Connecticut / Sewer operators /
West Haven
Sewer utility · Connecticut
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.
No outlet locations are in our records for this operator. Square boat markers mark boat launches listed by OpenBoatLaunch.
- Federal wastewater discharge permit (NPDES)
- not recorded
- Wastewater outlets
- None with locations in our records
- Waters listed as receiving wastewater
- not recorded
- Tracked waters
- New Haven Harbor, CT, Cove River, CT, old field creek, CT, West River, CT, Lake phipps, CT, Long Island Sound, CT, Oyster River, CT
- Discharge records counted
- 317 records · latest
- Total reported volume in these records
- 7,185,588 gallons across the 183 records that give a volume (134 without one)
These totals reflect the records we track. Missing volumes and gaps in reporting limit comparisons between operators.
Sources: EPA ECHO and the operator and state sources linked below. Counts use the discharge records on this page. Updated 2026-11-03 11:12 UTC.
Public notices and alerts
We do not list an alert service for this operator yet. Check its website.
Source: West Haven's public notice and alert pages and the state's notification records.
Report a missing notice or error
Wastewater outlets
Outfall: a pipe or outlet where wastewater enters a water body.
Reports and advisories
Treatment bypass: wastewater skips one or more treatment steps. Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater.
| When | Report | Status |
|---|---|---|
| New Haven Harbor · Treatment Plant, 2 Beach St, West Haven, CT · Bypass · “Flows still elevated above 22MGD” report · notice · map | reported | |
| to 1:30 PM | New Haven Harbor · Manhole, 976 Ocean Ave, West Haven, CT · SSO · 1.32 million gallons in all map | ended |
| to 1:30 PM | New Haven Harbor · Manhole, 976 Ocean Ave, West Haven, CT · SSO · 790,560 gallons report · notice · map | ended |
| to 1:30 PM | New Haven Harbor · Manhole, 30 Platt Ave, West Haven, CT · SSO · 87,840 gallons report · notice · map | ended |
| to 1:30 PM | New Haven Harbor · Manhole, Blohm St, West Haven, CT · SSO · 87,840 gallons report · notice · map | ended |
| to 5:30 PM | New Haven Harbor · Manhole, Painter Dr, West Haven, CT · SSO · 351,840 gallons report · notice · map | ended |
| to 10:30 PM | New Haven Harbor · Manhole, 17 Dawson Ave, West Haven, CT · SSO · 50 gallons report · notice · map | ended |
| to 10:30 PM | New Haven Harbor · Manhole, Ocean Ave, West Haven, CT · SSO · 3,000 gallons report · notice · map | ended |
| to 9:15 AM | Water not mapped · Treatment Plant, 2 Beach St, West Haven, CT · Bypass · 75 gallons report · notice | ended |
| to 10:00 AM | Cove River · Manhole, 20 Industry Dr, West Haven, CT · SSO · 10 gallons report · notice · map | ended |
| Water not mapped · Manhole, 39 Eileen Rd, West Haven, CT · SSO · 20 gallons report · notice | ended | |
| to 8:00 AM | Water not mapped · Manhole, 47 Contact Dr, West Haven, CT · SSO · 60 gallons report · notice | ended |
| to 10:30 AM | Water not mapped · Treatment Plant, 2 Beach St, West Haven, CT · Bypass · 75 gallons report · notice | ended |
| to 8:30 AM | Water not mapped · Treatment Plant, 2 Beach St, West Haven, CT · Bypass · 20 gallons report · notice | ended |
| to 11:30 AM | New Haven Harbor · Treatment Plant, 2 Beach St, West Haven, CT · Bypass · 1,350 gallons report · notice · map | ended |
| to 11:30 AM | New Haven Harbor · Treatment Plant, 2 Beach St, West Haven, CT · Bypass · 200 gallons report · notice · map | ended |
| to 2:00 PM | old field creek · Manhole, 98 Blohm St, West Haven, CT · SSO · 20 gallons report · notice · map | ended |
| to Dec 24 ’25, 7:00 AM | West River · Manhole, 4 Spring St, West Haven, CT · SSO (earlier version) · volume in each report map | ended |
