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New York / Waters /

Long Island Sound

Sound in New York, near Baiting Hollow, Bayville, Bronx, Brookhaven, Eatons Neck, Great Neck, New Rochelle, Northport, Northville, Orient, Orient Point and Oyster Bay

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

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.

Square boat markers mark boat launches listed by OpenBoatLaunch. Outlined boat markers are marinas and clubs: not public access. Larger round markers with a label mark beach and other official advisories nearby.

Get alerts from Westchester County Mamaroneck Sanitary Sewer District (Mamaroneck WRRF) · 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: NY DEC Sewage Pollution Right to Know (last successful check 2026-11-02 21:20 UTC); State Park beaches (last successful check 2026-11-02 21:20 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 .

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.

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 Long Island Sound in New York, last 12 months77 affecting this stretch: 7 reported in New York, 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 Long Island Sound in New York, last 12 months14Reported on the Long Island Sound in New York: 14 · 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 Long Island Sound in New York, last 12 months139Reported on the Long Island Sound in New York: 139 · 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 Long Island Sound in New York1.3%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 Long Island Sound in New York2Reported on the Long Island Sound in New York: 2 · 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.

This record covers the Long Island Sound within New York; the same water upstream is a separate record.

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

7 reported discharges, January 2022 to November 2026.

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

Source: ny-dec-sprtk. 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

Source: ny-dec-sprtk. Records cover August 11, 2021 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.

Source: ny-dec-sprtk. Records cover January 1, 2022 to November 2, 2026.

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Reported discharges per year, 2021 to 2026

7 reported discharges, 2021 to 2026.

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

Source: ny-dec-sprtk. Records cover August 11, 2021 to November 2, 2026.

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Reported volume per year

Gallons (axis: K thousand, M million), summed from the 7 reports that gave a volume as a number.

  • Incomplete source coverage
Limited records

Source: ny-dec-sprtk. Records cover August 11, 2021 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
Limited records

Source: ny-dec-sprtk. Records cover August 11, 2021 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: 2021. The share is of the hours a source covered.

Source: ny-dec-sprtk. Records cover August 11, 2021 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.

Source: ny-dec-sprtk. Records cover August 11, 2021 to November 2, 2026.

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Reported discharges by wastewater outlet

Wastewater outlets with the most tracked discharge records: 1 of 1, all years. Counts depend on reporting coverage and do not measure legal compliance or harm.

Source: ny-dec-sprtk. Records cover August 11, 2021 to November 2, 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.

