DirtyWaterWatch

Connecticut / Waters /

Norwalk River

River in Connecticut · near Norwalk

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: CT DEEP CSO/SSO Performance Dashboard (QScend), last answered 2026-11-02 11:53 UTC; ct-deep-annual, last answered 2026-11-02 11:54 UTC; ct-deep-archive, 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.

Rivers are not coloured as a whole: a discharge colours a modeled stretch downstream of its outfall, listed below when there is one.

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.

Modeled downstream reaches on Norwalk River

No discharge colours a modeled reach on this water now.

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 months3Dec 2025 to Nov 2026
  • Days with a discharge, last 12 months2Dec 2025 to Nov 2026
  • Hours under advisory, last 12 months111Dec 2025 to Nov 2026
  • 2026 season under advisory1.4%May to October; 63 h

Discharge events per month

23 events, Jan 2022 to Nov 2026. Counted from 17 verified or annual reports, 6 public notices.

  • Combined sewer overflow
  • Sanitary sewer overflow
  • Bypass, blended or other

CT DEEP dashboard records begin 2021-12-02; where CT DEEP's annual report covers a discharger's month, the annual report is counted instead. CT DEEP annual reports (Sewage Right-to-Know) cover 2021-01-01 to 2026-11-02.

Sources: CT DEEP CSO/SSO dashboard; CT DEEP Sewage Right-to-Know annual reports. Covered 2022-01-01 to 2026-11-02.

Show table
Discharge events per month
MonthCombined sewer overflowSanitary sewer overflowBypass, blended or otherTotalCounted fromCoverage
Jan 20220000
Feb 20220000
Mar 20220000
Apr 20220000
May 20220000
Jun 20220000
Jul 20220000
Aug 20220000
Sep 20220000
Oct 20220000
Nov 20220000
Dec 20220000
Jan 20230022Verified or annual reports
Feb 20230000
Mar 20230000
Apr 20230011Verified or annual reports
May 20230011Verified or annual reports
Jun 20230000
Jul 20230000
Aug 20230011Verified or annual reports
Sep 20230123Verified or annual reports
Oct 20230000
Nov 20230000
Dec 20230011Verified or annual reports
Jan 20240022Verified or annual reports
Feb 20240000
Mar 20240033Verified or annual reports
Apr 20240011Verified or annual reports
May 20240000
Jun 20240000
Jul 20240011Verified or annual reports
Aug 20240011Verified or annual reports
Sep 20240000
Oct 20240000
Nov 20240000
Dec 20240000
Jan 20250000
Feb 20250000
Mar 20250000
Apr 20250000
May 20250000
Jun 20250000
Jul 20250202Public notices (no report yet)
Aug 20250000
Sep 20250000
Oct 20250101Public notices (no report yet)
Nov 20250000
Dec 20250000
Jan 20260011Public notices (no report yet)
Feb 20260000
Mar 20260000
Apr 20260000
May 20260000
Jun 20260000
Jul 20260000
Aug 20260000
Sep 20260202Public notices (no report yet)
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

26 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. CT DEEP dashboard records begin 2021-12-02; where CT DEEP's annual report covers a discharger's month, the annual report is counted instead. CT DEEP annual reports (Sewage Right-to-Know) cover 2021-01-01 to 2026-11-02. CT DEEP's reporting archive runs 2016-07-04 to 2021-12-02.

Sources: CT DEEP CSO/SSO dashboard; CT DEEP Sewage Right-to-Know annual reports; CT DEEP reporting archive 2016-2021. Covered 2016-07-04 to 2026-11-02.

Show table
Hours under advisory per month
MonthHours under advisoryFrom discharge windowsHours in monthCoverage
Jan 202200744
Feb 202200672
Mar 202200744
Apr 202200720
May 202200744
Jun 202200720
Jul 202200744
Aug 202200744
Sep 202200720
Oct 202200744
Nov 202200720
Dec 202200744
Jan 20235151744
Feb 202300672
Mar 202300744
Apr 202300720
May 20234949744
Jun 202300720
Jul 202300744
Aug 20234949744
Sep 20239797720
Oct 20232424744
Nov 202300720
Dec 20235555744
Jan 2024122122744
Feb 202400696
Mar 2024191191744
Apr 20247676720
May 202400744
Jun 202400720
Jul 20245353744
Aug 202400744
Sep 202400720
Oct 202400744
Nov 202400720
Dec 202400744
Jan 202500744
Feb 202500672
Mar 202500744
Apr 202500720
May 202500744
Jun 202500720
Jul 2025131131744
Aug 202500744
Sep 202500720
Oct 20251515744
Nov 20253434720
Dec 202500744
Jan 20264848744
Feb 202600672
Mar 202600744
Apr 202600720
May 202600744
Jun 202600720
Jul 202600744
Aug 202600744
Sep 20266363720
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.

Sources: CT DEEP CSO/SSO dashboard; CT DEEP Sewage Right-to-Know annual reports. Covered 2022-01-01 to 2026-11-02.

