Connecticut / Waters /
Byram River
River in Connecticut, past Greenwich
Current status
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.
Conditions
At the Byram River at Pemberwick, CT gauge, on this water: flow 11.5 cubic feet per second (Nov 2, 2026, 3:30 PM EST).
Conditions are measured at the gauge, not at this spot, and do not change the status.
Source: U.S. Geological Survey via Water Data for the Nation, gauge 01212500, reading Nov 2, 2026, 3:30 PM EST, retrieved 2026-11-02 21:22 UTC. Gauge chosen by DirtyWaterWatch. · Readings and history at USGS
Check Town of Greenwich Grass Island WPCF'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 Byram 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
- Caution: to 1 report: Town of Greenwich Grass Island WPCF 1
Show records
The records are also in the report table on this page.
- Discharge or advisory reported: to 1 report: Town of Greenwich Grass Island WPCF 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 2026-11-02 21:26 UTC.
Reported discharges over time
- Discharges affecting the Byram 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 Byram River in Connecticut, last 12 months1Reported on the Byram 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 Byram River in Connecticut, last 12 months54Reported on the Byram River in Connecticut: 54 · 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 Byram River in Connecticut1.2%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 Byram River in Connecticut1Reported on the Byram 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
6 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.
Show table
| Month | Combined sewer overflow | Sanitary sewer overflow | Treatment bypass, blended or other | Total | Counted from | Coverage |
|---|---|---|---|---|---|---|
| January 2022 | 0 | 0 | 0 | 0 | ||
| February 2022 | 0 | 0 | 0 | 0 | ||
| March 2022 | 0 | 1 | 0 | 1 | Source records | |
| April 2022 | 0 | 0 | 0 | 0 | ||
| May 2022 | 0 | 0 | 0 | 0 | ||
| June 2022 | 0 | 0 | 0 | 0 | ||
| July 2022 | 0 | 0 | 0 | 0 | ||
| August 2022 | 0 | 0 | 0 | 0 | ||
| September 2022 | 0 | 0 | 0 | 0 | ||
| October 2022 | 0 | 0 | 0 | 0 | ||
| November 2022 | 0 | 0 | 0 | 0 | ||
| December 2022 | 0 | 0 | 0 | 0 | ||
| January 2023 | 0 | 0 | 0 | 0 | ||
| February 2023 | 0 | 0 | 0 | 0 | ||
| March 2023 | 0 | 0 | 0 | 0 | ||
| April 2023 | 0 | 0 | 0 | 0 | ||
| May 2023 | 0 | 0 | 0 | 0 | ||
| June 2023 | 0 | 0 | 0 | 0 | ||
| July 2023 | 0 | 0 | 0 | 0 | ||
| August 2023 | 0 | 0 | 0 | 0 | ||
| September 2023 | 0 | 3 | 0 | 3 | Source records | |
| October 2023 | 0 | 0 | 0 | 0 | ||
| November 2023 | 0 | 0 | 0 | 0 | ||
| December 2023 | 0 | 0 | 0 | 0 | ||
| January 2024 | 0 | 0 | 0 | 0 | ||
| February 2024 | 0 | 0 | 0 | 0 | ||
| March 2024 | 0 | 0 | 0 | 0 | ||
| April 2024 | 0 | 0 | 0 | 0 | ||
| May 2024 | 0 | 0 | 0 | 0 | ||
| June 2024 | 0 | 0 | 0 | 0 | ||
| July 2024 | 0 | 0 | 0 | 0 | ||
| August 2024 | 0 | 0 | 0 | 0 | ||
| September 2024 | 0 | 0 | 0 | 0 | ||
| October 2024 | 0 | 0 | 0 | 0 | ||
| November 2024 | 0 | 0 | 0 | 0 | ||
| December 2024 | 0 | 0 | 0 | 0 | ||
| January 2025 | 0 | 0 | 0 | 0 | ||
| February 2025 | 0 | 0 | 0 | 0 | ||
| March 2025 | 0 | 0 | 0 | 0 | ||
| 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 | 0 | 0 | 0 | ||
| September 2025 | 0 | 0 | 0 | 0 | ||
| October 2025 | 0 | 0 | 0 | 0 | ||
| November 2025 | 0 | 0 | 0 | 0 | ||
| December 2025 | 0 | 0 | 0 | 0 | ||
| January 2026 | 0 | 0 | 0 | 0 | ||
| February 2026 | 0 | 0 | 0 | 0 | ||
| March 2026 | 0 | 0 | 0 | 0 | ||
| April 2026 | 0 | 0 | 0 | 0 | ||
| May 2026 | 0 | 0 | 0 | 0 | ||
| June 2026 | 0 | 0 | 0 | 0 | ||
| July 2026 | 0 | 0 | 0 | 0 | ||
| August 2026 | 0 | 0 | 0 | 0 | ||
| September 2026 | 0 | 1 | 0 | 1 | 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 this water had a discharge or advisory status under DirtyWaterWatch rules.
