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Connecticut / Waters /

Pequabuck River

River in Connecticut, past Bristol, Harwinton and Plymouth

Current status

Discharge or advisory reported

A discharge is reported as ongoing, a post-discharge period applies, or an official advisory is listed. Open the report for its source, dates and advice. This status since . Why this status, and its source

This status counts every report affecting this water, including discharges arriving from upstream.

This badge describes the water outline. Check the downstream stretches on the map and below for discharge statuses.

Map sources: water outlines and launches from OpenBoatLaunch and OpenStreetMap contributors (Open Database License); wastewater outlets from EPA and state records; downstream estimates by DirtyWaterWatch using U.S. Geological Survey maps and flow data. Base map: OpenFreeMap and OpenMapTiles.

Dashed river stretches are estimates.

Check BRISTOL WATER RECLAMATION FAC.'s notices · Bookmark this water page and check it before each trip · Report a missing notice or error

About this status

Discharge or advisory reported: discharge reported as ongoing; shown while reported ongoing, up to 7 days without an end (site rule)

Source: BRISTOL WATER RECLAMATION FAC. (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11643, the source gives no report time, retrieved 2026-11-03 10:02 UTC · Original notice · Updated

Reports behind this status

Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater.

Reports behind the status of Pequabuck River, newest first
WhenReportStatus
BRISTOL WATER RECLAMATION FAC. · Sewer Main, 284 West St, Bristol, CT · SSO · 10 gallons report · notice · mapto Nov 9, 11:30 AM

Sources: CT DEEP CSO/SSO Performance Dashboard (QScend), retrieved 2026-11-03 10:02 UTC. A report's record id and times show when you hover or focus its "report" link.

Estimated downstream stretches on Pequabuck River

Estimated downstream stretch — not checked by water sampling. Estimated by DirtyWaterWatch using U.S. Geological Survey river maps and flow measurements; not an official advisory area.

Estimated routes below wastewater outlets

Source: DirtyWaterWatch estimates using U.S. Geological Survey river maps and flow measurements. The estimate stops at tidal water, the first lake or the distance limit.

The last 90 days

Last 90 days, hour by hour. Red: discharge or advisory reported. Amber: caution. Hatched amber: end not confirmed. Grey: no current status on the water outline. Purple hatching: source update overdue.
  • Discharge or advisory reported: to the latest update
    1 report: BRISTOL WATER RECLAMATION FAC. 1
    Show records

    The records are also in the report table on this page.

Source: DirtyWaterWatch calculations using the reports named above and the published status rules. Updated 2026-11-03 10:17 UTC.

Reported discharges over time

  • Discharges affecting the Pequabuck River in Connecticut, last 12 months11 affecting this stretch: 1 reported in Connecticut, none arriving from upstreamDecember 2025 to November 2026Verified reports where available, else notices; revisions and duplicates counted once. Arriving discharges are estimated from modeled downstream reaches.
  • Days with a discharge affecting the Pequabuck River in Connecticut, last 12 months1Reported on the Pequabuck River in Connecticut: 1 · Arriving from outfalls upstream, estimated: 0December 2025 to November 2026A day counts once however many discharges were under way on it. Verified reports where available, else notices; revisions and duplicates counted once.
  • Hours with a discharge or advisory status on the Pequabuck River in Connecticut, last 12 months18Reported on the Pequabuck River in Connecticut: 18 · Arriving from outfalls upstream, estimated: 0December 2025 to November 2026Red hours by the map's rules: each discharge to its reported end plus the state's post-discharge period; overlapping hours count once.
  • 2026 season with a discharge or advisory status on the Pequabuck River in Connecticut0.0%May to October 2026Share of May 1 to October 31 hours with red status by the map's rules, of the hours a source covered.
  • Records behind the last-90-days strip for the Pequabuck River in Connecticut1Reported on the Pequabuck River in Connecticut: 1 · Arriving from outfalls upstream, estimated: 0last 90 daysEvery distinct record the strip lists for its red, yellow and unresolved hours, notices and unresolved reports included; counted as the strip counts them.

Combined sewer overflow (CSO): sewage mixed with rainwater spills from a shared sewer system. Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater. Treatment bypass: wastewater skips one or more treatment steps. Blended discharge: wastewater that skipped some treatment is mixed with treated wastewater. Outfall: a pipe or outlet where wastewater enters a water body.

Reported discharges per month

4 reported discharges, January 2022 to November 2026.

  • Combined sewer overflow
  • Sanitary sewer overflow
  • Treatment bypass, blended or other

Connecticut dashboard records begin December 2, 2021; annual-report rows that repeat a dashboard record are counted once. Connecticut's Sewage Right-to-Know annual reports cover January 1, 2021 to November 3, 2026.

Sources: Connecticut Department of Energy and Environmental Protection sewage overflow dashboard; Connecticut Sewage Right-to-Know annual reports. Records cover January 1, 2022 to November 3, 2026.