Show table
Days with a discharge per month
MonthDays with a dischargeCoverage
Jan 20220
Feb 20220
Mar 20220
Apr 20220
May 20220
Jun 20220
Jul 20220
Aug 20220
Sep 20220
Oct 20220
Nov 20220
Dec 20220
Jan 20232
Feb 20230
Mar 20230
Apr 20231
May 20231
Jun 20230
Jul 20230
Aug 20231
Sep 20233
Oct 20230
Nov 20230
Dec 20231
Jan 20243
Feb 20240
Mar 20246
Apr 20243
May 20240
Jun 20240
Jul 20242
Aug 20241
Sep 20240
Oct 20240
Nov 20240
Dec 20240
Jan 20250
Feb 20250
Mar 20250
Apr 20250
May 20250
Jun 20250
Jul 20253
Aug 20250
Sep 20250
Oct 20251
Nov 20250
Dec 20250
Jan 20261
Feb 20260
Mar 20260
Apr 20260
May 20260
Jun 20260
Jul 20260
Aug 20260
Sep 20261
Oct 20260
Nov 20260

Discharge events per year, 2016 to 2026

126 events, 2016 to 2026.

  • Combined sewer overflow
  • Sanitary sewer overflow
  • Bypass, blended or other
  • Partly covered or sparse source

CT DEEP dashboard records begin 2021-12-02; where CT DEEP's annual report covers a discharger's month, the annual report is counted instead. CT DEEP annual reports (Sewage Right-to-Know) cover 2021-01-01 to 2026-11-02. CT DEEP's reporting archive runs 2016-07-04 to 2021-12-02.

Sources: CT DEEP CSO/SSO dashboard; CT DEEP Sewage Right-to-Know annual reports; CT DEEP reporting archive 2016-2021. Covered 2016-07-04 to 2026-11-02.

Show table
Discharge events per year, 2016 to 2026
YearCombined sewer overflowSanitary sewer overflowBypass, blended or otherTotalCoverage
20160314Partly covered or sparse source
201707714
2018091726
2019010919
20200459
20210141731Partly covered or sparse source
20220000
20230189
20240088
20250303
20260213

Reported volume per year

Gallons, summed from the 85 events that gave a number (41 did not).

  • Partly covered or sparse source

41 of 126 events gave no volume as a number (23 gave a range); only numbers are summed. CT DEEP's 2016-2021 archive gives volumes as ranges ("20,001 - 50,000 gallons"); they are not summed.

Sources: CT DEEP CSO/SSO dashboard; CT DEEP Sewage Right-to-Know annual reports; CT DEEP reporting archive 2016-2021. Covered 2016-07-04 to 2026-11-02.

Show table
Reported volume per year
YearGallonsEvents with a numberEvents withoutCoverage
2016004Partly covered or sparse source
20174,000131
201823,260,334242
20193,445,950163
20205,20554
20213,600,030625Partly covered or sparse source
2022000
202314,404,00090
202439,800,00080
20251,15630
202610012

Hours under advisory per year

Hours under advisory each year; 2026 to date.

  • Advisory in effect
  • Partly covered or sparse source

26 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.

Sources: CT DEEP CSO/SSO dashboard; CT DEEP Sewage Right-to-Know annual reports; CT DEEP reporting archive 2016-2021. Covered 2016-07-04 to 2026-11-02.

Show table
Hours under advisory per year
YearHours under advisoryShare of the yearCoverage
20161011.1%Partly covered or sparse source
20174995.7%
20186407.3%
20198059.2%
20202432.8%
20216257.1%Partly covered or sparse source
202200.0%
20233253.7%
20244425.0%
20251802.1%
20261111.5%

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: 2016 (share is of the covered hours). 26 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.

Sources: CT DEEP CSO/SSO dashboard; CT DEEP Sewage Right-to-Know annual reports; CT DEEP reporting archive 2016-2021. Covered 2016-07-04 to 2026-11-02.

Show table
Share of the May to October season under advisory
SeasonShare under advisoryHours under advisoryHours coveredSeason hoursPartly covered
20163.5%1012,8764,416yes
20176.8%3014,4164,416
20189.7%4274,4164,416
201912.3%5424,4164,416
20202.2%974,4164,416
202110.1%4474,4164,416
20220.0%04,4164,416
20235.0%2194,4164,416
20241.2%534,4164,416
20253.3%1464,4164,416
20261.4%634,4164,416

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.

Sources: CT DEEP CSO/SSO dashboard; CT DEEP Sewage Right-to-Know annual reports; CT DEEP reporting archive 2016-2021. Covered 2016-07-04 to 2026-11-02.

Show table
Discharge events by calendar month, all years
MonthEventsYears of records
Jan1310
Feb510
Mar510
Apr910
May510
Jun710
Jul2611
Aug1611
Sep1611
Oct1811
Nov411
Dec210

Discharge events by outfall

The 10 outfalls with the most events of 53, all years.

CT DEEP dashboard records begin 2021-12-02; where CT DEEP's annual report covers a discharger's month, the annual report is counted instead. CT DEEP annual reports (Sewage Right-to-Know) cover 2021-01-01 to 2026-11-02. CT DEEP's reporting archive runs 2016-07-04 to 2021-12-02.

