DirtyWaterWatch

Rhode Island / Dischargers /

West Warwick Regional Wastewater Treatment Facility

SSO · Rhode Island · West Warwick, Coventry, Warwick (part)

NPDES permit
RI0100153
Outfalls
none with coordinates yet
Receiving waters
Pawtuxet River
Tracked waters
Pawtuxet River, RI
Events tracked
3 discharges · latest Apr 10, 2026, 8:25 AM EDT
Volume reported
4,294,750 gallons across the 3 discharges that give a volume

Source: discharger record from the project's research and EPA ECHO (dischargers.json); counts from the 3 event records below, as of 2026-11-02 11:56 UTC.

How it tells the public

No public notification channel found. Operator must report SSOs/bypasses to RIDEM verbally (as soon as possible, within 24 h) and electronically via EPA NeT-SewerOverflow within 5 calendar days; those reports surface later in EPA ECHO detailed facility reports. Public hears only if DEM closes shellfish areas (hotline 401-222-2900, Constant Contact email list, dem.ri.gov/shellfish, sometimes a press release) or RIDOH/DEM issue a contact advisory.

Source: the project's research on each operator's notification channel (research/<state>/dischargers.json), checked by fetching the operator's pages.

Outfalls

Source: water outlines from OpenBoatLaunch and OpenStreetMap contributors (ODbL); outfalls from EPA ECHO and the state outfall layers; modeled reaches computed by DirtyWaterWatch from USGS NLDI, NHDPlus and the nearest USGS gauge (Jobson 1996); basemap OpenFreeMap and OpenMapTiles.

Event history

Events reported for West Warwick Regional Wastewater Treatment Facility, newest first
StartEnd Water OutfallTypeVolumeSourceLinks
Apr 10, 2026, 8:25 AM EDT Apr 10, 2026, 12:45 PM EDT Pawtuxet River, RI not stated Bypass 1.21 million gal EPA ECHO Sewer Overflow and Bypass Event report (reported to regulators) via ECHO NPDES Sewer Overflow and Bypass Event Dataset (eRule Phase 2, current versions), record RI0100153:2:1, reported Apr 14, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Apr 10, 2026 ended, time not reported Pawtuxet River, RI not stated Bypassrevised not reported EPA ECHO (reported to regulators) via ri-echo-dfr, record 3687463783, published Oct 30, 2026, 12:00 AM EDT, retrieved 2026-11-02 11:55 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Mar 13, 2026, 8:25 AM EDT Mar 18, 2026, 12:55 PM EDT Pawtuxet River, RI not stated Bypass 1.74 million gal EPA ECHO Sewer Overflow and Bypass Event report (reported to regulators) via ECHO NPDES Sewer Overflow and Bypass Event Dataset (eRule Phase 2, current versions), record RI0100153:3:1, reported Apr 14, 2026, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Mar 13, 2026 Mar 18, 2026 Pawtuxet River, RI not stated Bypassrevised not reported EPA ECHO (reported to regulators) via ri-echo-dfr, record 3687463785, published Oct 30, 2026, 12:00 AM EDT, retrieved 2026-11-02 11:55 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
May 2, 2025, 12:20 PM EDT May 2, 2025, 5:22 PM EDT Pawtuxet River, RI not stated Bypass 1.35 million gal EPA ECHO Sewer Overflow and Bypass Event report (reported to regulators) via ECHO NPDES Sewer Overflow and Bypass Event Dataset (eRule Phase 2, current versions), record RI0100153:1:1, reported May 14, 2025, 8:00 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
May 2, 2025 ended, time not reported Pawtuxet River, RI not stated Bypassrevised not reported EPA ECHO (reported to regulators) via ri-echo-dfr, record 3682638001, published Oct 30, 2026, 12:00 AM EDT, retrieved 2026-11-02 11:55 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list

History

  • Discharge events, last 12 months2Dec 2025 to Nov 2026; partly covered or sparse source
  • Days with a discharge, last 12 months7Dec 2025 to Nov 2026; partly covered or sparse source
  • Hours under advisory, last 12 months225Dec 2025 to Nov 2026; on this discharger's reports; partly covered or sparse source

Discharge events per month

3 events, Jan 2022 to Nov 2026.