| to Dec 24 ’25, 7:00 AM | West River · Manhole, 4 Spring St, West Haven, CT · SSO (earlier version) · 65 gallons report · notice · map | ended |
| West River · Manhole, 4 Spring St, West Haven, CT · SSO (earlier version) · “approx 30 to 50 gallons intermittently during peak flow times” report · notice · map | reported | |
| to Dec 24 ’25, 7:00 AM | West River · Manhole, 4 Spring St, West Haven, CT · SSO · 50 gallons report · notice · map | ended |
| to 11:00 AM | Cove River · Lateral - Private, 125 Coleman St, West Haven, CT · SSO (earlier version) · 155 gallons in all map | ended |
| to 11:00 AM | Cove River · Lateral - Private, 125 Coleman St, West Haven, CT · SSO (earlier version) · 55 gallons report · notice · map | ended |
| to 11:00 AM | Cove River · Lateral - Private, 125 Coleman St, West Haven, CT · SSO (earlier version) · 50 gallons report · notice · map | ended |
| to 11:00 AM | Cove River · Lateral - Private, 125 Coleman St, West Haven, CT · SSO · 50 gallons report · notice · map | ended |
| to 5:15 AM | old field creek · Manhole, 98 Blohm St, West Haven, CT · SSO (earlier version) · 300 gallons in all map | ended |
| to 5:15 AM | old field creek · Manhole, 98 Blohm St, West Haven, CT · SSO (earlier version) · 100 gallons report · notice · map | ended |
| to 5:15 AM | old field creek · Manhole, 98 Blohm St, West Haven, CT · SSO (earlier version) · 100 gallons report · notice · map | ended |
| to 5:15 AM | old field creek · Manhole, 98 Blohm St, West Haven, CT · SSO · 100 gallons report · notice · map | ended |
Sources: CT DEEP CSO/SSO Performance Dashboard (QScend), retrieved 2026-11-02 11:20 UTC; CT DEEP Sewage Right-to-Know annual report 2024, retrieved 2026-11-03 11:02 UTC. A report's record id and times show when you hover or focus its "report" link.
Showing the latest 25 records of 331 records.See them all with filters.
All reports in Connecticut by year: 2026 (16 from West Haven) · 2025 (23 from West Haven) · 2024 (12 from West Haven) · 2023 (17 from West Haven) · 2022 (22 from West Haven) · 2021 (63 from West Haven) · 2020 (28 from West Haven) · 2019 (25 from West Haven) · 2018 (66 from West Haven) · 2017 (56 from West Haven) · 2016 (3 from West Haven)
Other sewer operators on these waters
- New Haven Harbor, CT: Greater New Haven Water Pollution Control Authority (East Shore WPAF)
- West River, CT: Greater New Haven Water Pollution Control Authority (East Shore WPAF)
- Long Island Sound, CT: City of Bridgeport WPCA - East Side WPCF (Seaview Ave) and East Side combined sewers, City of Bridgeport WPCA - West Side WPCF (Bostwick Ave) and West Side combined sewers, City of Glen Cove WWTF, City of Norwalk WPCA (Norwalk WPCF) - NPDES permitted secondary-treatment bypass and Ann Street Siphon emergency overflow, Great Neck Water Pollution Control District, Greater New Haven Water Pollution Control Authority (East Shore WPAF), New York City Department of Environmental Protection (12 WRRF CSO permits), Stamford WPCA (Stamford WPCF), Town of Greenwich Grass Island WPCF, Town of Harrison POSS (Mamaroneck district), Village of Manorhaven POSS, Westchester County Mamaroneck Sanitary Sewer District (Mamaroneck WRRF), Westchester County New Rochelle Sanitary Sewer District (New Rochelle WRRF), Darien, Fairfield WPCF, City of New London WPCF, Milford - Housatonic Collection System, Waterford, North Haven WPCF, Branford, Milford - Beaverbrook Collection System, Town of Stratford WPCF, Town of Westport WPCF and pump stations
- Oyster River, CT: Milford - Housatonic WPCF
The last 90 days
- End not confirmed: to 1 report: New Haven Harbor 1
Show records
The records are also in the report table on this page.
