Clean Water Act discharge permit · NPDES RI0100374
SOUTH KINGSTOWN REGIONAL WWTP, Narragansett, RI: NPDES RI0100374 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 25Pollutants under a numeric limit
- 11Pollutants with an effluent exceedance
SOUTH KINGSTOWN REGIONAL WWTP, held by TOWN OF SOUTH KINGSTOWN, holds NPDES permit RI0100374, which discharges to Rhode Island Sound. EPA’s file records it issued July 10, 2017 and expiring August 31, 2022. 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 | SOUTH KINGSTOWN REGIONAL WWTP |
|---|---|
| Permittee as filed | TOWN OF SOUTH KINGSTOWN |
| NPDES ID | RI0100374 |
| 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 | July 10, 2017 |
| Expiration date | August 31, 2022 |
| Address | Narragansett, RI 02882 |
| Receiving water | RHODE ISLAND SOUND |
| Program components on file | POTW, Pretreatment |
| NAICS | 221320 – Sewage Treatment Facilities |
| 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
- 25Pollutants on file
- 25Under 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 10 | 22 | 22 | December 31, 2025 | 638% over the limit |
| BOD, 5-day, 20 deg. C | 10 | 20 | 20 | May 31, 2026 | 338% over the limit |
| pH | 2 | 18 | 16 | December 31, 2024 | |
| Coliform, fecal general | 2 | 13 | 12 | December 31, 2008 | 5,999,900% over the limit |
| Enterococci | 2 | 12 | 12 | July 31, 2026 | 8,695,552% over the limit |
| LC50 Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | 1 | 6 | 3 | December 31, 2025 | 33% over the limit |
| Cyanide, total [as CN] | 2 | 5 | 3 | September 30, 2000 | 211% over the limit |
| BOD, 5-day, percent removal | 1 | 3 | 3 | May 31, 2026 | 17% over the limit |
| Solids, settleable | 2 | 4 | 2 | February 28, 2001 | 700% over the limit |
| Chlorine, total residual | 2 | 3 | 1 | December 31, 1997 | 15% over the limit |
| Flow, in conduit or thru treatment plant | 1 | 2 | 1 | March 31, 2026 | 3% over the limit |
| Copper, total [as Cu] | 2 | 2 | 0 | ||
| Aluminum, total [as Al] | 2 | 2 | 0 | ||
| Cyanide, free available | 2 | 2 | 0 | ||
| Lead, total [as Pb] | 2 | 1 | 0 | ||
| Cadmium, total [as Cd] | 2 | 0 | 0 | ||
| Chromium, total [as Cr] | 2 | 0 | 0 | ||
| Nickel, total [as Ni] | 2 | 0 | 0 | ||
| Zinc, total [as Zn] | 2 | 0 | 0 | ||
| Oil & Grease | 1 | 0 | 0 | ||
| Nitrogen, total [as N] | 1 | 0 | 0 | ||
| Nitrogen, nitrite total [as N] | 1 | 0 | 0 | ||
| Nitrogen, nitrate total [as N] | 1 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 0 | 0 | ||
| Solids, suspended percent removal | 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 |
|---|---|---|
| May 16, 2024 | Wet-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment | 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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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 RI0100374 there.
Nearby on the register
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- Every permit record in Narragansett, A to Z
- Discharge permits in Rhode Island
- Every permit record in Rhode Island, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.