  • Combined sewer overflow
  • Sanitary sewer overflow
  • Bypass, blended or other
  • No source
  • Partly covered or sparse source
Sparse sourceSparse source

No source covers 2022-01 to 2022-04. EPA ECHO sewer overflow records are sparse (only what permittees file with EPA).

Source: EPA ECHO sewer overflow events. Covered 2022-05-03 to 2026-11-02.

Show table
Discharge events per month
MonthCombined sewer overflowSanitary sewer overflowBypass, blended or otherTotalCounted fromCoverage
Jan 20220000No source
Feb 20220000No source
Mar 20220000No source
Apr 20220000No source
May 20220000Partly covered or sparse source
Jun 20220000Partly covered or sparse source
Jul 20220000Partly covered or sparse source
Aug 20220000Partly covered or sparse source
Sep 20220000Partly covered or sparse source
Oct 20220000Partly covered or sparse source
Nov 20220000Partly covered or sparse source
Dec 20220000Partly covered or sparse source
Jan 20230000Partly covered or sparse source
Feb 20230000Partly covered or sparse source
Mar 20230000Partly covered or sparse source
Apr 20230000Partly covered or sparse source
May 20230000Partly covered or sparse source
Jun 20230000Partly covered or sparse source
Jul 20230000Partly covered or sparse source
Aug 20230000Partly covered or sparse source
Sep 20230000Partly covered or sparse source
Oct 20230000Partly covered or sparse source
Nov 20230000Partly covered or sparse source
Dec 20230000Partly covered or sparse source
Jan 20240000Partly covered or sparse source
Feb 20240000Partly covered or sparse source
Mar 20240000Partly covered or sparse source
Apr 20240000Partly covered or sparse source
May 20240000Partly covered or sparse source
Jun 20240000Partly covered or sparse source
Jul 20240000Partly covered or sparse source
Aug 20240000Partly covered or sparse source
Sep 20240000Partly covered or sparse source
Oct 20240000Partly covered or sparse source
Nov 20240000Partly covered or sparse source
Dec 20240000Partly covered or sparse source
Jan 20250000Partly covered or sparse source
Feb 20250000Partly covered or sparse source
Mar 20250000Partly covered or sparse source
Apr 20250000Partly covered or sparse source
May 20250011Source recordsPartly covered or sparse source
Jun 20250000Partly covered or sparse source
Jul 20250000Partly covered or sparse source
Aug 20250000Partly covered or sparse source
Sep 20250000Partly covered or sparse source
Oct 20250000Partly covered or sparse source
Nov 20250000Partly covered or sparse source
Dec 20250000Partly covered or sparse source
Jan 20260000Partly covered or sparse source
Feb 20260000Partly covered or sparse source
Mar 20260011Source recordsPartly covered or sparse source
Apr 20260011Source recordsPartly covered or sparse source
May 20260000Partly covered or sparse source
Jun 20260000Partly covered or sparse source
Jul 20260000Partly covered or sparse source
Aug 20260000Partly covered or sparse source
Sep 20260000Partly covered or sparse source
Oct 20260000Partly covered or sparse source
Nov 20260000Partly covered or sparse source

Hours under advisory per month

Hours this discharger's reports put a water under an advisory, by the map's red rules.

  • Advisory in effect
  • No source
  • Partly covered or sparse source
Sparse sourceSparse source

No source covers 2022-01 to 2022-04. Official beach and cyanobacteria advisories are counted on water pages only. EPA ECHO sewer overflow records are sparse (only what permittees file with EPA).