- Caution: to 5 reports: New Haven Harbor 5
Show records
The records are also in the report table on this page.
- Treatment plant bypass, started Sep 13, 2026, 3:30 PM EDT
- Sanitary sewer overflow (SSO), started Sep 13, 2026, 9:30 AM EDT
- Sanitary sewer overflow (SSO), started Sep 13, 2026, 9:30 AM EDT
- Sanitary sewer overflow (SSO), started Sep 13, 2026, 9:30 AM EDT
- Sanitary sewer overflow (SSO), started Sep 13, 2026, 9:30 AM EDT
- Discharge or advisory reported: to 4 reports: New Haven Harbor 4
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 11:12 UTC.
Reported discharges over time
- Discharges reported by West Haven, last 12 months16December 2025 to November 2026Verified reports where available, else notices; revisions and duplicates counted once.
- Days with a discharge reported by West Haven, last 12 months36December 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 from West Haven's reports, last 12 months1,141December 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 (West Haven)7.1%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.
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
76 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
| Month | Combined sewer overflow | Sanitary sewer overflow | Treatment bypass, blended or other | Total | Counted from | Coverage |
|---|---|---|---|---|---|---|
| January 2022 | 0 | 2 | 0 | 2 | Source records | |
| February 2022 | 0 | 0 | 0 | 0 | ||
| March 2022 | 0 | 2 | 0 | 2 | Source records | |
| April 2022 | 0 | 0 | 2 | 2 | Source records | |
| May 2022 | 0 | 3 | 3 | 6 | Source records | |
| June 2022 | 0 | 1 | 0 | 1 | Source records | |
| July 2022 | 0 | 0 | 0 | 0 | ||
| August 2022 | 0 | 0 | 0 | 0 | ||
| September 2022 | 0 | 3 | 1 | 4 | Source records | |
| October 2022 | 0 | 2 | 0 | 2 | Source records | |
| November 2022 | 0 | 1 | 0 | 1 | Source records | |
| December 2022 | 0 | 1 | 1 | 2 | Source records | |
| January 2023 | 0 | 1 | 0 | 1 | Source records | |
| February 2023 | 0 | 0 | 0 | 0 | ||
| March 2023 | 0 | 7 | 0 | 7 | Source records | |
| April 2023 | 0 | 0 | 0 | 0 | ||
| May 2023 | 0 | 0 | 0 | 0 | ||
| June 2023 | 0 | 1 | 0 | 1 | Source records | |
| July 2023 | 0 | 1 | 0 | 1 | Source records | |
| August 2023 | 0 | 0 | 0 | 0 | ||
| September 2023 | 0 | 0 | 0 | 0 | ||
| October 2023 | 0 | 0 | 0 | 0 | ||
| November 2023 | 0 | 2 | 0 | 2 | Source records | |
| December 2023 | 0 | 4 | 1 | 5 | Source records | |
| January 2024 | 0 | 0 | 0 | 0 | ||
| February 2024 | 0 | 0 | 0 | 0 | ||
| March 2024 | 0 | 5 | 0 | 5 | Source records | |
| April 2024 | 0 | 0 | 0 | 0 | ||
| May 2024 | 0 | 0 | 0 | 0 | ||
| June 2024 | 0 | 1 | 0 | 1 | Source records | |
| July 2024 | 0 | 2 | 0 | 2 | Source records | |
| August 2024 | 0 | 1 | 0 | 1 | Source records | |
| September 2024 | 0 | 0 | 0 | 0 | ||
| October 2024 | 0 | 1 | 0 | 1 | Source records | |
| November 2024 | 0 | 2 | 0 | 2 | Source records | |
