Clean Water Act discharge permit · NPDES RI0100056
WARREN WWTF, Warren, RI: NPDES RI0100056 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 24Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
WARREN WWTF, held by TOWN OF WARREN, holds NPDES permit RI0100056, which discharges to Warren River. EPA’s file records it issued September 30, 2010 and expiring November 30, 2015. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | WARREN WWTF |
|---|---|
| Permittee as filed | TOWN OF WARREN |
| NPDES ID | RI0100056 |
| 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, 2010 |
| Expiration date | November 30, 2015 |
| Address | Warren, RI 02885 |
| Receiving water | WARREN RIVER |
| Subwatershed | Barrington River-Warren River (HUC 010900040702) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 60Pollutants on file
- 24Under a numeric limit
- 60With a violation of any kind
- 9With 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 |
|---|---|---|---|---|---|
| Flow, in conduit or thru treatment plant | 8 | 32 | 26 | March 31, 2026 | 78% over the limit |
| Enterococci | 2 | 25 | 22 | September 30, 2019 | 9,795,880% over the limit |
| Coliform, fecal general | 2 | 23 | 12 | January 31, 2008 | 475% over the limit |
| Solids, total suspended | 20 | 39 | 9 | December 31, 2019 | 120% over the limit |
| Copper, total [as Cu] | 6 | 50 | 7 | August 31, 2022 | 99,999% over the limit |
| Chlorine, total residual | 6 | 15 | 7 | December 31, 2023 | 65% over the limit |
| pH | 2 | 14 | 6 | June 30, 2007 | |
| Solids, settleable | 2 | 14 | 6 | March 31, 2001 | 2,233% over the limit |
| LC50 Static Renewal 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | 1 | 5 | 2 | December 31, 2025 | 37% over the limit |
| BOD, 5-day, 20 deg. C | 20 | 126 | 0 | ||
| Cyanide, total [as CN] | 6 | 18 | 0 | ||
| Oil & Grease | 1 | 13 | 0 | ||
| Cadmium, total [as Cd] | 2 | 10 | 0 | ||
| Chromium, total [as Cr] | 2 | 10 | 0 | ||
| Lead, total [as Pb] | 2 | 10 | 0 | ||
| Nickel, total [as Ni] | 2 | 10 | 0 | ||
| Zinc, total [as Zn] | 2 | 10 | 0 | ||
| Aluminum, total [as Al] | 2 | 10 | 0 | ||
| Nitrogen, nitrate total [as N] | 4 | 5 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 4 | 5 | 0 | ||
| Nitrogen, total [as N] | 12 | 4 | 0 | ||
| Nitrogen, nitrite total [as N] | 4 | 4 | 0 | ||
| BOD, 5-day, percent removal | 1 | 4 | 0 | ||
| Solids, suspended percent removal | 1 | 4 | 0 | ||
| Nitrite plus nitrate dissolved 1 det. | 0 | 2 | 0 | ||
| Nitrogen, ammonia total [as N] | 0 | 1 | 0 | ||
| Perfluorooctanesulfonamide (PFOSA) | 0 | 1 | 0 | ||
| Perfluorohexanoic acid (PFHxA) | 0 | 1 | 0 | ||
| Perfluorononanoic acid (PFNA) | 0 | 1 | 0 | ||
| Perfluorodecanoic acid (PFDA) | 0 | 1 | 0 | ||
| Perfluoroundecanoic acid (PFUnA) | 0 | 1 | 0 | ||
| Perfluorododecanoic acid (PFDoA) | 0 | 1 | 0 | ||
| Perfluorotridecanoic acid (PFTrDA) | 0 | 1 | 0 | ||
| Perfluorotetradecanoic acid (PFTeDA) | 0 | 1 | 0 | ||
| N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE) | 0 | 1 | 0 | ||
| N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE) | 0 | 1 | 0 | ||
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | 0 | 1 | 0 | ||
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | 0 | 1 | 0 | ||
| Perfluorodecanesulfonic acid (PFDS) | 0 | 1 | 0 | ||
| Perfluoroheptanesulfonic acid (PFHpS) | 0 | 1 | 0 | ||
| Perfluorooctanesulfonic acid (PFOS) | 0 | 1 | 0 | ||
| 1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) | 0 | 1 | 0 | ||
| 1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) | 0 | 1 | 0 | ||
| 1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS) | 0 | 1 | 0 | ||
| Perfluoropentanesulfonic acid (PFPeS) | 0 | 1 | 0 | ||
| Perfluorononanesulfonic acid (PFNS) | 0 | 1 | 0 | ||
| Hexafluoropropylene oxide dimer acid (HFPO-DA) | 0 | 1 | 0 | ||
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | 0 | 1 | 0 | ||
| Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) | 0 | 1 | 0 | ||
| Perfluorododecanesulfonic acid (PFDoS) | 0 | 1 | 0 | ||
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | 0 | 1 | 0 | ||
| N-methyl perfluorooctanesulfonamide (NMeFOSA) | 0 | 1 | 0 | ||
| N-ethyl perfluorooctanesulfonamide (NEtFOSA) | 0 | 1 | 0 | ||
| 3-Perfluoropropyl propanoic acid (3:3 FTCA) | 0 | 1 | 0 | ||
| Perfluoro-3-methoxypropanoic acid (PFMPA) | 0 | 1 | 0 | ||
| 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS) | 0 | 1 | 0 | ||
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | 0 | 1 | 0 | ||
| 3-Perfluoroheptyl propanoic acid (7:3 FTCA) | 0 | 1 | 0 | ||
| Perfluoro-4-methoxybutanoic acid (PFMBA) | 0 | 1 | 0 | ||
| 2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA) | 0 | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| May 8, 2025 | Dry-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.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.