Clean Water Act discharge permit · NPDES RI0100153
WEST WARWICK WASTEWATER TREATMENT FACILITY, West Warwick, RI: NPDES RI0100153 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 29Pollutants under a numeric limit
- 18Pollutants with an effluent exceedance
WEST WARWICK WASTEWATER TREATMENT FACILITY, held by WEST WARWICK TOWN HALL, holds NPDES permit RI0100153, which discharges to Pawtuxet River. EPA’s file records it issued September 30, 2008 and expiring November 30, 2013. 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 | WEST WARWICK WASTEWATER TREATMENT FACILITY |
|---|---|
| Permittee as filed | WEST WARWICK TOWN HALL |
| NPDES ID | RI0100153 |
| 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 30, 2008 |
| Expiration date | November 30, 2013 |
| Address | West Warwick, RI 02893 |
| Receiving water | PAWTUXET RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | North Branch Pawtuxet River (HUC 010900040607) |
| Program components on file | POTW, Pretreatment |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | ICIS-AIR source RI0004400302563 |
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
- 33Pollutants on file
- 29Under a numeric limit
- 27With a violation of any kind
- 18With 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 | 44 | 44 | March 31, 2018 | 5,999,900% over the limit |
| Nitrogen, ammonia total [as N] | 9 | 36 | 35 | July 31, 2026 | 1,450% over the limit |
| Chlorine, total residual | 0 | 33 | 33 | July 31, 2004 | 27,400% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 20 | 38 | 26 | July 31, 2020 | 380% over the limit |
| pH | 2 | 19 | 18 | February 28, 2026 | |
| Nitrogen, total [as N] | 6 | 16 | 16 | July 31, 2025 | 323% over the limit |
| Solids, total suspended | 30 | 14 | 14 | October 31, 2017 | 160% over the limit |
| NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia | 1 | 15 | 11 | December 31, 2025 | 88% over the limit |
| Phosphorus, total [as P] | 16 | 13 | 11 | April 30, 2020 | 700% over the limit |
| BOD, 5-day, 20 deg. C | 10 | 11 | 11 | May 31, 2010 | 96% over the limit |
| Enterococci | 0 | 11 | 9 | June 30, 2026 | 2,300% over the limit |
| Oxygen, dissolved [DO] | 1 | 10 | 9 | July 31, 2016 | 100% over the limit |
| Cyanide, total [as CN] | 4 | 8 | 8 | September 30, 2010 | 150% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 6 | 6 | March 31, 2010 | 15% over the limit |
| Solids, suspended percent removal | 1 | 5 | 5 | May 31, 2010 | 67% over the limit |
| BOD, 5-day, percent removal | 1 | 4 | 4 | May 31, 2010 | 67% over the limit |
| LC50 Static 48Hr Acute Pimephales promelas | 1 | 7 | 3 | December 31, 2009 | 53% over the limit |
| Aluminum, total [as Al] | 0 | 11 | 1 | June 30, 2024 | 9% over the limit |
| Copper, total [as Cu] | 4 | 20 | 0 | ||
| Zinc, total [as Zn] | 4 | 20 | 0 | ||
| LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia | 1 | 4 | 0 | ||
| Ultraviolet light dosage | 3 | 3 | 0 | ||
| Ultraviolet light intensity | 3 | 2 | 0 | ||
| Phosphate, ortho [as P] | 2 | 2 | 0 | ||
| Phosphorus, ortho | 0 | 2 | 0 | ||
| Ultraviolet light transmittance | 3 | 1 | 0 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 1 | 1 | 0 | ||
| Nitrogen, nitrite total [as N] | 4 | 0 | 0 | ||
| Nitrogen, nitrate total [as N] | 4 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 4 | 0 | 0 | ||
| Cadmium, total [as Cd] | 4 | 0 | 0 | ||
| Lead, total [as Pb] | 4 | 0 | 0 | ||
| Solids, settleable | 2 | 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
- 6Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 10, 2026 | Dry-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment | ST6 |
| March 19, 2026 | PR: Failure to submit noncompliance report - CSO, SSO, or Bypass [40 CFR 122.41(l)(6) & (m)(3)(ii)] | ST6 |
| March 13, 2026 | Dry-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment | ST6 |
| May 8, 2025 | PR: Failure to submit noncompliance report - CSO, SSO, or Bypass [40 CFR 122.41(l)(6) & (m)(3)(ii)] | ST6 |
| May 2, 2025 | Dry-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment | ST6 |
| July 29, 2024 | Biosolids: Other Management Practice Violation | 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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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 RI0100153 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.