| December 2024 | 0 | 0 | 0 | 0 | ||
| January 2025 | 0 | 1 | 0 | 1 | Source records | |
| February 2025 | 0 | 0 | 0 | 0 | ||
| March 2025 | 0 | 2 | 0 | 2 | Source records | |
| April 2025 | 0 | 0 | 0 | 0 | ||
| May 2025 | 0 | 1 | 0 | 1 | Source records | |
| June 2025 | 0 | 0 | 0 | 0 | ||
| July 2025 | 0 | 0 | 0 | 0 | ||
| August 2025 | 0 | 1 | 0 | 1 | Source records | |
| September 2025 | 0 | 2 | 0 | 2 | Source records | |
| October 2025 | 0 | 0 | 0 | 0 | ||
| November 2025 | 0 | 2 | 0 | 2 | Source records | |
| December 2025 | 0 | 0 | 0 | 0 | ||
| January 2026 | 0 | 1 | 0 | 1 | Source records | |
| February 2026 | 0 | 0 | 1 | 1 | Source records | |
| March 2026 | 0 | 0 | 0 | 0 | ||
| April 2026 | 0 | 0 | 3 | 3 | Source records | |
| May 2026 | 0 | 2 | 0 | 2 | Source records | |
| June 2026 | 0 | 1 | 1 | 2 | Source records | |
| July 2026 | 0 | 2 | 0 | 2 | Source records | |
| August 2026 | 0 | 0 | 0 | 0 | ||
| September 2026 | 0 | 4 | 1 | 5 | Source records | |
| October 2026 | 0 | 0 | 0 | 0 | ||
| November 2026 | 0 | 0 | 0 | 0 |
Hours with a discharge or advisory status per month
Hours when a water had a discharge or advisory status from this sewer operator's reports, under DirtyWaterWatch rules.
- Discharge or advisory reported
22 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. 2 discharges reported to last more than 31 days are counted as 31 days. Official beach and cyanobacteria (harmful blue-green algae) advisories are counted on water pages only. 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
| Month | Hours with a discharge or advisory status | Hours from post-discharge periods | Hours in the month | Coverage |
|---|---|---|---|---|
| January 2022 | 98 | 98 | 744 | |
| February 2022 | 0 | 0 | 672 | |
| March 2022 | 65 | 65 | 744 | |
| April 2022 | 97 | 97 | 720 | |
| May 2022 | 200 | 200 | 744 | |
| June 2022 | 52 | 52 | 720 | |
| July 2022 | 0 | 0 | 744 | |
| August 2022 | 0 | 0 | 744 | |
| September 2022 | 106 | 106 | 720 | |
| October 2022 | 107 | 107 | 744 | |
| November 2022 | 49 | 49 | 720 | |
| December 2022 | 98 | 98 | 744 | |
| January 2023 | 49 | 49 | 744 | |
| February 2023 | 0 | 0 | 672 | |
| March 2023 | 91 | 91 | 744 | |
| April 2023 | 0 | 0 | 720 | |
| May 2023 | 0 | 0 | 744 | |
| June 2023 | 50 | 50 | 720 | |
| July 2023 | 49 | 49 | 744 | |
| August 2023 | 0 | 0 | 744 | |
| September 2023 | 0 | 0 | 720 | |
| October 2023 | 0 | 0 | 744 | |
| November 2023 | 107 | 107 | 720 | |
| December 2023 | 219 | 219 | 744 | |
| January 2024 | 0 | 0 | 744 | |
| February 2024 | 0 | 0 | 696 | |
| March 2024 | 177 | 177 | 744 | |
| April 2024 | 0 | 0 | 720 | |
| May 2024 | 0 | 0 | 744 | |
| June 2024 | 49 | 49 | 720 | |
| July 2024 | 49 | 49 | 744 | |
| August 2024 | 49 | 49 | 744 | |
| September 2024 | 0 | 0 | 720 | |
| October 2024 | 50 | 50 | 744 | |
| November 2024 | 49 | 49 | 720 | |
| December 2024 | 0 | 0 | 744 | |
| January 2025 | 54 | 54 | 744 | |