- Discharge or advisory reported
5 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.
Show table
| Month | Hours with a discharge or advisory status | Hours from post-discharge periods | Hours in the month | Coverage |
|---|---|---|---|---|
| January 2022 | 0 | 0 | 744 | |
| February 2022 | 0 | 0 | 672 | |
| March 2022 | 54 | 54 | 744 | |
| April 2022 | 0 | 0 | 720 | |
| May 2022 | 0 | 0 | 744 | |
| June 2022 | 0 | 0 | 720 | |
| July 2022 | 0 | 0 | 744 | |
| August 2022 | 0 | 0 | 744 | |
| September 2022 | 0 | 0 | 720 | |
| October 2022 | 0 | 0 | 744 | |
| November 2022 | 0 | 0 | 720 | |
| December 2022 | 0 | 0 | 744 | |
| January 2023 | 0 | 0 | 744 | |
| February 2023 | 0 | 0 | 672 | |
| March 2023 | 0 | 0 | 744 | |
| April 2023 | 0 | 0 | 720 | |
| May 2023 | 0 | 0 | 744 | |
| June 2023 | 0 | 0 | 720 | |
| July 2023 | 0 | 0 | 744 | |
| August 2023 | 0 | 0 | 744 | |
| September 2023 | 37 | 37 | 720 | |
| October 2023 | 40 | 40 | 744 | |
| November 2023 | 0 | 0 | 720 | |
| December 2023 | 0 | 0 | 744 | |
| January 2024 | 0 | 0 | 744 | |
| February 2024 | 0 | 0 | 696 | |
| March 2024 | 0 | 0 | 744 | |
| April 2024 | 0 | 0 | 720 | |
| May 2024 | 0 | 0 | 744 | |
| June 2024 | 0 | 0 | 720 | |
| July 2024 | 0 | 0 | 744 | |
| August 2024 | 0 | 0 | 744 | |
| September 2024 | 0 | 0 | 720 | |
| October 2024 | 0 | 0 | 744 | |
| November 2024 | 0 | 0 | 720 | |
| December 2024 | 0 | 0 | 744 | |
| January 2025 | 0 | 0 | 744 | |
| February 2025 | 0 | 0 | 672 | |
| March 2025 | 0 | 0 | 744 | |
| April 2025 | 0 | 0 | 720 | |
| May 2025 | 49 | 49 | 744 | |
| June 2025 | 0 | 0 | 720 | |
| July 2025 | 0 | 0 | 744 | |
| August 2025 | 0 | 0 | 744 | |
| September 2025 | 0 | 0 | 720 | |
| October 2025 | 0 | 0 | 744 | |
| November 2025 | 0 | 0 | 720 | |
| December 2025 | 0 | 0 | 744 | |
| January 2026 | 0 | 0 | 744 | |
| February 2026 | 0 | 0 | 672 | |
| March 2026 | 0 | 0 | 744 | |
| April 2026 | 0 | 0 | 720 | |
| May 2026 | 0 | 0 | 744 | |
| June 2026 | 0 | 0 | 720 | |
| July 2026 | 0 | 0 | 744 | |
| August 2026 | 0 | 0 | 744 | |
| September 2026 | 54 | 54 | 720 | |
| October 2026 | 0 | 0 | 744 | |
| November 2026 | 0 | 0 | 42 |
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.
