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Connecticut / Waters /

Pequonnock River

River in Connecticut, past Bridgeport, Monroe and Trumbull

Current status

No current status shown

No current status is assigned to this water outline. Check the water page for reports and any estimated downstream stretches. Why this status, and its source

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.

Check City of Bridgeport WPCA - West Side WPCF (Bostwick Ave) and West Side combined sewers's notices · Bookmark this water page and check it before each trip · Report a missing notice or error

About this status

Why this status: No current status: no report we track sets a status on this water outline now.

How long each status lasts, and why

Sources checked: CT DEEP CSO/SSO Performance Dashboard (QScend) (last successful check 2026-11-02 21:17 UTC); CT DEEP Sewage Right-to-Know annual report 2024 (last successful check 2026-11-02 21:18 UTC); CT DEEP reporting archive 2016-2021 (last successful check 2026-11-02 21:18 UTC). Status by DirtyWaterWatch, updated 2026-11-02 21:26 UTC.

No status does not mean the water is safe. Follow posted signs and local health advice.

Updated .

Estimated downstream stretches on Pequonnock River

No downstream stretch has a current status here as of Nov 2, 2026, 4:26 PM EST. Check the reports below.

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.

No discharge, advisory or caution periods are shown for this water in this time span. Check downstream stretches and source coverage.

Source: DirtyWaterWatch calculations using the reports named above and the published status rules. Updated 2026-11-02 21:26 UTC.

Reported discharges over time

  • Discharges affecting the Pequonnock River in Connecticut, last 12 months00 affecting this stretch: 0 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 Pequonnock River in Connecticut, last 12 months0Reported on the Pequonnock River in Connecticut: 0 · 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 Pequonnock River in Connecticut, last 12 months0Reported on the Pequonnock River in Connecticut: 0 · 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 Pequonnock 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 Pequonnock River in Connecticut0Reported on the Pequonnock River in Connecticut: 0 · 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

581 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 2, 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 2, 2026.

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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

86 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. 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 2, 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 2, 2026.

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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 2, 2026.

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Reported discharges per year, 2016 to 2026

1,011 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 2, 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 2, 2026.

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Reported volume per year

Gallons (axis: K thousand, M million), summed from the 517 reports that gave a volume as a number (494 did not).

  • Incomplete source coverage

494 of 1,011 discharge reports gave no volume as a number (330 gave a range); only numbers are summed. Some volumes in Connecticut's annual reports are given as text or ranges and are not 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 2, 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

86 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.

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 2, 2026.

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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. 86 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.

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 2, 2026.

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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 2, 2026.

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Reported discharges by wastewater outlet

Wastewater outlets with the most tracked discharge records: 10 of 18, 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 2, 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 2, 2026.

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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 Pequonnock River