| February 2025 | 0 | 0 | 672 | |
| March 2025 | 49 | 49 | 744 | |
| April 2025 | 0 | 0 | 720 | |
| May 2025 | 12 | 12 | 744 | |
| June 2025 | 37 | 37 | 720 | |
| July 2025 | 0 | 0 | 744 | |
| August 2025 | 49 | 49 | 744 | |
| September 2025 | 98 | 98 | 720 | |
| October 2025 | 0 | 0 | 744 | |
| November 2025 | 185 | 185 | 720 | |
| December 2025 | 607 | 607 | 744 | |
| January 2026 | 48 | 48 | 744 | |
| February 2026 | 48 | 48 | 672 | |
| March 2026 | 0 | 0 | 744 | |
| April 2026 | 124 | 124 | 720 | |
| May 2026 | 49 | 49 | 744 | |
| June 2026 | 98 | 98 | 720 | |
| July 2026 | 111 | 111 | 744 | |
| August 2026 | 0 | 0 | 744 | |
| September 2026 | 56 | 56 | 720 | |
| October 2026 | 0 | 0 | 744 | |
| November 2026 | 0 | 0 | 55 |
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
| Month | Days with a reported discharge | Coverage |
|---|---|---|
| January 2022 | 2 | |
| February 2022 | 0 | |
| March 2022 | 2 | |
| April 2022 | 2 | |
| May 2022 | 5 | |
| June 2022 | 1 | |
| July 2022 | 0 | |
| August 2022 | 0 | |
| September 2022 | 3 | |
| October 2022 | 2 | |
| November 2022 | 1 | |
| December 2022 | 2 | |
| January 2023 | 1 | |
| February 2023 | 0 | |
| March 2023 | 3 | |
| April 2023 | 0 | |
| May 2023 | 0 | |
| June 2023 | 1 | |
| July 2023 | 1 | |
| August 2023 | 0 | |
| September 2023 | 0 | |
| October 2023 | 0 | |
| November 2023 | 2 | |
| December 2023 | 5 | |
| January 2024 | 0 | |
| February 2024 | 0 | |
| March 2024 | 4 | |
| April 2024 | 0 | |
| May 2024 | 0 | |
| June 2024 | 1 | |
| July 2024 | 1 | |
| August 2024 | 1 | |
| September 2024 | 0 | |
| October 2024 | 1 | |
| November 2024 | 2 | |
| December 2024 | 0 | |
| January 2025 | 1 | |
| February 2025 | 0 | |
| March 2025 | 1 | |
| April 2025 | 0 | |
| May 2025 | 1 | |
| June 2025 | 0 | |
| July 2025 | 0 | |
| August 2025 | 1 | |
| September 2025 | 2 | |
| October 2025 | 0 | |
| November 2025 | 7 | |
| December 2025 | 24 | |
| January 2026 | 1 | |
| February 2026 | 1 | |
| March 2026 | 0 | |
| April 2026 | 3 | |
| May 2026 | 2 | |
| June 2026 | 2 | |
| July 2026 | 2 | |
| August 2026 | 0 | |
| September 2026 | 1 | |
| October 2026 | 0 | |
| November 2026 | 0 |
Reported discharges per year, 2016 to 2026
317 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
| Year | Combined sewer overflow | Sanitary sewer overflow | Treatment bypass, blended or other | Total | Coverage |
|---|---|---|---|---|---|
| 2016 | 0 | 3 | 0 | 3 | Incomplete source coverage |
| 2017 | 0 | 52 | 4 | 56 | |
| 2018 | 0 | 66 | 0 | 66 | |
| 2019 | 0 | 25 | 0 | 25 | |
| 2020 | 0 | 28 | 0 | 28 | |
| 2021 | 0 | 58 | 5 | 63 | Incomplete source coverage |
| 2022 | 0 | 15 | 7 | 22 | |
| 2023 | 0 | 16 | 1 | 17 | |
| 2024 | 0 | 12 | 0 | 12 | |
| 2025 | 0 | 9 | 0 | 9 | |
| 2026 | 0 | 10 | 6 | 16 |
Reported volume per year
Gallons (axis: K thousand, M million), summed from the 183 reports that gave a volume as a number (134 did not).
