
| Chlorine, total residual | 4 | 37 | 8 | September 30, 2023 | 100% over the limit |
| Enterococci | 2 | 8 | 8 | July 31, 2026 | 627% over the limit |
| pH | 2 | 9 | 3 | June 30, 2025 | |
| Coliform, fecal general | 3 | 1 | 1 | June 30, 2024 | 9% over the limit |
| Coliform, fecal - % samples exceeding limit | 1 | 1 | 1 | May 31, 2026 | 60% over the limit |
| Flow rate | 2 | 8 | 0 | ||
| BOD, carbonaceous [5 day, 5 C] | 0 | 8 | 0 | ||
| Phosphorus, total [as P] | 2 | 5 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 1 | 0 | ||
| Nitrogen, nitrite total [as N] | 2 | 1 | 0 | ||
| Nitrogen, nitrate total [as N] | 2 | 1 | 0 | ||
| Cyanide, total [as CN] | 2 | 1 | 0 | ||
| Cyanide, free [amenable to chlorination] | 2 | 1 | 0 | ||
| Arsenic, total [as As] | 2 | 1 | 0 | ||
| Beryllium, total [as Be] | 2 | 1 | 0 | ||
| Cadmium, total [as Cd] | 2 | 1 | 0 | ||
| Chromium, hexavalent [as Cr] | 2 | 1 | 0 | ||
| Chromium, total [as Cr] | 2 | 1 | 0 | ||
| Copper, total [as Cu] | 2 | 1 | 0 | ||
| Iron, total [as Fe] | 2 | 1 | 0 | ||
| Lead, total [as Pb] | 2 | 1 | 0 | ||
| Thallium, total [as Tl] | 2 | 1 | 0 | ||
| Nickel, total [as Ni] | 2 | 1 | 0 | ||
| Silver, total [as Ag] | 2 | 1 | 0 | ||
| Zinc, total [as Zn] | 2 | 1 | 0 | ||
| Antimony, total [as Sb] | 2 | 1 | 0 | ||
| Aluminum, total [as Al] | 2 | 1 | 0 | ||
| Selenium, total [as Se] | 2 | 1 | 0 | ||
| Phenols | 2 | 1 | 0 | ||
| Mercury, total [as Hg] | 2 | 1 | 0 | ||
| NOAEL Static 48Hr Acute D. pulex | 2 | 1 | 0 | ||
| NOAEL Static 48Hr Acute Pimephales promelas | 2 | 1 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 1 | 0 | ||
| Arsenic, sludge tot. dry wt [as As] | 1 | 1 | 0 | ||
| Beryllium, sludge, tot. dry wt [as Be] | 1 | 1 | 0 | ||
| Solids, total, percent | 1 | 1 | 0 | ||
| Solids, fixed, % of total solids | 1 | 1 | 0 | ||
| Solids, volatile % of total solids | 1 | 1 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 1 | 1 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 1 | 1 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 1 | 1 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 1 | 1 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 1 | 1 | 0 | ||
| Copper, sludge, total, dry weight [as Cu] | 1 | 1 | 0 | ||
| Cadmium, sludge, total, dry weight [as Cd] | 1 | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| March 3, 2021 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| February 28, 2019 | Reporting Violations - Failure to Notify | 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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Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.