Clean Water Act discharge permit · NPDES CT0100382
NEW LONDON WPCF, New London, CT: NPDES CT0100382 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 49Pollutants under a numeric limit
- 12Pollutants with an effluent exceedance
NEW LONDON WPCF, held by NEW LONDON STP, holds NPDES permit CT0100382, which discharges to Thames River. EPA’s file records it issued September 29, 2016 and expiring September 30, 2021. 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 | NEW LONDON WPCF |
|---|---|
| Permittee as filed | NEW LONDON STP |
| NPDES ID | CT0100382 |
| 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 29, 2016 |
| Expiration date | September 30, 2021 |
| Issuing agency | CT DEP |
| Address | New London, CT 06320 |
| Receiving water | THAMES RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Long Island Sound Deep (HUC 020302030000) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 51Pollutants on file
- 49Under a numeric limit
- 21With a violation of any kind
- 12With 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 |
|---|---|---|---|---|---|
| Coliform, fecal general | 3 | 25 | 24 | June 30, 2021 | 99,999% over the limit |
| Flow, in conduit or thru treatment plant | 0 | 19 | 19 | April 30, 2010 | 45% over the limit |
| Solids, total suspended | 5 | 17 | 17 | March 31, 2026 | 452% over the limit |
| Chlorine, total residual | 4 | 16 | 16 | October 31, 2005 | 55% over the limit |
| Solids, suspended percent removal | 1 | 11 | 11 | March 31, 2024 | 307% over the limit |
| BOD, 5-day, 20 deg. C | 5 | 10 | 10 | January 31, 2024 | 260% over the limit |
| pH | 2 | 11 | 9 | February 29, 2004 | |
| BOD, 5-day, percent removal | 1 | 4 | 4 | March 31, 2024 | 327% over the limit |
| NOAEL Static 48Hr Acute D. pulex | 2 | 3 | 2 | November 30, 2024 | 91% over the limit |
| Enterococci | 2 | 2 | 2 | July 31, 2021 | 297% over the limit |
| NOAEL Static 48Hr Acute Pimephales promelas | 2 | 2 | 1 | August 31, 2007 | 9% over the limit |
| Coliform, fecal - % samples exceeding limit | 1 | 1 | 1 | June 30, 2021 | 18% over the limit |
| Nitrogen, ammonia total [as N] | 3 | 2 | 0 | ||
| Phosphorus, total [as P] | 3 | 2 | 0 | ||
| Iron, total [as Fe] | 2 | 2 | 0 | ||
| Aluminum, total [as Al] | 2 | 2 | 0 | ||
| Cyanide, free [amenable to chlorination] | 2 | 1 | 0 | ||
| Beryllium, sludge, tot. dry wt [as Be] | 1 | 1 | 0 | ||
| Solids, total, percent | 1 | 1 | 0 | ||
| Solids, volatile % of total solids | 1 | 1 | 0 | ||
| Nitrogen, ammonia, sludge, tot dry wgt | 0 | 1 | 0 | ||
| Flow rate | 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 | ||
| Arsenic, total [as As] | 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 | ||
| Lead, total [as Pb] | 2 | 0 | 0 | ||
| Thallium, total [as Tl] | 2 | 0 | 0 | ||
| Nickel, total [as Ni] | 2 | 0 | 0 | ||
| Silver, total [as Ag] | 2 | 0 | 0 | ||
| Zinc, total [as Zn] | 2 | 0 | 0 | ||
| Antimony, total [as Sb] | 2 | 0 | 0 | ||
| Selenium, total [as Se] | 2 | 0 | 0 | ||
| Phenols | 2 | 0 | 0 | ||
| Mercury, total [as Hg] | 2 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 0 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 0 | 0 | ||
| Arsenic, sludge tot. dry wt [as As] | 1 | 0 | 0 | ||
| Solids, fixed, % 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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 10, 2024 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| April 10, 2024 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| April 10, 2024 | Reporting Violations - Failure to Notify | ST6 |
| December 31, 2019 | Monitoring Violations - Analysis not Conducted | ST6 |
Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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 September 15, 2026.