Source: EPA ECHO sewer overflow events. Covered 2022-05-03 to 2026-11-02.

Show table
Hours under advisory per month
MonthHours under advisoryFrom discharge windowsHours in monthCoverage
Jan 202200744No source
Feb 202200672No source
Mar 202200744No source
Apr 202200720No source
May 202200744Partly covered or sparse source
Jun 202200720Partly covered or sparse source
Jul 202200744Partly covered or sparse source
Aug 202200744Partly covered or sparse source
Sep 202200720Partly covered or sparse source
Oct 202200744Partly covered or sparse source
Nov 202200720Partly covered or sparse source
Dec 202200744Partly covered or sparse source
Jan 202300744Partly covered or sparse source
Feb 202300672Partly covered or sparse source
Mar 202300744Partly covered or sparse source
Apr 202300720Partly covered or sparse source
May 202300744Partly covered or sparse source
Jun 202300720Partly covered or sparse source
Jul 202300744Partly covered or sparse source
Aug 202300744Partly covered or sparse source
Sep 202300720Partly covered or sparse source
Oct 202300744Partly covered or sparse source
Nov 202300720Partly covered or sparse source
Dec 202300744Partly covered or sparse source
Jan 202400744Partly covered or sparse source
Feb 202400696Partly covered or sparse source
Mar 202400744Partly covered or sparse source
Apr 202400720Partly covered or sparse source
May 202400744Partly covered or sparse source
Jun 202400720Partly covered or sparse source
Jul 202400744Partly covered or sparse source
Aug 202400744Partly covered or sparse source
Sep 202400720Partly covered or sparse source
Oct 202400744Partly covered or sparse source
Nov 202400720Partly covered or sparse source
Dec 202400744Partly covered or sparse source
Jan 202500744Partly covered or sparse source
Feb 202500672Partly covered or sparse source
Mar 202500744Partly covered or sparse source
Apr 202500720Partly covered or sparse source
May 20255353744Partly covered or sparse source
Jun 202500720Partly covered or sparse source
Jul 202500744Partly covered or sparse source
Aug 202500744Partly covered or sparse source
Sep 202500720Partly covered or sparse source
Oct 202500744Partly covered or sparse source
Nov 202500720Partly covered or sparse source
Dec 202500744Partly covered or sparse source
Jan 202600744Partly covered or sparse source
Feb 202600672Partly covered or sparse source
Mar 2026173173744Partly covered or sparse source
Apr 20265252720Partly covered or sparse source
May 202600744Partly covered or sparse source
Jun 202600720Partly covered or sparse source
Jul 202600744Partly covered or sparse source
Aug 202600744Partly covered or sparse source
Sep 202600720Partly covered or sparse source
Oct 202600744Partly covered or sparse source
Nov 20260032Partly covered or sparse source

Days with a discharge per month

A day counts when any counted discharge was under way on it (start to reported end, local time); an event with no end counts its start day.

  • No source
  • Partly covered or sparse source
Sparse sourceSparse source

No source covers 2022-01 to 2022-04.

Source: EPA ECHO sewer overflow events. Covered 2022-05-03 to 2026-11-02.