Show table

Hours with a discharge or advisory status per month

Hours when this water had a discharge or advisory status under DirtyWaterWatch rules.

  • Discharge or advisory reported

2 discharge reports have no end time and are not marked ongoing; under DirtyWaterWatch rules they show caution, not a discharge or advisory status, and add no hours here. 1 discharge reported to last more than 31 days is counted as 31 days. Connecticut dashboard records begin December 2, 2021; annual-report rows that repeat a dashboard record are counted once. Connecticut's Sewage Right-to-Know annual reports cover January 1, 2021 to November 3, 2026. Connecticut's reporting archive runs from July 4, 2016 to December 2, 2021.

Sources: Connecticut Department of Energy and Environmental Protection sewage overflow dashboard; Connecticut Sewage Right-to-Know annual reports; Connecticut Department of Energy and Environmental Protection reporting archive, 2016 to 2021. Records cover July 4, 2016 to November 3, 2026.

Show table

Days with a reported discharge per month

A day counts when any counted discharge was under way on it, from its start to its reported end in Eastern Time; a report with no end counts its start day.

Sources: Connecticut Department of Energy and Environmental Protection sewage overflow dashboard; Connecticut Sewage Right-to-Know annual reports. Records cover January 1, 2022 to November 3, 2026.

Show table

Reported discharges per year, 2016 to 2026

26 reported discharges, 2016 to 2026.

  • Combined sewer overflow
  • Sanitary sewer overflow
  • Treatment bypass, blended or other
  • Incomplete source coverage

Connecticut dashboard records begin December 2, 2021; annual-report rows that repeat a dashboard record are counted once. Connecticut's Sewage Right-to-Know annual reports cover January 1, 2021 to November 3, 2026. Connecticut's reporting archive runs from July 4, 2016 to December 2, 2021.

Sources: Connecticut Department of Energy and Environmental Protection sewage overflow dashboard; Connecticut Sewage Right-to-Know annual reports; Connecticut Department of Energy and Environmental Protection reporting archive, 2016 to 2021. Records cover July 4, 2016 to November 3, 2026.

Show table

Reported volume per year

Gallons (axis: K thousand, M million), summed from the 6 reports that gave a volume as a number (20 did not).

  • Incomplete source coverage

20 of 26 discharge reports gave no volume as a number (15 gave a range); only numbers are summed. Connecticut's 2016 to 2021 archive gives volumes as ranges ("20,001 - 50,000 gallons"); they are not summed.

Sources: Connecticut Department of Energy and Environmental Protection sewage overflow dashboard; Connecticut Sewage Right-to-Know annual reports; Connecticut Department of Energy and Environmental Protection reporting archive, 2016 to 2021. Records cover July 4, 2016 to November 3, 2026.

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Hours with a discharge or advisory status per year

Hours with a discharge or advisory status each year under DirtyWaterWatch rules; 2026 to date.

  • Discharge or advisory reported
  • Incomplete source coverage

2 discharge reports have no end time and are not marked ongoing; under DirtyWaterWatch rules they show caution, not a discharge or advisory status, and add no hours here. 1 discharge reported to last more than 31 days is counted as 31 days.

Sources: Connecticut Department of Energy and Environmental Protection sewage overflow dashboard; Connecticut Sewage Right-to-Know annual reports; Connecticut Department of Energy and Environmental Protection reporting archive, 2016 to 2021. Records cover July 4, 2016 to November 3, 2026.

Show table

Share of the May to October season with a discharge or advisory status

Share of the hours from May 1 to October 31 with a discharge or advisory status under DirtyWaterWatch rules.

  • Discharge or advisory reported
  • Season with incomplete source coverage

Seasons with incomplete source coverage: 2016. The share is of the hours a source covered. 2 discharge reports have no end time and are not marked ongoing; under DirtyWaterWatch rules they show caution, not a discharge or advisory status, and add no hours here. 1 discharge reported to last more than 31 days is counted as 31 days.

Sources: Connecticut Department of Energy and Environmental Protection sewage overflow dashboard; Connecticut Sewage Right-to-Know annual reports; Connecticut Department of Energy and Environmental Protection reporting archive, 2016 to 2021. Records cover July 4, 2016 to November 3, 2026.

Show table

Reported discharges by calendar month, all years

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

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

Sources: Connecticut Department of Energy and Environmental Protection sewage overflow dashboard; Connecticut Sewage Right-to-Know annual reports; Connecticut Department of Energy and Environmental Protection reporting archive, 2016 to 2021. Records cover July 4, 2016 to November 3, 2026.

Show table

Reported discharges by wastewater outlet

Wastewater outlets with the most tracked discharge records: 10 of 17, all years. Counts depend on reporting coverage and do not measure legal compliance or harm.

Connecticut dashboard records begin December 2, 2021; annual-report rows that repeat a dashboard record are counted once. Connecticut's Sewage Right-to-Know annual reports cover January 1, 2021 to November 3, 2026. Connecticut's reporting archive runs from July 4, 2016 to December 2, 2021.