Sources: CT DEEP CSO/SSO dashboard; CT DEEP Sewage Right-to-Know annual reports; CT DEEP reporting archive 2016-2021. Covered 2016-07-04 to 2026-11-02.

Show table
Discharge events by outfall
OutfallDischargerEvents
Treatment Plant, 60 South Smith StreetNorwalk WPCA22
002-1Norwalk WPCA15
Treatment Plant, 60 south Smith stNorwalk WPCF10
Treatment Plant, 60 south smith st 06855Norwalk WPCA4
Treatment Plant, 60 South Smith Street, Norwalk CTNorwalk WPCF4
Sewer Main, Smith and Wall StreetNorwalk WPCA3
Basement, 66 Grandview AveNorwalk WPCF3
Treatment Plant, 60 South Smith St, Norwalk CTNorwalk WPCF3
Sewer Main, Ann st siphonNorwalk WPCF3
Treatment Plant, 60 S Smith St, Norwalk, CTNorwalk WPCA2
Other outfalls (43)57
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.

  • CT DEEP CSO/SSO dashboard: 2021-12-02 to now
  • CT DEEP Sewage Right-to-Know annual reports: 2021-01-01 to now
  • CT DEEP reporting archive 2016-2021: 2016-07-04 to 2021-12-02

Every event on Norwalk River

Events placed on Norwalk River, newest first
StartEnd Discharger OutfallTypeVolumeSourceLinks
Sep 13, 2026, 9:30 AM EDT Sep 13, 2026, 11:30 AM EDT Norwalk WPCA Pump Station, 95 N Water St, Norwalk, CT Sanitary sewer overflow “Unable to determine due to tidal impact of receiving waters” Norwalk WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11432, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice Event: Sanitary sewer overflow, Norwalk WPCA, Sep 13, 2026, 9:30 AM EDT · Map
Sep 13, 2026, 8:30 AM EDT Sep 13, 2026, 11:30 PM EDT Norwalk WPCA Manhole, 60 S Smith St, Norwalk, CT Sanitary sewer overflow “Unknown. Please see attached memo with additional information.” Norwalk WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11476, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice Event: Sanitary sewer overflow, Norwalk WPCA, Sep 13, 2026, 8:30 AM EDT · Map
Jan 15, 2026, 10:30 AM EST Jan 15, 2026, 10:45 AM EST Norwalk WPCA Treatment Plant, 60 S Smith St, Norwalk, CT Treatment plant bypass 100 gal Norwalk WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10267, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Oct 31, 2025, 9:15 AM EDT Oct 31, 2025, 10:00 AM EDT Norwalk WPCA Manhole, 12 Lexington Ave, Norwalk, CT Sanitary sewer overflowrevised 185 gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2026) via ct-deep-annual, record 10091-2, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 11:53 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Oct 31, 2025, 9:15 AM EDT Oct 31, 2025, 10:00 AM EDT Norwalk WPCA Manhole, 12 Lexington Ave, Norwalk, CT Sanitary sewer overflowrevised 185 gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2026) via ct-deep-annual, record 10091, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 11:53 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Oct 31, 2025, 9:15 AM EDT Oct 31, 2025, 10:00 AM EDT Norwalk WPCA Manhole, 12 Lexington Ave, Norwalk, CT Sanitary sewer overflow 185 gal Norwalk WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 10091, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Jul 23, 2025, 7:30 AM EDT Jul 24, 2025, 12:00 PM EDT Norwalk WPCA Sewer Main, 6 Gordon St, Norwalk, CT Sanitary sewer overflowrevised 870 gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2026) via ct-deep-annual, record 9744-2, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 11:53 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Jul 23, 2025, 7:30 AM EDT Jul 24, 2025, 12:00 PM EDT Norwalk WPCA Sewer Main, 6 Gordon St, Norwalk, CT Sanitary sewer overflowrevised 870 gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2026) via ct-deep-annual, record 9744, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 11:53 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Jul 23, 2025, 7:30 AM EDT Jul 24, 2025, 12:00 PM EDT Norwalk WPCA Sewer Main, 6 Gordon St, Norwalk, CT Sanitary sewer overflow 870 gal Norwalk WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 9744, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Jul 11, 2025, 7:00 AM EDT Jul 11, 2025, 1:45 PM EDT Norwalk WPCA Sewer Main, 8 W Rocks Rd, Norwalk, CT Sanitary sewer overflowrevised 101 gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2026) via ct-deep-annual, record 9709-2, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 11:53 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Jul 11, 2025, 7:00 AM EDT Jul 11, 2025, 1:45 PM EDT Norwalk WPCA Sewer Main, 8 W Rocks Rd, Norwalk, CT Sanitary sewer overflowrevised 101 gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2026) via ct-deep-annual, record 9709, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 11:53 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Jul 11, 2025, 7:00 AM EDT Jul 11, 2025, 1:45 PM EDT Norwalk WPCA Sewer Main, 8 W Rocks Rd, Norwalk, CT Sanitary sewer overflow 101 gal Norwalk WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 9709, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Aug 