Clean Water Act discharge permit · NPDES CT0101681
LEDYARD WPC AUTHORITY, Ledyard, CT: NPDES CT0101681 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 25Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
LEDYARD WPC AUTHORITY, held by LEDYARD WATER POLLUTION, holds NPDES permit CT0101681, which discharges to Mystic River/Seth Williams Brook. EPA’s file records it issued September 23, 2014 and expiring September 30, 2019. 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 | LEDYARD WPC AUTHORITY |
|---|---|
| Permittee as filed | LEDYARD WATER POLLUTION |
| NPDES ID | CT0101681 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | September 23, 2014 |
| Expiration date | September 30, 2019 |
| Issuing agency | CT DEP |
| Address | Ledyard, CT 06339 |
| Receiving water | MYSTIC RIVER/SETH WILLIAMS BROOK |
| Subwatershed | Mystic River-Frontal Fishers Island Sound (HUC 011000030301) |
| 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
- 35Pollutants on file
- 25Under a numeric limit
- 21With a violation of any kind
- 8With 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 |
|---|---|---|---|---|---|
| Nitrogen, total [as N] | 1 | 11 | 8 | October 31, 2017 | 89% over the limit |
| pH | 2 | 12 | 7 | January 31, 2000 | |
| E. coli | 2 | 8 | 6 | August 31, 2016 | 99,999% over the limit |
| BOD, 5-day, 20 deg. C | 3 | 7 | 4 | January 31, 2026 | 113% over the limit |
| Nitrogen, ammonia total [as N] | 2 | 5 | 4 | August 31, 1999 | 614% over the limit |
| Solids, total suspended | 3 | 6 | 2 | January 31, 2026 | 173% over the limit |
| BOD, 5-day, percent removal | 1 | 4 | 2 | July 31, 2017 | 30% over the limit |
| Solids, suspended percent removal | 1 | 3 | 1 | January 31, 2026 | 110% over the limit |
| Copper, total [as Cu] | 0 | 4 | 0 | ||
| Flow rate | 2 | 2 | 0 | ||
| Temperature, water deg. fahrenheit | 0 | 2 | 0 | ||
| Solids, settleable | 0 | 2 | 0 | ||
| Nitrogen, nitrite total [as N] | 0 | 2 | 0 | ||
| Nitrogen, nitrate total [as N] | 0 | 2 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 0 | 2 | 0 | ||
| Chlorine, total residual | 0 | 2 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 2 | 1 | 0 | ||
| Ultraviolet light intensity | 1 | 1 | 0 | ||
| Oxygen, dissolved [DO] | 0 | 1 | 0 | ||
| Phosphorus, total [as P] | 0 | 1 | 0 | ||
| Phosphorous, in total orthophosphate | 0 | 1 | 0 | ||
| NOAEL Static 48Hr Acute D. pulex | 2 | 0 | 0 | ||
| NOAEL Static 48Hr Acute Pimephales promelas | 2 | 0 | 0 | ||
| Arsenic, total [as As] | 1 | 0 | 0 | ||
| Beryllium, total [as Be] | 1 | 0 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 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 | ||
| 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 | ||
| Solids, sludge, total, dry weight | 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 CT0101681.
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 CT0101681 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 October 14, 2026.