Show table
Days with a discharge per month
MonthDays with a dischargeCoverage
Jan 20220No source
Feb 20220No source
Mar 20220No source
Apr 20220No source
May 20220Partly covered or sparse source
Jun 20220Partly covered or sparse source
Jul 20220Partly covered or sparse source
Aug 20220Partly covered or sparse source
Sep 20220Partly covered or sparse source
Oct 20220Partly covered or sparse source
Nov 20220Partly covered or sparse source
Dec 20220Partly covered or sparse source
Jan 20230Partly covered or sparse source
Feb 20230Partly covered or sparse source
Mar 20230Partly covered or sparse source
Apr 20230Partly covered or sparse source
May 20230Partly covered or sparse source
Jun 20230Partly covered or sparse source
Jul 20230Partly covered or sparse source
Aug 20230Partly covered or sparse source
Sep 20230Partly covered or sparse source
Oct 20230Partly covered or sparse source
Nov 20230Partly covered or sparse source
Dec 20230Partly covered or sparse source
Jan 20240Partly covered or sparse source
Feb 20240Partly covered or sparse source
Mar 20240Partly covered or sparse source
Apr 20240Partly covered or sparse source
May 20240Partly covered or sparse source
Jun 20240Partly covered or sparse source
Jul 20240Partly covered or sparse source
Aug 20240Partly covered or sparse source
Sep 20240Partly covered or sparse source
Oct 20240Partly covered or sparse source
Nov 20240Partly covered or sparse source
Dec 20240Partly covered or sparse source
Jan 20250Partly covered or sparse source
Feb 20250Partly covered or sparse source
Mar 20250Partly covered or sparse source
Apr 20250Partly covered or sparse source
May 20251Partly covered or sparse source
Jun 20250Partly covered or sparse source
Jul 20250Partly covered or sparse source
Aug 20250Partly covered or sparse source
Sep 20250Partly covered or sparse source
Oct 20250Partly covered or sparse source
Nov 20250Partly covered or sparse source
Dec 20250Partly covered or sparse source
Jan 20260Partly covered or sparse source
Feb 20260Partly covered or sparse source
Mar 20266Partly covered or sparse source
Apr 20261Partly covered or sparse source
May 20260Partly covered or sparse source
Jun 20260Partly covered or sparse source
Jul 20260Partly covered or sparse source
Aug 20260Partly covered or sparse source
Sep 20260Partly covered or sparse source
Oct 20260Partly covered or sparse source
Nov 20260Partly covered or sparse source

Reported volume per year

Gallons, summed from the 3 events that gave a number.

  • Partly covered or sparse source
Sparse sourceSparse source

Source: EPA ECHO sewer overflow events. Covered 2022-05-03 to 2026-11-02.

Show table
Reported volume per year
YearGallonsEvents with a numberEvents withoutCoverage
2022000Partly covered or sparse source
2023000Partly covered or sparse source
2024000Partly covered or sparse source
20251,346,41710Partly covered or sparse source
20262,948,33320Partly covered or sparse source

Hours under advisory per year

Hours under advisory each year; 2026 to date.

  • Advisory in effect
  • Partly covered or sparse source
Sparse sourceSparse source

Official beach and cyanobacteria advisories are counted on water pages only.

Source: EPA ECHO sewer overflow events. Covered 2022-05-03 to 2026-11-02.

Show table
Hours under advisory per year
YearHours under advisoryShare of the yearCoverage
202200.0%Partly covered or sparse source
202300.0%Partly covered or sparse source
202400.0%Partly covered or sparse source
2025530.6%Partly covered or sparse source
20262253.1%Partly covered or sparse source

Discharge events by calendar month, all years

Every counted discharge event, by the calendar month it began.

Months are summed over every year a source covers; the table gives the number of years behind each month.

Source: EPA ECHO sewer overflow events. Covered 2022-05-03 to 2026-11-02.

Show table
Discharge events by calendar month, all years
MonthEventsYears of records
Jan00
Feb00
Mar10
Apr10
May10
Jun00
Jul00
Aug00
Sep00
Oct00
Nov00
Dec00
How these charts are counted

Discharge events are counted once: where a source publishes both public notices and verified reports (MassDEP, Vermont DEC), a discharger's month with any verified report counts its verified reports only, and other months count notices. Revisions are folded into the record they revise, and EPA copies of a state report are not counted twice. Monthly and yearly totals (Maine DEP, EPA discharge monitoring reports, Portsmouth) are shown on their own and never added to the event counts. Hours under advisory follow the map's red rules. A muted band marks periods no source covers: a gap there is missing data, not a quiet month.

  • EPA ECHO sewer overflow events: 2022-05-03 to now (sparse)