18, 2024, 9:30 AM EDT Aug 18, 2024, 6:45 AM EDT Norwalk WPCA 002-1 Treatment plant bypass 9.1 million gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2025) via ct-deep-annual, record x7b792fb3384e, published Mar 31, 2025, 1:52 PM EDT, retrieved 2026-11-02 11:53 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Aug 18, 2024, 9:30 AM EDT Aug 18, 2024, 6:45 AM EDT Norwalk WPCA 002-1 Treatment plant bypass 9.1 million gal Norwalk WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 8548, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Jul 17, 2024, 7:15 PM EDT Jul 18, 2024, 12:00 AM EDT Norwalk WPCA 002-1 Treatment plant bypass 2.58 million gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2025) via ct-deep-annual, record xe52ceaa315f8, published Mar 31, 2025, 1:52 PM EDT, retrieved 2026-11-02 11:53 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Jul 17, 2024, 7:15 PM EDT Jul 18, 2024, 12:00 AM EDT Norwalk WPCA 002-1 Treatment plant bypass 2.58 million gal Norwalk WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 9034, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Apr 3, 2024, 8:45 PM EDT Apr 5, 2024, 1:00 AM EDT Norwalk WPCA 002-1 Treatment plant bypass 2.21 million gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2025) via ct-deep-annual, record x9ffc78a448a9, published Mar 31, 2025, 1:52 PM EDT, retrieved 2026-11-02 11:53 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Mar 23, 2024, 4:15 PM EDT Mar 24, 2024, 12:15 AM EDT Norwalk WPCA 002-1 Treatment plant bypass 5.14 million gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2025) via ct-deep-annual, record xf5692ec130ac, published Mar 31, 2025, 1:52 PM EDT, retrieved 2026-11-02 11:53 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Mar 23, 2024, 4:15 PM EDT Mar 24, 2024, 12:15 AM EDT Norwalk WPCA 002-1 Treatment plant bypass 5.14 million gal Norwalk WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 5702, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Mar 9, 2024, 10:15 PM EST Mar 10, 2024, 10:30 PM EDT Norwalk WPCA 002-1 Treatment plant bypass 5.14 million gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2025) via ct-deep-annual, record xa9e12514dc3b, published Mar 31, 2025, 1:52 PM EDT, retrieved 2026-11-02 11:53 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Mar 9, 2024, 10:15 PM EST Mar 10, 2024, 10:30 PM EDT Norwalk WPCA 002-1 Treatment plant bypass 5.14 million gal Norwalk WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 5595, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Mar 6, 2024, 9:15 PM EST Mar 7, 2024, 1:00 PM EST Norwalk WPCA 002-1 Treatment plant bypass 4.27 million gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2025) via ct-deep-annual, record xc3665680cbba, published Mar 31, 2025, 1:52 PM EDT, retrieved 2026-11-02 11:53 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Mar 6, 2024, 9:15 PM EST Mar 7, 2024, 1:00 PM EST Norwalk WPCA 002-1 Treatment plant bypass 4.27 million gal Norwalk WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 5541, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Jan 13, 2024, 5:45 AM EST Jan 13, 2024, 4:30 PM EST Norwalk WPCA 002-1 Treatment plant bypass 7.09 million gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2025) via ct-deep-annual, record xbc34d4323b0f, published Mar 31, 2025, 1:52 PM EDT, retrieved 2026-11-02 11:53 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Jan 13, 2024, 5:45 AM EST Jan 13, 2024, 4:30 PM EST Norwalk WPCA 002-1 Treatment plant bypass 7.09 million gal Norwalk WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 5251, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Jan 9, 2024, 10:30 PM EST Jan 10, 2024, 1:15 PM EST Norwalk WPCA 002-1 Treatment plant bypass 4.27 million gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2025) via ct-deep-annual, record x7711b0547625, published Mar 31, 2025, 1:52 PM EDT, retrieved 2026-11-02 11:53 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Jan 9, 2024, 10:30 PM EST Jan 10, 2024, 1:15 PM EST Norwalk WPCA 002-1 Treatment plant bypass 4.27 million gal Norwalk WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 5135, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Dec 28, 2023, 7:30 AM EST Dec 28, 2023, 2:45 PM EST Norwalk WPCA 002-1 Treatment plant bypass 1.79 million gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2024) via ct-deep-annual, record xf7cdd3bcda9a, published Jan 9, 2025, 2:55 PM EST, retrieved 2026-11-02 11:53 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Sep 29, 2023, 1:00 PM EDT Sep 29, 2023, 3:00 PM EDT Norwalk WPCA Manhole, 3 Armstrong Ct, Norwalk, CT Sanitary sewer overflow 3,000 gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2024) via ct-deep-annual, record xb5111c1cfd26, published Jan 9, 2025, 2:55 PM EST, retrieved 2026-11-02 11:53 UTC · notice record below · Map
Full record (older than 180 days, so no page of its own)