Show table
| Month | Days with a reported discharge | Coverage |
|---|---|---|
| January 2022 | 0 | |
| February 2022 | 0 | |
| March 2022 | 1 | |
| April 2022 | 0 | |
| May 2022 | 0 | |
| June 2022 | 0 | |
| July 2022 | 0 | |
| August 2022 | 0 | |
| September 2022 | 0 | |
| October 2022 | 0 | |
| November 2022 | 0 | |
| December 2022 | 0 | |
| January 2023 | 0 | |
| February 2023 | 0 | |
| March 2023 | 0 | |
| April 2023 | 0 | |
| May 2023 | 0 | |
| June 2023 | 0 | |
| July 2023 | 0 | |
| August 2023 | 0 | |
| September 2023 | 2 | |
| October 2023 | 0 | |
| November 2023 | 0 | |
| December 2023 | 0 | |
| January 2024 | 0 | |
| February 2024 | 0 | |
| March 2024 | 0 | |
| April 2024 | 0 | |
| May 2024 | 0 | |
| June 2024 | 0 | |
| July 2024 | 0 | |
| August 2024 | 0 | |
| September 2024 | 0 | |
| October 2024 | 0 | |
| November 2024 | 0 | |
| December 2024 | 0 | |
| January 2025 | 0 | |
| February 2025 | 0 | |
| March 2025 | 0 | |
| April 2025 | 0 | |
| May 2025 | 1 | |
| June 2025 | 0 | |
| July 2025 | 0 | |
| August 2025 | 0 | |
| September 2025 | 0 | |
| October 2025 | 0 | |
| November 2025 | 0 | |
| December 2025 | 0 | |
| January 2026 | 0 | |
| February 2026 | 0 | |
| March 2026 | 0 | |
| April 2026 | 0 | |
| May 2026 | 0 | |
| June 2026 | 0 | |
| July 2026 | 0 | |
| August 2026 | 0 | |
| September 2026 | 1 | |
| October 2026 | 0 | |
| November 2026 | 0 |
Reported discharges per year, 2016 to 2026
22 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.
Show table
| Year | Combined sewer overflow | Sanitary sewer overflow | Treatment bypass, blended or other | Total | Coverage |
|---|---|---|---|---|---|
| 2016 | 0 | 0 | 0 | 0 | Incomplete source coverage |
| 2017 | 0 | 0 | 0 | 0 | |
| 2018 | 0 | 0 | 0 | 0 | |
| 2019 | 0 | 0 | 0 | 0 | |
| 2020 | 0 | 0 | 0 | 0 | |
| 2021 | 0 | 16 | 0 | 16 | Incomplete source coverage |
| 2022 | 0 | 1 | 0 | 1 | |
| 2023 | 0 | 3 | 0 | 3 | |
| 2024 | 0 | 0 | 0 | 0 | |
| 2025 | 0 | 1 | 0 | 1 | |
| 2026 | 0 | 1 | 0 | 1 |
Reported volume per year
Gallons (axis: K thousand, M million), summed from the 9 reports that gave a volume as a number (13 did not).
- Incomplete source coverage
13 of 22 discharge reports gave no volume as a number; only numbers are 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.
Show table
| Year | Reported volume, gallons | Reports with a volume | Reports without a volume | Coverage |
|---|---|---|---|---|
| 2016 | 0 | 0 | 0 | Incomplete source coverage |
| 2017 | 0 | 0 | 0 | |
| 2018 | 0 | 0 | 0 | |
| 2019 | 0 | 0 | 0 | |
| 2020 | 0 | 0 | 0 | |
| 2021 | 1,350 | 5 | 11 | Incomplete source coverage |
| 2022 | 23,000 | 1 | 0 | |
| 2023 | 9,000 | 3 | 0 | |
| 2024 | 0 | 0 | 0 | |
| 2025 | 0 | 0 | 1 | |
| 2026 | 0 | 0 | 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
5 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.