Sources: Connecticut Department of Energy and Environmental Protection sewage overflow dashboard; Connecticut Sewage Right-to-Know annual reports; Connecticut Department of Energy and Environmental Protection reporting archive, 2016 to 2021. Records cover July 4, 2016 to November 3, 2026.

Show table
How these charts are counted

We count each discharge once. Where a source publishes notices and confirmed reports, we use confirmed reports for an operator's month when available; otherwise we use notices. We combine revisions and exclude duplicate state reports copied by the U.S. Environmental Protection Agency (EPA). Monthly and yearly totals appear separately. Status hours follow this site's rules. Shaded gaps mean missing coverage, not zero discharges.

  • Connecticut Department of Energy and Environmental Protection sewage overflow dashboard: records from December 2, 2021 to the latest update
  • Connecticut Sewage Right-to-Know annual reports: records from January 1, 2021 to the latest update
  • Connecticut Department of Energy and Environmental Protection reporting archive, 2016 to 2021: records from July 4, 2016 to December 2, 2021

Reports linked to Pequabuck River

Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater. Treatment bypass: wastewater skips one or more treatment steps.

Reports linked to Pequabuck River, newest first
WhenReportStatus
BRISTOL WATER RECLAMATION FAC. · Sewer Main, 284 West St, Bristol, CT · SSO · 10 gallons report · notice · mapto Nov 9, 11:30 AM
to Feb 13 ’25, 8:00 AMBRISTOL WATER RECLAMATION FAC. · Sewer Main, 9 East St, Bristol, CT · SSO (earlier version) · volume in each report mapended
to Jan 31 ’25, 1:15 PMBRISTOL WATER RECLAMATION FAC. · Lateral - Private, 211 Park St, Bristol, CT · SSO (earlier version) · 21,000 gallons in all mapended
to 11:00 AMBRISTOL WATER RECLAMATION FAC. · Treatment Plant, 75 Battisto Rd, Bristol, CT · Bypass · 1,125 gallons report · notice · mapended
Bristol WPCA · Manhole, South Street · SSO · “Undetermined” report · notice · mapreported
to 11:15 AMPlymouth WPCF · Treatment Plant, Canal St · Bypass · “less than 5 gallons” report · notice · mapended
to 8:32 AMPlymouth WPCF · Treatment Plant, 35 Canal St · Bypass · “approximately 5-10 gallons” report · notice · mapended
to 10:30 AMPlymouth WPCF · Sewer Main, Main Street · SSO · “not known” report · notice · mapended
to 1:15 PMBristol WPCA · Manhole, 298 Todd Street · SSO · volume in each report mapended
to 1:00 PMBristol WPCA · Manhole, 126 South Street · SSO · “51 - 500 gallons” report · notice · mapended
to 2:05 PMPlymouth WPCF · Treatment Plant, 35 canal st · Bypass · 0 gallons report · notice · mapended
to 8:49 AMPlymouth WPCF · Treatment Plant, 35 Canal St · Bypass · “Undetermined” report · notice · mapended
to 8:25 AMPlymouth WPCF · Treatment Plant, canal st · Bypass · “51 - 500 gallons” report · notice · mapended
to Feb 26 ’19, 2:00 PMPlymouth WPCF · Treatment Plant, 35 Canal St · Bypass · “Undetermined” report · notice · mapended
Plymouth WPCF · Treatment Plant, Meridian Street · Bypass · “Undetermined” report · notice · mapreported
to Feb 26 ’19, 3:30 PMPlymouth WPCF · Treatment Plant, Meridian Street · Bypass · “Over 1,000,000 gallons” report · notice · mapended
to Dec 2 ’18, 12:00 AMPlymouth WPCF · Manhole, see comments · SSO · “51 - 500 gallons” report · notice · mapended
to 11:15 AMBristol WPCA · Basement, 126 South Street, Bristol Elks Club · SSO · volume in each report mapended

Sources: CT DEEP CSO/SSO Performance Dashboard (QScend), retrieved 2026-11-03 10:02 UTC; CT DEEP Sewage Right-to-Know annual report 2024, retrieved 2026-11-03 10:02 UTC; CT DEEP reporting archive 2016-2021, retrieved 2026-11-03 10:03 UTC. A report's record id and times show when you hover or focus its "report" link.

Download these reports as CSV

Showing the latest 25 records of 30 records.See them all with filters.

All reports in Connecticut by year: 2026 (1 here) · 2025 (6 here) · 2023 (1 here) · 2021 (3 here) · 2020 (1 here) · 2019 (8 here) · 2018 (5 here) · 2017 (5 here)

Wastewater outlets on this water

Outfall: a pipe or outlet where wastewater enters a water body.

No wastewater outlet in our records is linked to this water.

Sewer operators listed for this water: BRISTOL WATER RECLAMATION FAC., Plymouth WPCF.

Boat launches

No public boat launch is listed in our records for this water.

Nearby waters

Sources covering this water

30 records linked to this water. Updated .