This record in the archive list
Sep 29, 2023, 12:00 AM EDT Sep 30, 2023, 12:00 AM EDT Norwalk WPCA 002-1 Treatment plant bypass 11.42 million gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2024) via ct-deep-annual, record xaea24e37f6cf, published Jan 9, 2025, 2:55 PM EST, retrieved 2026-11-02 11:53 UTC · notice record below · Map
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Sep 10, 2023, 1:00 PM EDT Sep 10, 2023, 2:15 PM EDT Norwalk WPCA 002-1 Treatment plant bypass 56,000 gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2024) via ct-deep-annual, record xef57f9d9e5ce, published Jan 9, 2025, 2:55 PM EST, retrieved 2026-11-02 11:53 UTC · notice record below · Map
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Aug 18, 2023, 7:15 AM EDT Aug 18, 2023, 8:00 AM EDT Norwalk WPCA 002-1 Treatment plant bypass 100,000 gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2024) via ct-deep-annual, record xd0e57a1ea6d0, published Jan 9, 2025, 2:55 PM EST, retrieved 2026-11-02 11:53 UTC · notice record below · Map
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May 20, 2023, 7:00 PM EDT May 20, 2023, 7:45 PM EDT Norwalk WPCA 002-1 Treatment plant bypass 20,000 gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2024) via ct-deep-annual, record xfe90e350c9c2, published Jan 9, 2025, 2:55 PM EST, retrieved 2026-11-02 11:53 UTC · notice record below · Map
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Apr 30, 2023, 11:30 PM EDT Apr 30, 2023, 12:30 AM EDT Norwalk WPCA 002-1 Treatment plant bypass 60,000 gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2024) via ct-deep-annual, record x5826636fbe2e, published Jan 9, 2025, 2:55 PM EST, retrieved 2026-11-02 11:53 UTC · notice record below · Map
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Jan 26, 2023, 11:45 PM EST Jan 26, 2023, 2:15 AM EST Norwalk WPCA Treatment Plant, 60 S Smith St, Norwalk, CT Treatment plant bypass 5,000 gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2024) via ct-deep-annual, record x6b834540b2a0, published Jan 9, 2025, 2:55 PM EST, retrieved 2026-11-02 11:53 UTC · notice record below · Map
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Jan 25, 2023, 11:45 PM EST Jan 26, 2023, 2:15 AM EST Norwalk WPCA 002-1 Treatment plant bypass 950,000 gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2024) via ct-deep-annual, record x3c2eb8071090, published Jan 9, 2025, 2:55 PM EST, retrieved 2026-11-02 11:53 UTC · notice record below · Map
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Jan 25, 2023, 11:45 PM EST Jan 26, 2023, 2:15 AM EST Norwalk WPCA 002-1 Treatment plant bypass 65 million gal Norwalk WPCA (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 2037, the source gives no report time, retrieved 2026-11-02 11:20 UTC · notice record below · Map
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Oct 26, 2021, 9:40 AM EDT Oct 26, 2021, 11:45 PM EDT Norwalk WPCA Treatment Plant, 60 South Smith Street Treatment plant bypass 1 million gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2022) via ct-deep-annual, record x73bae64de74a, published Oct 9, 2024, 12:47 PM EDT, retrieved 2026-11-02 11:53 UTC · notice record below · Map
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Oct 26, 2021, 9:40 AM EDT Oct 26, 2021, 11:45 PM EDT Norwalk WPCF Treatment Plant, 60 South Smith Street Treatment plant bypass “Over 1,000,000 gallons” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35963254, reported Oct 26, 2021, 2:43 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Oct 26, 2021, 9:40 AM EDT Oct 26, 2021, 11:45 PM EDT Norwalk WPCF Treatment Plant, 60 South Smith Street Treatment plant bypass “Over 1,000,000 gallons” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35963253, reported Oct 26, 2021, 2:43 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Oct 26, 2021, 9:40 AM EDT not reported Norwalk WPCF Treatment Plant, 60 South Smith Street Treatment plant bypass “Over 1,000,000 gallons” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35963252, the source gives no report time, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Oct 19, 2021, 11:00 AM EDT Oct 19, 2021, 11:00 AM EDT Norwalk WPCF Basement, 66 Grandview Ave Sanitary sewer overflow “Undetermined” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35965018, reported Oct 19, 2021, 11:27 AM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Oct 19, 2021, 11:00 AM EDT Oct 19, 2021, 11:00 AM EDT Norwalk WPCF Basement, 66 Grandview Ave Sanitary sewer overflow “Undetermined” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35965017, reported Oct 19, 2021, 11:27 AM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Oct 19, 2021, 11:00 AM EDT not reported Norwalk WPCF Basement, 66 Grandview Ave Sanitary sewer overflow “Undetermined” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964690, reported Oct 19, 2021, 11:27 AM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Sep 1, 2021, 9:59 PM EDT Sep 1, 2021, 9:59 PM EDT Norwalk WPCA Treatment Plant, 60 South Smith Street. Norwalk, CT 06855 Treatment plant bypass 1 million gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2022) via ct-deep-annual, record x37848746d544, published Oct 9, 2024, 12:47 PM EDT, retrieved 2026-11-02 11:53 UTC · notice record below · Map