Show table
| Year | Hours with a discharge or advisory status | Share of the year | Coverage |
|---|---|---|---|
| 2016 | 0 | 0.0% | Incomplete source coverage |
| 2017 | 0 | 0.0% | |
| 2018 | 0 | 0.0% | |
| 2019 | 0 | 0.0% | |
| 2020 | 0 | 0.0% | |
| 2021 | 120 | 1.4% | Incomplete source coverage |
| 2022 | 54 | 0.6% | |
| 2023 | 77 | 0.9% | |
| 2024 | 0 | 0.0% | |
| 2025 | 49 | 0.6% | |
| 2026 | 54 | 0.7% |
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.
Show table
| Month | Reported discharges | Years of records |
|---|---|---|
| January | 0 | 10 |
| February | 0 | 10 |
| March | 1 | 10 |
| April | 0 | 10 |
| May | 1 | 10 |
| June | 0 | 10 |
| July | 13 | 11 |
| August | 0 | 11 |
| September | 7 | 11 |
| October | 0 | 11 |
| November | 0 | 11 |
| December | 0 | 10 |
Reported discharges by wastewater outlet
Wastewater outlets with the most tracked discharge records: 10 of 11, 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.
Show table
| Wastewater outlet | Sewer operator | Reported discharges |
|---|---|---|
| Manhole, 179 South Water Street | Greenwich - Grass Island WPCF | 4 |
| Manhole, 169 South Water Street (for MH#s 2496 & 4716) and 88 South Water Street (for MH#s 5137 & 5138) | Greenwich - Grass Island WPCF | 3 |
| Manhole, 184 South Water Street | Greenwich - Grass Island WPCF | 3 |
| Manhole, 111 South Water Street to 77 South Water Street | Greenwich - Grass Island WPCF | 3 |
| Manhole, 184 and 163 South Water Street | Greenwich - Grass Island WPCF | 3 |
| Manhole, 16 N Water St, Greenwich, CT | GREENWICH (GRASS ISLAND WPCF) | 1 |
| Manhole, 59 S Water St, Greenwich, CT | GREENWICH (GRASS ISLAND WPCF) | 1 |
| Manhole, 163 Hervey St, Greenwich, CT | GREENWICH (GRASS ISLAND WPCF) | 1 |
| Manhole, 60 S Water St, Greenwich, CT | GREENWICH (GRASS ISLAND WPCF) | 1 |
| Manhole, S Water St, Greenwich, CT | GREENWICH (GRASS ISLAND WPCF) | 1 |
| Other outlets (1) | 1 |
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 Byram River
| Start | End | Sewer operator | Outlet | Type | Volume | Source | Links |
|---|---|---|---|---|---|---|---|
| Sep 13, 2026, 9:30 AM EDT | Sep 13, 2026, 3:00 PM EDT | GREENWICH (GRASS ISLAND WPCF) | Manhole, S Water St, Greenwich, CT | Sanitary sewer overflow (SSO) | “Approximately 15 gallons per minute per manhole structure (estimated). Based on this we estimated a total of approximately 29,700 gallons that may have discharged to the surface.” | GREENWICH (GRASS ISLAND WPCF) (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 11469, the source gives no report time, retrieved 2026-11-02 11:20 UTC · Read the original notice | Read report: Sanitary sewer overflow (SSO), GREENWICH (GRASS ISLAND WPCF), Sep 13, 2026, 9:30 AM EDT · Map |
| May 1, 2025, 1:15 PM EDT | May 1, 2025, 2:00 PM EDT | GREENWICH (GRASS ISLAND WPCF) | Manhole, 21 Byram Rd, Greenwich, CT | Sanitary sewer overflow (SSO)Duplicate | 3,000 gallons | GREENWICH (GRASS ISLAND WPCF) (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 9448-2, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
| May 1, 2025, 1:15 PM EDT | May 1, 2025, 2:00 PM EDT | GREENWICH (GRASS ISLAND WPCF) | Manhole, 21 Byram Rd, Greenwich, CT | Sanitary sewer overflow (SSO)Duplicate | volume not reported | GREENWICH (GRASS ISLAND WPCF) (CT DEEP Sewage Right-to-Know annual report 2026) via CT DEEP Sewage Right-to-Know annual report 2024, record 9448, published Feb 25, 2026, 4:08 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