- Incomplete source coverage
134 of 317 discharge reports gave no volume as a number (125 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 3, 2026.
Show table
| Year | Reported volume, gallons | Reports with a volume | Reports without a volume | Coverage |
|---|---|---|---|---|
| 2016 | 0 | 0 | 3 | Incomplete source coverage |
| 2017 | 22,241 | 39 | 17 | |
| 2018 | 133,195 | 35 | 31 | |
| 2019 | 775 | 5 | 20 | |
| 2020 | 5,060 | 7 | 21 | |
| 2021 | 1,062,390 | 29 | 34 | Incomplete source coverage |
| 2022 | 7,607 | 15 | 7 | |
| 2023 | 609,710 | 17 | 0 | |
| 2024 | 4,020,870 | 12 | 0 | |
| 2025 | 780 | 9 | 0 | |
| 2026 | 1,322,960 | 15 | 1 |
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
22 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. 2 discharges reported to last more than 31 days are counted as 31 days. Official beach and cyanobacteria (harmful blue-green algae) advisories are counted on water pages only.
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
| Year | Hours with a discharge or advisory status | Share of the year | Coverage |
|---|---|---|---|
| 2016 | 81 | 0.9% | Incomplete source coverage |
| 2017 | 1,327 | 15.1% | |
| 2018 | 2,403 | 27.4% | |
| 2019 | 1,408 | 16.1% | |
| 2020 | 933 | 10.6% | |
| 2021 | 947 | 10.8% | Incomplete source coverage |
| 2022 | 870 | 9.9% | |
| 2023 | 563 | 6.4% | |
| 2024 | 421 | 4.8% | |
| 2025 | 1,089 | 12.4% | |
| 2026 | 534 | 7.3% |
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
| Month | Reported discharges | Years of records |
|---|---|---|
| January | 34 | 10 |
| February | 31 | 10 |
| March | 36 | 10 |
| April | 25 | 10 |
| May | 13 | 10 |
| June | 19 | 10 |
| July | 30 | 11 |
| August | 18 | 11 |
| September | 44 | 11 |
| October | 13 | 11 |
| November | 22 | 11 |
| December | 32 | 10 |
Reported discharges by wastewater outlet
Wastewater outlets with the most tracked discharge records: 10 of 206, 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
| Wastewater outlet | Sewer operator | Reported discharges |
|---|---|---|
| Treatment Plant, 2 Beach St, West Haven, CT | WEST HAVEN | 14 |
| Manhole, beach street | West Haven | 8 |
| Pump Station, Blohm Street | West Haven | 7 |
| Manhole, 98 Blohm St, West Haven, CT | WEST HAVEN | 5 |
| Pump Station, Beatrice Drive | West Haven | 5 |
| Manhole, 104 Chestnut St, West Haven, CT | WEST HAVEN | 3 |
| Treatment Plant, Beach Street | West Haven | 3 |
| Pump Station, Front Avenue | West Haven | 3 |
| Pump Station, Dawson Avenue/Ocean Avenue | West Haven | 3 |
| Pump Station, Painter Drive | West Haven | 3 |
| Other outlets (196) | 263 |
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