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Sep 1, 2021, 9:59 PM EDT not reported Norwalk WPCF Treatment Plant, 60 South Smith Street. Norwalk, CT 06855 Treatment plant bypass “Undetermined” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35963235, reported Sep 1, 2021, 11:06 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Aug 11, 2021, 9:32 AM EDT Aug 11, 2021, 12:00 AM EDT Norwalk WPCA Sewer Main, Smith and Wall Street Sanitary sewer overflow 30 gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2022) via ct-deep-annual, record xff376ef0ab27, published Oct 9, 2024, 12:47 PM EDT, retrieved 2026-11-02 11:53 UTC · notice record below · Map
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Aug 11, 2021, 9:32 AM EDT Aug 11, 2021, 12:00 AM EDT Norwalk WPCF Sewer Main, Smith and Wall Street Sanitary sewer overflow “1 - 50” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964064, reported Aug 11, 2021, 9:40 AM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Aug 11, 2021, 9:32 AM EDT not reported Norwalk WPCF Sewer Main, Smith and Wall Street Sanitary sewer overflow “1 - 50” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964063, reported Aug 11, 2021, 9:40 AM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Aug 3, 2021, 9:00 AM EDT Aug 3, 2021, 9:01 AM EDT Norwalk WPCF Treatment Plant, 60 South Smith Street Treatment plant bypass “51 - 500 gallons” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964078, reported Aug 3, 2021, 10:46 AM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Aug 3, 2021, 9:00 AM EDT Aug 3, 2021, 12:00 AM EDT Norwalk WPCF Treatment Plant, 60 South Smith Street Treatment plant bypass “51 - 500 gallons” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964077, reported Aug 3, 2021, 10:46 AM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Aug 3, 2021, 9:00 AM EDT not reported Norwalk WPCF Treatment Plant, 60 South Smith Street Treatment plant bypass “51 - 500 gallons” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964076, reported Aug 3, 2021, 10:46 AM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jul 9, 2021, 7:25 AM EDT Jul 10, 2021, 5:30 PM EDT Norwalk WPCA Treatment Plant, 60 South Smith Street Treatment plant bypass 1 million gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2022) via ct-deep-annual, record xf7d925f37ec0, published Oct 9, 2024, 12:47 PM EDT, retrieved 2026-11-02 11:53 UTC · notice record below · Map
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Jul 9, 2021, 7:25 AM EDT Jul 10, 2021, 5:30 PM EDT Norwalk WPCF Treatment Plant, 60 South Smith Street Treatment plant bypass “Over 1,000,000 gallons” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35962852, reported Jul 9, 2021, 12:01 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jul 9, 2021, 7:25 AM EDT Jul 10, 2021, 5:30 PM EDT Norwalk WPCF Treatment Plant, 60 South Smith Street Treatment plant bypass “Over 1,000,000 gallons” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35962851, reported Jul 9, 2021, 12:01 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jul 9, 2021, 7:25 AM EDT not reported Norwalk WPCF Treatment Plant, 60 South Smith Street Treatment plant bypass “Over 1,000,000 gallons” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35962850, reported Jul 9, 2021, 12:01 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jul 2, 2021, 11:49 PM EDT Jul 3, 2021, 2:06 PM EDT Norwalk WPCA Treatment Plant, 60 south smith st 06855 Treatment plant bypass 300,000 gal Norwalk WPCA (CT DEEP Sewage Right-to-Know annual report 2022) via ct-deep-annual, record x857c94164dc1, published Oct 9, 2024, 12:47 PM EDT, retrieved 2026-11-02 11:53 UTC · notice record below · Map
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Jul 2, 2021, 11:49 PM EDT Jul 3, 2021, 2:06 PM EDT Norwalk WPCF Treatment Plant, 60 south smith st 06855 Treatment plant bypass 300,000 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35963262, reported Jul 3, 2021, 1:42 AM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jul 2, 2021, 11:49 PM EDT Jul 3, 2021, 2:06 PM EDT Norwalk WPCF Treatment Plant, 60 south smith st 06855 Treatment plant bypass “Over 1,000,000 gallons” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35963250, reported Jul 3, 2021, 1:42 AM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jul 2, 2021, 11:49 PM EDT not reported Norwalk WPCF Treatment Plant, 60 south smith st 06855 Treatment plant bypass “Over 1,000,000 gallons” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35963234, reported Jul 3, 2021, 1:42 AM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jun 1, 2021, 7:50 AM EDT Jun 1, 2021, 8:15 AM EDT Norwalk WPCF 32 Douglas Dr. Norwalk, Ct Sanitary sewer overflow “51 - 500 gallons” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964686, reported Jun 1, 2021, 8:58 AM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jun 1, 2021, 7:50 AM EDT not reported Norwalk WPCF 32 Douglas Dr. Norwalk, Ct Sanitary sewer overflow “51 - 500 gallons” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964685, reported Jun 1, 2021, 8:58 AM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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May 25, 2021, 3:15 PM EDT May 25, 2021, 3:45 PM EDT Norwalk WPCF Manhole, Marshall, North Water Sanitary sewer overflow “51 - 500 gallons” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964780, reported May 25, 2021, 4:34 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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May 