| May 1, 2025, 1:15 PM EDT | May 1, 2025, 2:00 PM EDT | GREENWICH (GRASS ISLAND WPCF) | Manhole, 21 Byram Rd, Greenwich, CT | Sanitary sewer overflow (SSO) | volume not reported | GREENWICH (GRASS ISLAND WPCF) (CT DEEP Performance Dashboard) via CT DEEP CSO/SSO Performance Dashboard (QScend), record 9448, the source gives no report time, retrieved 2026-11-02 11:20 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
| Sep 29, 2023, 11:00 AM EDT | Sep 30, 2023, 7:30 AM EDT | GREENWICH (GRASS ISLAND WPCF) | Manhole, 16 N Water St, Greenwich, CT | Sanitary sewer overflow (SSO) | 3,000 gallons | GREENWICH (GRASS ISLAND WPCF) (CT DEEP Sewage Right-to-Know annual report 2024), record x58cc273dad1b, published Jan 9, 2025, 2:55 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
| Sep 29, 2023, 11:00 AM EDT | Sep 30, 2023, 11:00 AM EDT | GREENWICH (GRASS ISLAND WPCF) | Manhole, 59 S Water St, Greenwich, CT | Sanitary sewer overflow (SSO) | 3,000 gallons | GREENWICH (GRASS ISLAND WPCF) (CT DEEP Sewage Right-to-Know annual report 2024), record x4174de4bbac1, published Jan 9, 2025, 2:55 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
| Sep 29, 2023, 11:00 AM EDT | Sep 30, 2023, 4:00 PM EDT | GREENWICH (GRASS ISLAND WPCF) | Manhole, 163 Hervey St, Greenwich, CT | Sanitary sewer overflow (SSO) | 3,000 gallons | GREENWICH (GRASS ISLAND WPCF) (CT DEEP Sewage Right-to-Know annual report 2024), record x3cdff16f4d58, published Jan 9, 2025, 2:55 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
| Mar 10, 2022, 10:30 AM EST | Mar 10, 2022, 4:15 PM EST | GREENWICH (GRASS ISLAND WPCF) | Manhole, 60 S Water St, Greenwich, CT | Sanitary sewer overflow (SSO) | 23,000 gallons | GREENWICH (GRASS ISLAND WPCF) (CT DEEP Sewage Right-to-Know annual report 2023) via CT DEEP Sewage Right-to-Know annual report 2024, record x995144a5b37c, published Jan 9, 2025, 2:54 PM EST, retrieved 2026-11-02 21:17 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
| Sep 2, 2021, 8:30 AM EDT | Sep 2, 2021, 9:00 PM EDT | Greenwich - Grass Island WPCF | Manhole, 169 South Water Street (for MH#s 2496 & 4716) and 88 South Water Street (for MH#s 5137 & 5138) | Sanitary sewer overflow (SSO) | 150 gallons | Greenwich - Grass Island WPCF (CT DEEP Sewage Right-to-Know annual report 2022) via CT DEEP Sewage Right-to-Know annual report 2024, record x042cc191ac46, published Oct 9, 2024, 12:47 PM EDT, retrieved 2026-11-02 21:17 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
| Sep 2, 2021, 8:30 AM EDT | Sep 2, 2021, 9:00 PM EDT | Greenwich - Grass Island WPCF | Manhole, 169 South Water Street (for MH#s 2496 & 4716) and 88 South Water Street (for MH#s 5137 & 5138) | Sanitary sewer overflow (SSO) | “Undetermined” | Greenwich - Grass Island WPCF (CT DEEP reporting archive 2016-2021), record bypass-35963279, reported Sep 2, 2021, 9:57 AM EDT, retrieved 2026-11-02 21:18 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