  • ny-dec-sprtk: records from August 11, 2021 to the latest update

Reports linked to Long Island Sound

Reports linked to Long Island Sound, newest first
StartEnd Sewer operator OutletTypeVolumeSourceLinks
Aug 20, 2026, 8:20 PM EDT Aug 21, 2026, 1:55 AM EDT Mamaroneck (V) Sanitary SD MMWWTP Blended discharge 2.43 million gallons Mamaroneck (V) Sanitary SD (NY DEC Sewage Pollution Right to Know), record 2693770739019583, reported Aug 23, 2026, 1:01 PM EDT, retrieved 2026-11-02 20:40 UTC · Read the original notice
Aug 20, 2026, 8:20 PM EDT ongoing (as reported) Mamaroneck (V) Sanitary SD MMWWTP Blended dischargeEarlier version 5 million gallons Mamaroneck (V) Sanitary SD (NY DEC Sewage Pollution Right to Know), record 2700196010019300, reported Aug 20, 2026, 9:02 PM EDT, retrieved 2026-11-02 20:40 UTC · Read the original notice
Aug 3, 2026, 10:28 AM EDT Aug 3, 2026, 11:02 AM EDT Mamaroneck (V) Sanitary SD MMWWTP Blended discharge 16,290 gallons Mamaroneck (V) Sanitary SD (NY DEC Sewage Pollution Right to Know), record 2655390911303473, reported Aug 4, 2026, 7:52 AM EDT, retrieved 2026-11-02 20:40 UTC · Read the original notice
Aug 3, 2026, 10:28 AM EDT ongoing (as reported) Mamaroneck (V) Sanitary SD MMWWTP Blended dischargeEarlier version 4 million gallons Mamaroneck (V) Sanitary SD (NY DEC Sewage Pollution Right to Know), record 2652126736152650, reported Aug 3, 2026, 11:15 AM EDT, retrieved 2026-11-02 20:40 UTC · Read the original notice
Jul 21, 2026, 5:43 PM EDT Jul 22, 2026, 7:42 PM EDT Mamaroneck (V) Sanitary SD MMWWTP Blended discharge 536,240 gallons Mamaroneck (V) Sanitary SD (NY DEC Sewage Pollution Right to Know), record 2625772816968700, reported Jul 22, 2026, 11:30 AM EDT, retrieved 2026-11-02 20:40 UTC · Read the original notice
Jul 21, 2026, 5:43 PM EDT ongoing (as reported) Mamaroneck (V) Sanitary SD MMWWTP Blended dischargeEarlier version 5 million gallons Mamaroneck (V) Sanitary SD (NY DEC Sewage Pollution Right to Know), record 2623024037838438, reported Jul 21, 2026, 6:16 PM EDT, retrieved 2026-11-02 20:40 UTC · Read the original notice
Jul 18, 2026, 10:44 PM EDT Jul 19, 2026, 10:58 PM EDT Mamaroneck (V) Sanitary SD MMWWTP Blended discharge 6,090 gallons Mamaroneck (V) Sanitary SD (NY DEC Sewage Pollution Right to Know), record 2622920958563283, reported Jul 20, 2026, 10:46 AM EDT, retrieved 2026-11-02 20:40 UTC · Read the original notice
Jul 18, 2026, 10:44 PM EDT ongoing (as reported) Mamaroneck (V) Sanitary SD MMWWTP Blended dischargeEarlier version 50,000 gallons Mamaroneck (V) Sanitary SD (NY DEC Sewage Pollution Right to Know), record 2623024037763214, reported Jul 19, 2026, 12:05 AM EDT, retrieved 2026-11-02 20:40 UTC · Read the original notice
Mar 23, 2026, 9:09 AM EDT Mar 23, 2026, 12:21 PM EDT Mamaroneck (V) Sanitary SD MMWWTP Blended discharge 309,630 gallons Mamaroneck (V) Sanitary SD (NY DEC Sewage Pollution Right to Know), record 2426211456389378, reported Mar 24, 2026, 9:23 AM EDT, retrieved 2026-11-02 20:40 UTC · Read the original notice
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Mar 23, 2026, 9:09 AM EDT ongoing (as reported) Mamaroneck (V) Sanitary SD MMWWTP Blended dischargeEarlier version 5 million gallons Mamaroneck (V) Sanitary SD (NY DEC Sewage Pollution Right to Know), record 2434011117008048, reported Mar 23, 2026, 9:57 AM EDT, retrieved 2026-11-02 20:40 UTC · Read the original notice
Mar 16, 2026, 7:18 PM EDT Mar 17, 2026, 1:27 AM EDT Mamaroneck (V) Sanitary SD MMWWTP Blended discharge 1.52 million gallons Mamaroneck (V) Sanitary SD (NY DEC Sewage Pollution Right to Know), record 2426211456286276, reported Mar 18, 2026, 8:43 AM EDT, retrieved 2026-11-02 20:40 UTC · Read the original notice
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Mar 16, 2026, 7:18 PM EDT ongoing (as reported) Mamaroneck (V) Sanitary SD MMWWTP Blended dischargeEarlier version 10 million gallons Mamaroneck (V) Sanitary SD (NY DEC Sewage Pollution Right to Know), record 2431124898845876, reported Mar 16, 2026, 8:24 PM EDT, retrieved 2026-11-02 20:40 UTC · Read the original notice
Mar 5, 2026, 8:05 PM EST Mar 8, 2026, 10:30 PM EDT Mamaroneck (V) Sanitary SD MMWWTP Blended discharge 18.03 million gallons Mamaroneck (V) Sanitary SD (NY DEC Sewage Pollution Right to Know), record 2401712962805453, reported Mar 10, 2026, 9:24 AM EDT, retrieved 2026-11-02 20:40 UTC · Read the original notice
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Mar 5, 2026, 8:05 PM EST ongoing (as reported) Mamaroneck (V) Sanitary SD MMWWTP Blended dischargeEarlier version 2 million gallons Mamaroneck (V) Sanitary SD (NY DEC Sewage Pollution Right to Know), record 2386251080599589, reported Mar 5, 2026, 9:20 PM EST, retrieved 2026-11-02 20:40 UTC · Read the original notice
Jul 7, 2025 Jul 9, 2025 not stated Sunken Meadow SP-East Beach advisory volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record sunken-meadow-sp-east:long-island-sound:2025-07-07, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Aug 19, 2024 Aug 21, 2024 not stated Sunken Meadow SP Beach closure volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record sunken-meadow-sp:long-island-sound:2024-08-19, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Aug 19, 2024 Aug 21, 2024 not stated Sunken Meadow SP-East Beach closure volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record sunken-meadow-sp-east:long-island-sound:2024-08-19, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Aug 19, 2024 Aug 21, 2024 not stated Wildwood SP Beach closure volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record wildwood-sp:long-island-sound:2024-08-19, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Jul 22, 2024 Jul 25, 2024 not stated Sunken Meadow SP Beach closure volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record sunken-meadow-sp:long-island-sound:2024-07-22, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Jun 24, 2024 Jun 26, 2024 not stated Orient Beach SP Beach advisory volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record orient-beach-sp:long-island-sound:2024-06-24, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Jul 16, 2023 Jul 17, 2023 not stated Wildwood SP Beach closure volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record wildwood-sp:long-island-sound:2023-07-16, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Jul 10, 2023 Jul 11, 2023 not stated Wildwood SP Beach closure volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record wildwood-sp:long-island-sound:2023-07-10, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Jul 18, 2022 Jul 19, 2022 not stated Wildwood SP Beach closure volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record wildwood-sp:long-island-sound:2022-07-18, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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May 31, 2022 Jun 1, 2022 not stated Sunken Meadow SP-East Beach advisory volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record sunken-meadow-sp-east:long-island-sound:2022-05-31, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Sep 2, 2021 Sep 4, 2021 not stated Wildwood SP Beach closure volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record wildwood-sp:long-island-sound:2021-09-02, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Showing the latest 25 records of 46 records. See them all with filters.

All reports in New York by year: 2026 (14 here) · 2025 (1 here) · 2024 (5 here) · 2023 (2 here) · 2022 (2 here) · 2021 (3 here) · 2020 (3 here) · 2019 (2 here) · 2018 (3 here) · 2017 (9 here) · 2016 (1 here) · 2015 (1 here)

Beaches named in these records: Orient Beach SP, Sunken Meadow SP, Sunken Meadow SP-East, Wildwood SP.

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: Westchester County Mamaroneck Sanitary Sewer District (Mamaroneck WRRF).

Boat launches

Source: OpenBoatLaunch launch records (public agency data and OpenStreetMap, Open Database License). · Long Island Sound on OpenBoatLaunch

Marinas and clubs on this water

Marina or club: not public access.

Nearby waters

Sources covering this water

46 records linked to this water. Updated .