25, 2021, 3:15 PM EDT not reported Norwalk WPCF Manhole, Marshall, North Water Sanitary sewer overflow “51 - 500 gallons” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964779, the source gives no report time, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Feb 23, 2021, 8:30 AM EST Feb 26, 2021, 6:00 PM EST Norwalk WPCF Sewer Main, 44 Orchard Street Sanitary sewer overflow “Undetermined” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964893, reported Feb 23, 2021, 9:36 AM EST, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Feb 23, 2021, 8:30 AM EST not reported Norwalk WPCF Sewer Main, 44 Orchard Street Sanitary sewer overflow “Undetermined” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964892, reported Feb 23, 2021, 9:36 AM EST, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jan 3, 2021, 4:15 PM EST Jan 3, 2021, 4:15 PM EST Norwalk WPCF Basement, 11 Charles Street Sanitary sewer overflow “51 - 500 gallons” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964837, reported Jan 3, 2021, 6:20 PM EST, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jan 3, 2021, 4:15 PM EST not reported Norwalk WPCF Basement, 11 Charles Street Sanitary sewer overflow “51 - 500 gallons” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964836, reported Jan 3, 2021, 6:20 PM EST, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jul 15, 2020, 8:15 AM EDT Jul 15, 2020, 8:15 AM EDT Norwalk WPCF Treatment Plant, 15 South Smith Street Treatment plant bypass 5 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964138, reported Jul 15, 2020, 9:36 AM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jul 1, 2020, 10:26 PM EDT Jul 1, 2020, 11:15 PM EDT Norwalk WPCF Treatment Plant, 60 south Smith st Treatment plant bypass “Undetermined” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35963743, reported Jul 1, 2020, 11:33 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jul 1, 2020, 10:26 PM EDT Jul 1, 2020, 11:15 PM EDT Norwalk WPCF Treatment Plant, 60 south Smith st Treatment plant bypass “Undetermined” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35963742, reported Jul 1, 2020, 11:33 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jul 1, 2020, 10:26 PM EDT not reported Norwalk WPCF Treatment Plant, 60 south Smith st Treatment plant bypass “Undetermined” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35963741, reported Jul 1, 2020, 11:33 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Apr 19, 2020, 6:30 PM EDT Apr 19, 2020, 7:45 PM EDT Norwalk WPCF Manhole, 42 Bouton St Sanitary sewer overflow 2,500 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964715, reported Apr 19, 2020, 8:39 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Apr 19, 2020, 6:30 PM EDT Apr 19, 2020, 7:45 PM EDT Norwalk WPCF Manhole, 42 Bouton St Sanitary sewer overflow 2,500 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964714, reported Apr 19, 2020, 8:39 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Apr 19, 2020, 6:30 PM EDT not reported Norwalk WPCF 42 Bouton St Sanitary sewer overflow “Undetermined” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964681, reported Apr 19, 2020, 8:39 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jan 27, 2020, 7:30 AM EST Jan 27, 2020, 8:00 AM EST Norwalk WPCF Manhole, 34 Park st Norwalk CT Sanitary sewer overflow 100 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35965194, reported Jan 27, 2020, 9:38 AM EST, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jan 15, 2020, 2:53 PM EST Jan 15, 2020, 3:30 PM EST Norwalk WPCF Treatment Plant, 60 South Smith Street Treatment plant bypass 100 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964131, reported Jan 15, 2020, 4:48 PM EST, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Dec 14, 2019, 3:20 AM EST Dec 14, 2019, 5:30 PM EST Norwalk WPCF Treatment Plant, 60 South Smith St Treatment plant bypass 2.1 million gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35963750, reported Dec 14, 2019, 3:47 AM EST, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Oct 27, 2019, 4:10 PM EDT Oct 27, 2019, 5:10 PM EDT Norwalk WPCF Manhole, 6 Gwendalyn Street Sanitary sewer overflow 3,000 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35963305, reported Oct 27, 2019, 4:42 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Oct 27, 2019, 1:55 PM EDT Oct 27, 2019, 5:58 PM EDT Norwalk WPCF Treatment Plant, 60 South Smith St Treatment plant bypass “Over 1,000,000 gallons” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35963233, reported Oct 27, 2019, 2:10 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Oct 15, 2019, 11:01 PM EDT not reported Norwalk WPCF Treatment Plant, 60 South Smith Street Treatment plant bypass “Undetermined” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35963636, reported Oct 17, 2019, 12:24 AM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Aug 19, 2019, 6:00 PM EDT Aug 19, 2019, 6:30 PM EDT Norwalk WPCF Basement, 20 knight st ,Norwalk ct 06851 Sanitary sewer overflow 500 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35963641, reported Aug 19, 2019, 7:11 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Aug 19, 2019, 5:50 PM EDT Aug 19, 2019, 6:22 PM EDT Norwalk WPCF Treatment Plant, 60 South Smith St Norwalk Ct Treatment plant bypass 30,000 