| Sep 2, 2021, 8:30 AM EDT | end not reported | Greenwich - Grass Island WPCF | Manhole, 169 South Water Street (for MH#s 2496 & 4716) and 88 South Water Street (for MH#s 5137 & 5138) | Sanitary sewer overflow (SSO) | “Undetermined” | Greenwich - Grass Island WPCF (CT DEEP reporting archive 2016-2021), record bypass-35963278, reported Sep 2, 2021, 9:57 AM EDT, retrieved 2026-11-02 21:18 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
| Jul 9, 2021, 10:45 AM EDT | Jul 9, 2021, 8:20 PM EDT | Greenwich - Grass Island WPCF | Manhole, 184 South Water Street | Sanitary sewer overflow (SSO) | 300 gallons | Greenwich - Grass Island WPCF (CT DEEP Sewage Right-to-Know annual report 2022) via CT DEEP Sewage Right-to-Know annual report 2024, record x62d6a1f48584, published Oct 9, 2024, 12:47 PM EDT, retrieved 2026-11-02 21:17 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
| Jul 9, 2021, 10:45 AM EDT | Jul 9, 2021, 8:20 PM EDT | Greenwich - Grass Island WPCF | Manhole, 111 South Water Street to 77 South Water Street | Sanitary sewer overflow (SSO) | 300 gallons | Greenwich - Grass Island WPCF (CT DEEP Sewage Right-to-Know annual report 2022) via CT DEEP Sewage Right-to-Know annual report 2024, record x224155d0fdfe, published Oct 9, 2024, 12:47 PM EDT, retrieved 2026-11-02 21:17 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
| Jul 9, 2021, 10:45 AM EDT | Jul 9, 2021, 8:20 PM EDT | Greenwich - Grass Island WPCF | Manhole, 111 South Water Street to 77 South Water Street | Sanitary sewer overflow (SSO) | “Undetermined” | Greenwich - Grass Island WPCF (CT DEEP reporting archive 2016-2021), record bypass-35963816, reported Jul 9, 2021, 2:35 PM EDT, retrieved 2026-11-02 21:18 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
| Jul 9, 2021, 10:45 AM EDT | end not reported | Greenwich - Grass Island WPCF | Manhole, 111 South Water Street to 77 South Water Street | Sanitary sewer overflow (SSO) | “Undetermined” | Greenwich - Grass Island WPCF (CT DEEP reporting archive 2016-2021), record bypass-35963815, reported Jul 9, 2021, 2:35 PM EDT, retrieved 2026-11-02 21:18 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
| Jul 9, 2021, 10:45 AM EDT | Jul 9, 2021, 8:20 PM EDT | Greenwich - Grass Island WPCF | Manhole, 184 South Water Street | Sanitary sewer overflow (SSO) | “Undetermined” | Greenwich - Grass Island WPCF (CT DEEP reporting archive 2016-2021), record bypass-35963225, reported Jul 9, 2021, 2:50 PM EDT, retrieved 2026-11-02 21:18 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
| Jul 9, 2021, 10:45 AM EDT | end not reported | Greenwich - Grass Island WPCF | Manhole, 184 South Water Street | Sanitary sewer overflow (SSO) | “Undetermined” | Greenwich - Grass Island WPCF (CT DEEP reporting archive 2016-2021), record bypass-35963224, reported Jul 9, 2021, 2:50 PM EDT, retrieved 2026-11-02 21:18 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
| Jul 9, 2021, 10:36 AM EDT | Jul 9, 2021, 8:20 PM EDT | Greenwich - Grass Island WPCF | Manhole, 179 South Water Street | Sanitary sewer overflow (SSO) | 300 gallons | Greenwich - Grass Island WPCF (CT DEEP Sewage Right-to-Know annual report 2022) via CT DEEP Sewage Right-to-Know annual report 2024, record xf154a360a6be, published Oct 9, 2024, 12:47 PM EDT, retrieved 2026-11-02 21:17 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
