DirtyWaterWatch

Massachusetts / Waters /

Lake Quinsigamond

Lake in Massachusetts · near Shrewsbury, Worcester

Status now

No current report

At least one source we follow covers this water, and nothing it reports applies right now.

Why this colour: No current report: nothing a covering source reports colours this water now. How long a water stays coloured, and why

Source: MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), last answered 2026-11-02 11:54 UTC. Status computed by DirtyWaterWatch as of 2026-11-02 11:56 UTC.

It is not a finding about the water. Discharges go unreported, reports arrive late, and storm runoff carries bacteria too. Follow posted signs and local health advice.

As of Nov 2, 2026, 6:56 AM EST.

Map

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.

Outfalls are small brown dots.

The last 90 days

Last 90 days, hour by hour. Red: advisory in effect; yellow: caution; hatched yellow: unresolved, no end reported; grey: no current report; hatched purple: a source was not updating.

Source: hourly statuses computed by DirtyWaterWatch (pipeline build/status.py) from the events linked above and the rules on the methods page; history as of 2026-11-02 11:56 UTC.

Discharges over the years

  • Discharge events, last 12 months1Dec 2025 to Nov 2026
  • Days with a discharge, last 12 months1Dec 2025 to Nov 2026
  • Hours under advisory, last 12 months0Dec 2025 to Nov 2026
  • 2026 season under advisory0.0%May to October; 0 h

Discharge events per month

3 events, Jan 2022 to Nov 2026. Counted from 2 verified or annual reports, 1 public notices.

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

No source covers 2022-01 to 2022-05. MassDEP portal records begin 2022-06-30. Verified Data Reports arrive after the month ends, so the latest months count public notices.

Source: MassDEP sewage notification portal. Covered 2022-06-30 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 20220000No source
Jun 20220000Partly covered or sparse source
Jul 20220000
Aug 20220000
Sep 20220000
Oct 20220000
Nov 20220000
Dec 20220101Verified or annual reports
Jan 20230000
Feb 20230000
Mar 20230000
Apr 20230000
May 20230000
Jun 20230000
Jul 20230000
Aug 20230000
Sep 20230000
Oct 20230000
Nov 20230000
Dec 20230000
Jan 20240000
Feb 20240101Verified or annual reports
Mar 20240000
Apr 20240000
May 20240000
Jun 20240000
Jul 20240000
Aug 20240000
Sep 20240000
Oct 20240000
Nov 20240000
Dec 20240000
Jan 20250000
Feb 20250000
Mar 20250000
Apr 20250000
May 20250000
Jun 20250000
Jul 20250000
Aug 20250000
Sep 20250000
Oct 20250000
Nov 20250000
Dec 20250000
Jan 20260000
Feb 20260000
Mar 20260000
Apr 20260000
May 20260000
Jun 20260000
Jul 20260101Public notices (no report yet)
Aug 20260000
Sep 20260000
Oct 20260000
Nov 20260000

Hours under advisory per month

Hours this water was under an advisory, by the map's red rules.

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

No source covers 2022-01 to 2022-05. 1 discharge events have no reported end and no ongoing status; under the status rules they set caution, not an advisory, and add no hours here. MassDEP portal records begin 2022-06-30. Verified Data Reports arrive after the month ends, so the latest months count public notices.

Source: MassDEP sewage notification portal. Covered 2022-06-30 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 202200744No source
Jun 202200720Partly covered or sparse source
Jul 202200744
Aug 202200744
Sep 202200720
Oct 202200744
Nov 202200720
Dec 20224949744
Jan 202300744
Feb 202300672
Mar 202300744
Apr 202300720
May 202300744
Jun 202300720
Jul 202300744
Aug 202300744
Sep 202300720
Oct 202300744
Nov 202300720
Dec 202300744
Jan 202400744
Feb 20245353696
Mar 202400744
Apr 202400720
May 202400744
Jun 202400720
Jul 202400744
Aug 202400744
Sep 202400720
Oct 202400744
Nov 202400720
Dec 202400744
Jan 202500744
Feb 202500672
Mar 202500744
Apr 202500720
May 202500744
Jun 202500720
Jul 202500744
Aug 202500744
Sep 202500720
Oct 202500744
Nov 202500720
Dec 202500744
Jan 202600744
Feb 202600672
Mar 202600744
Apr 202600720
May 202600744
Jun 202600720
Jul 202600744
Aug 202600744
Sep 202600720
Oct 202600744
Nov 20260032

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
No source

No source covers 2022-01 to 2022-05.