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35963579, reported Aug 19, 2019, 7:27 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Aug 8, 2019, 11:20 AM EDT Aug 8, 2019, 11:25 AM EDT Norwalk WPCF Treatment Plant, 60 South Smith St, Norwalk CT 06855 Treatment plant bypass 50 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35964121, reported Aug 8, 2019, 12:35 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Aug 5, 2019, 2:00 PM EDT Aug 5, 2019, 2:20 PM EDT Norwalk WPCF Lateral - Private, 108 New Canaan Ave, Norwalk CT Sanitary sewer overflow 200 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35965461, reported Aug 5, 2019, 3:37 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Aug 5, 2019, 2:00 PM EDT Aug 5, 2019, 2:20 PM EDT Norwalk WPCF Lateral - Private, 108 New Canaan Ave, Norwalk CT Sanitary sewer overflow 200 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35965460, reported Aug 5, 2019, 3:37 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jul 22, 2019, 8:40 PM EDT Jul 22, 2019, 9:52 PM EDT Norwalk WPCF Treatment Plant, 60 South Smith St, Norwalk CT Treatment plant bypass 110,000 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35962989, reported Jul 23, 2019, 8:10 AM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jul 18, 2019, 11:15 AM EDT Jul 18, 2019, 3:30 PM EDT Norwalk WPCF Treatment Plant, 60 South Smith Street Treatment plant bypass 320,000 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35962988, reported Jul 18, 2019, 12:04 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jul 15, 2019, 12:00 PM EDT Jul 18, 2019, 5:00 PM EDT Norwalk WPCF Sewer Main, Norwalk, CT Sanitary sewer overflow 0 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35963011, reported Jul 15, 2019, 2:29 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jul 8, 2019, 5:00 PM EDT Jul 11, 2019, 4:00 PM EDT Norwalk WPCF Sewer Main, Norwalk, CT Sanitary sewer overflow 0 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35963004, reported Jul 12, 2019, 3:40 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jun 27, 2019, 2:15 PM EDT Jun 27, 2019, 5:30 PM EDT Norwalk WPCF Sewer Main, 110 Spring Hill Rd, Norwalk CT Sanitary sewer overflow 0 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35963006, reported Jul 2, 2019, 3:24 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Apr 16, 2019, 3:00 AM EDT Apr 16, 2019, 3:00 AM EDT Norwalk WPCF Pump Station, 10 Seaview Ave, Norwalk CT Sanitary sewer overflow 0 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35962885, reported Apr 15, 2019, 10:26 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Mar 23, 2019, 10:26 PM EDT Mar 23, 2019, 9:30 PM EDT Norwalk WPCF Sewer Main, 216 New Canaan Avenue Sanitary sewer overflow 500 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35965303, reported Mar 23, 2019, 11:05 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jan 24, 2019, 1:05 PM EST Jan 24, 2019, 7:10 PM EST Norwalk WPCF Treatment Plant, 60 South Smith St Treatment plant bypass 880,000 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35963581, reported Jan 24, 2019, 1:33 PM EST, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jan 15, 2019, 10:00 AM EST Jan 15, 2019, 12:00 PM EST Norwalk WPCF Treatment Plant, 60 South Smith St, Norwalk, CT Treatment plant bypass “1 - 50” Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35965354, reported Jan 15, 2019, 10:46 AM EST, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Jan 2, 2019, 8:30 AM EST Jan 2, 2019, 9:55 AM EST Norwalk WPCF Sewer Main, 29 West Rock Road. Sanitary sewer overflow 1,500 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35965026, reported Jan 2, 2019, 10:05 AM EST, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Nov 5, 2018, 9:30 AM EST Nov 5, 2018, 9:45 AM EST Norwalk WPCF Treatment Plant, 60 South Smith St, Norwalk CT 06855 Treatment plant bypass 50 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35965552, reported Nov 5, 2018, 11:22 AM EST, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Oct 29, 2018, 10:00 AM EDT Oct 29, 2018, 10:15 AM EDT Norwalk WPCF Treatment Plant, 60 South Smith St, Norwalk, CT Treatment plant bypass 50 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35965551, reported Oct 29, 2018, 12:03 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Oct 27, 2018, 11:30 AM EDT Oct 27, 2018, 2:30 PM EDT Norwalk WPCF Manhole, 2 Wall Street Sanitary sewer overflow 9,000 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35965625, reported Oct 27, 2018, 12:06 PM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Oct 24, 2018, 9:15 AM EDT Oct 24, 2018, 9:30 AM EDT Norwalk WPCF Treatment Plant, 60 South Smith Street Treatment plant bypass 50 gal Norwalk WPCF (CT DEEP reporting archive 2016-2021) via ct-deep-archive, record bypass-35965399, reported Oct 24, 2018, 10:27 AM EDT, retrieved 2026-11-02 11:54 UTC · notice record below · Map
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Showing the newest 100 events of 140 events. See them all with filters.

Outfalls on this water

No outfall in the registry is matched to this water.

Dischargers: City of Norwalk WPCA (Norwalk WPCF) - NPDES permitted secondary-treatment bypass and Ann Street Siphon emergency overflow.

Launches

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

Sources covering this water

140 events placed on this water in this build.