| Jul 9, 2021, 10:36 AM EDT | Jul 9, 2021, 8:20 PM EDT | Greenwich - Grass Island WPCF | Manhole, 179 South Water Street | Sanitary sewer overflow (SSO) | “Undetermined” | Greenwich - Grass Island WPCF (CT DEEP reporting archive 2016-2021), record bypass-35963821, reported Jul 9, 2021, 11:50 AM EDT, retrieved 2026-11-02 21:18 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
| Jul 9, 2021, 10:36 AM EDT | Jul 9, 2021, 8:15 PM EDT | Greenwich - Grass Island WPCF | Manhole, 179 South Water Street | Sanitary sewer overflow (SSO) | “Undetermined” | Greenwich - Grass Island WPCF (CT DEEP reporting archive 2016-2021), record bypass-35963820, reported Jul 9, 2021, 11:50 AM EDT, retrieved 2026-11-02 21:18 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
| Jul 9, 2021, 10:36 AM EDT | end not reported | Greenwich - Grass Island WPCF | Manhole, 179 South Water Street | Sanitary sewer overflow (SSO) | “Undetermined” | Greenwich - Grass Island WPCF (CT DEEP reporting archive 2016-2021), record bypass-35963819, reported Jul 9, 2021, 11:50 AM EDT, retrieved 2026-11-02 21:18 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
| Jul 9, 2021, 8:52 AM EDT | Jul 9, 2021, 8:20 PM EDT | Greenwich - Grass Island WPCF | Manhole, 184 and 163 South Water Street | Sanitary sewer overflow (SSO) | 300 gallons | Greenwich - Grass Island WPCF (CT DEEP Sewage Right-to-Know annual report 2022) via CT DEEP Sewage Right-to-Know annual report 2024, record xb3a4b07036f9, published Oct 9, 2024, 12:47 PM EDT, retrieved 2026-11-02 21:17 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
| Jul 9, 2021, 8:52 AM EDT | Jul 9, 2021, 8:20 PM EDT | Greenwich - Grass Island WPCF | Manhole, 184 and 163 South Water Street | Sanitary sewer overflow (SSO) | “Undetermined” | Greenwich - Grass Island WPCF (CT DEEP reporting archive 2016-2021), record bypass-35963818, reported Jul 9, 2021, 9:21 AM EDT, retrieved 2026-11-02 21:18 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
| Jul 9, 2021, 8:52 AM EDT | end not reported | Greenwich - Grass Island WPCF | Manhole, 184 and 163 South Water Street | Sanitary sewer overflow (SSO) | “Undetermined” | Greenwich - Grass Island WPCF (CT DEEP reporting archive 2016-2021), record bypass-35963817, reported Jul 9, 2021, 9:21 AM EDT, retrieved 2026-11-02 21:18 UTC · Read the original notice | Open record below · Map |
Read the full record | |||||||
All reports in Connecticut by year: 2026 (1 here) · 2025 (3 here) · 2023 (3 here) · 2022 (1 here) · 2021 (16 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: Town of Greenwich Grass Island WPCF.
Boat launches
No public boat launch is listed in our records for this water.
Nearby waters
- Greenwich Harbor, CT No current status shown about 6 km away
- Stamford Harbor, CT No current status shown about 12 km away
- Bronx River, NY No current status shown about 14 km away
- Cove Harbor, CT No current status shown about 16 km away
- Tappan Zee, NY No current status shown about 19 km away
Sources covering this water
- CT DEEP CSO/SSO Performance Dashboard (QScend) · Latest check succeeded · Last successful check: 2026-11-02 21:17 UTC
- CT DEEP Sewage Right-to-Know annual report 2024 · Latest check succeeded · Last successful check: 2026-11-02 21:18 UTC
- CT DEEP reporting archive 2016-2021 · Latest check succeeded · Last successful check: 2026-11-02 21:18 UTC
24 records linked to this water. Updated .