Source: MassDEP sewage notification portal. Covered 2022-06-30 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 20220No source
Jun 20220Partly covered or sparse source
Jul 20220
Aug 20220
Sep 20220
Oct 20220
Nov 20220
Dec 20221
Jan 20230
Feb 20230
Mar 20230
Apr 20230
May 20230
Jun 20230
Jul 20230
Aug 20230
Sep 20230
Oct 20230
Nov 20230
Dec 20230
Jan 20240
Feb 20241
Mar 20240
Apr 20240
May 20240
Jun 20240
Jul 20240
Aug 20240
Sep 20240
Oct 20240
Nov 20240
Dec 20240
Jan 20250
Feb 20250
Mar 20250
Apr 20250
May 20250
Jun 20250
Jul 20250
Aug 20250
Sep 20250
Oct 20250
Nov 20250
Dec 20250
Jan 20260
Feb 20260
Mar 20260
Apr 20260
May 20260
Jun 20260
Jul 20261
Aug 20260
Sep 20260
Oct 20260
Nov 20260

Reported volume per year

Gallons, summed from the 2 events that gave a number (1 did not).

  • Partly covered or sparse source
Sparse source

1 of 3 events gave no volume as a number; only numbers are summed.

Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.

Show table
Reported volume per year
YearGallonsEvents with a numberEvents withoutCoverage
20221,50010Partly covered or sparse source
2023000
2024193,38010
2025000
2026001

Hours under advisory per year

Hours under advisory each year; 2026 to date.

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

1 discharge events have no reported end and no ongoing status; under the status rules they set caution, not an advisory, and add no hours here.

Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.

Show table
Hours under advisory per year
YearHours under advisoryShare of the yearCoverage
2022490.6%Partly covered or sparse source
202300.0%
2024530.6%
202500.0%
202600.0%

Share of the May to October season under advisory

Share of the hours from May 1 to October 31 with an advisory in effect.

  • Advisory in effect
  • Season partly covered

Seasons only partly covered by a source: 2022 (share is of the covered hours). 1 discharge events have no reported end and no ongoing status; under the status rules they set caution, not an advisory, and add no hours here.

Source: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.

Show table
Share of the May to October season under advisory
SeasonShare under advisoryHours under advisoryHours coveredSeason hoursPartly covered
20220.0%02,9584,416yes
20230.0%04,4164,416
20240.0%04,4164,416
20250.0%04,4164,416
20260.0%04,4164,416

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: MassDEP sewage notification portal. Covered 2022-06-30 to 2026-11-02.

Show table
Discharge events by calendar month, all years
MonthEventsYears of records
Jan04
Feb14
Mar04
Apr04
May04
Jun05
Jul15
Aug05
Sep05
Oct05
Nov05
Dec14
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.

  • MassDEP sewage notification portal: 2022-06-30 to now

Every event on Lake Quinsigamond

Events placed on Lake Quinsigamond, newest first
StartEnd Discharger OutfallTypeVolumeSourceLinks
Jul 24, 2026, 5:20 AM EDT ended, time not reported CITY OF WORCESTER not stated Sanitary sewer overflow not reported CITY OF WORCESTER (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 484950b0-2d74-4213-b58d-f9951958d082, published Jul 24, 2026, 1:32 PM EDT, retrieved 2026-11-02 10:58 UTC · notice Event: Sanitary sewer overflow, CITY OF WORCESTER, Jul 24, 2026, 5:20 AM EDT · Map
Feb 20, 2024, 6:00 PM EST Feb 20, 2024, 10:30 PM EST CITY OF WORCESTER not stated Sanitary sewer overflow 193,380 gal CITY OF WORCESTER (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record f4b77de8-a269-4f09-a05e-1fa01427b7e1, published Feb 28, 2024, 4:21 PM EST, retrieved 2026-11-02 10:58 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Feb 20, 2024, 6:00 PM EST ended, time not reported CITY OF WORCESTER not stated Sanitary sewer overflow not reported CITY OF WORCESTER (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record edd37763-65be-4c5c-927d-8dc02e039c2c, published Feb 21, 2024, 4:23 PM EST, retrieved 2026-11-02 10:58 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Dec 24, 2022, 3:00 PM EST Dec 24, 2022, 3:30 PM EST SHREWSBURY DEPARTMENT OF PUBLIC WORKS not stated Sanitary sewer overflow 1,500 gal SHREWSBURY DEPARTMENT OF PUBLIC WORKS (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 175c1a4e-7dbe-422b-87bc-b5dbf4d8eb91, published Dec 27, 2022, 11:45 AM EST, retrieved 2026-11-02 10:58 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Dec 24, 2022, 3:00 PM EST ended, time not reported SHREWSBURY DEPARTMENT OF PUBLIC WORKS not stated Sanitary sewer overflow not reported SHREWSBURY DEPARTMENT OF PUBLIC WORKS (MassDEP sewage notification portal) via MassDEP CSO API behind the portal (eeaonline.eea.state.ma.us/dep/CSOAPI/api/), record 787c1780-38db-4cdc-bf00-5a063c5370a1, published Dec 27, 2022, 11:20 AM EST, retrieved 2026-11-02 10:58 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list

Outfalls on this water

No outfall in the registry is matched to this water.

Dischargers: City of Worcester (Quinsigamond Avenue CSO treatment facility).

Launches

Source: OpenBoatLaunch launch records (public agency data and OpenStreetMap, ODbL). · Lake Quinsigamond on OpenBoatLaunch

Sources covering this water

5 events placed on this water in this build.