Reports linked to Pequonnock River, newest first
StartEnd Sewer operator OutletTypeVolumeSourceLinks
Dec 19, 2025, 10:00 AM EST Dec 19, 2025, 1:00 PM EST Bridgeport WPCA West Side 33 HUNT Combined sewer overflow (CSO)Duplicate 60,000 gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 10216, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Dec 19, 2025, 10:00 AM EST Dec 19, 2025, 1:00 PM EST Bridgeport WPCA West Side 207 STATE A&B Combined sewer overflow (CSO)Duplicate 170,000 gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 10215, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Dec 19, 2025, 10:00 AM EST Dec 19, 2025, 1:00 PM EST Bridgeport WPCA West Side 77 GRAND Combined sewer overflow (CSO)Duplicate 380,000 gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 10214, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Dec 19, 2025, 10:00 AM EST Dec 19, 2025, 1:00 PM EST Bridgeport WPCA West Side 76 HOUS Combined sewer overflow (CSO)Duplicate 370,000 gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 10213, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Dec 19, 2025, 10:00 AM EST Dec 19, 2025, 1:00 PM EST Bridgeport WPCA West Side 50 FAIR Combined sewer overflow (CSO)Duplicate 250,000 gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 10212, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Dec 19, 2025, 10:00 AM EST Dec 19, 2025, 1:00 PM EST Bridgeport WPCA West Side 49 WAL Combined sewer overflow (CSO)Duplicate 130,000 gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 10211, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Dec 19, 2025, 10:00 AM EST Dec 19, 2025, 1:00 PM EST Bridgeport WPCA West Side 48 47 TER N&S Combined sewer overflow (CSO)Duplicate 50,000 gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 10210, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Dec 2, 2025, 5:00 PM EST Dec 2, 2025, 6:00 PM EST Bridgeport WPCA West Side 77 GRAND Combined sewer overflow (CSO)Duplicate 80,000 gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 10176, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Dec 2, 2025, 5:00 PM EST Dec 2, 2025, 6:00 PM EST Bridgeport WPCA West Side 76 HOUS Combined sewer overflow (CSO)Duplicate 80,000 gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 10175, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Oct 30, 2025, 5:30 PM EDT Oct 31, 2025, 2:30 AM EDT Bridgeport WPCA West Side 195 OVER Combined sewer overflow (CSO)Duplicate 140,000 gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 10103, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Oct 30, 2025, 5:30 PM EDT Oct 31, 2025, 2:30 AM EDT Bridgeport WPCA West Side 33 HUNT Combined sewer overflow (CSO)Duplicate 2.31 million gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 10100, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Oct 30, 2025, 5:30 PM EDT Oct 31, 2025, 2:30 AM EDT Bridgeport WPCA West Side 79 EWAS Combined sewer overflow (CSO)Duplicate 520,000 gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 10099, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Oct 30, 2025, 5:30 PM EDT Oct 31, 2025, 2:30 AM EDT Bridgeport WPCA West Side 207 STATE A&B Combined sewer overflow (CSO)Duplicate 650,000 gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 10098, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Oct 30, 2025, 5:30 PM EDT Oct 31, 2025, 2:30 AM EDT Bridgeport WPCA West Side 77 GRAND Combined sewer overflow (CSO)Duplicate 1.57 million gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 10097, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Oct 30, 2025, 5:30 PM EDT Oct 31, 2025, 2:30 AM EDT Bridgeport WPCA West Side 76 HOUS Combined sewer overflow (CSO)Duplicate 2.3 million gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 10096, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Oct 30, 2025, 5:30 PM EDT Oct 31, 2025, 2:30 AM EDT Bridgeport WPCA West Side 50 FAIR Combined sewer overflow (CSO)Duplicate 1.67 million gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 10095, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Oct 30, 2025, 5:30 PM EDT Oct 31, 2025, 2:30 AM EDT Bridgeport WPCA West Side 49 WALL Combined sewer overflow (CSO)Duplicate 390,000 gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 10094, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Oct 30, 2025, 5:30 PM EDT Oct 31, 2025, 2:30 AM EDT Bridgeport WPCA West Side 48 47 TER N&S Combined sewer overflow (CSO)Duplicate 1.12 million gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 10093, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Oct 13, 2025, 2:00 AM EDT Oct 13, 2025, 3:00 AM EDT Bridgeport WPCA West Side 77 GRAND Combined sewer overflow (CSO)Duplicate 300,000 gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 10018, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Sep 6, 2025, 5:00 PM EDT Sep 6, 2025, 8:00 PM EDT Bridgeport WPCA West Side 33 HUNT Combined sewer overflow (CSO)Duplicate 1.17 million gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 9904, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Sep 6, 2025, 5:00 PM EDT Sep 6, 2025, 8:00 PM EDT Bridgeport WPCA West Side 79 EWAS Combined sewer overflow (CSO)Duplicate 690,000 gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 9903, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Sep 6, 2025, 5:00 PM EDT Sep 6, 2025, 8:00 PM EDT Bridgeport WPCA West Side 207 STATE A&B Combined sewer overflow (CSO)Duplicate 1.32 million gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 9901, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Sep 6, 2025, 5:00 PM EDT Sep 6, 2025, 8:00 PM EDT Bridgeport WPCA West Side 77 GRAND Combined sewer overflow (CSO)Duplicate 1.6 million gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 9900, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Sep 6, 2025, 5:00 PM EDT Sep 6, 2025, 8:00 PM EDT Bridgeport WPCA West Side 76 HOUS Combined sewer overflow (CSO)Duplicate 1.79 million gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 9899, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Sep 6, 2025, 5:00 PM EDT Sep 6, 2025, 8:00 PM EDT Bridgeport WPCA West Side 50 FAIR Combined sewer overflow (CSO)Duplicate 1.54 million gallons Bridgeport WPCA West Side (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 9898, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice
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Showing the latest 25 records of 1,082 records. See them all with filters.

All reports in Connecticut by year: 2025 (108 here) · 2024 (232 here) · 2023 (202 here) · 2022 (109 here) · 2021 (235 here) · 2020 (37 here) · 2019 (41 here) · 2018 (55 here) · 2017 (38 here) · 2016 (24 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: City of Bridgeport WPCA - West Side WPCF (Bostwick Ave) and West Side combined sewers.

Boat launches

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

Nearby waters

Sources covering this water

1,082 records linked to this water. Updated .