Chautauqua Lake

Lake in New York, near Ashville, Bemus Point, Celoron, Chautauqua, Cottage Park, Lakeside Park and Mayville

No current status shownSource update overdue

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. Larger round markers with a label mark beach and other official advisories nearby.

Conditions

At the Chautauqua Lake at Bemus Point NY gauge, 50 metres from the nearest boat launch on this water: no reading in the last 12 hours.

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 03013946, no reading in the last 12 hours, retrieval time not recorded. Gauge chosen by DirtyWaterWatch. · Readings and history at USGS

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: NYHABS (last successful check 2026-11-02 20:38 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.

Source update overdue since Nov 2, 2026, 3:38 PM EST: we have not received the expected update from NYHABS. Recent reports may be missing.

Updated Nov 2, 2026, 4:26 PM EST.

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.

A source update was overdue from Nov 2, 2026, 3:00 PM EST to the latest update.

Reported discharges over time

Historical charts are not available here. See the reports and sources on this page.

Reports linked to Chautauqua Lake

Reports linked to Chautauqua Lake, newest first
Start	End	Sewer operator	Outlet	Type	Volume	Source	Links
Oct 20, 2026, 1:59 PM EDT	still listed as in effect	not stated	Not provided	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS DEC Harmful Algal Blooms Program (NYHABS), record d6e78259-9c57-4959-8452-d8960556df93, updated by the source Oct 20, 2026, 8:00 AM EDT, retrieved 2026-11-02 20:38 UTC · Read the original notice	Read report: Cyanobacteria advisory (harmful blue-green algae), , Oct 20, 2026, 1:59 PM EDT · Map
Aug 30, 2025	Sep 2, 2025	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2025-08-30, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Aug 8, 2025	Aug 13, 2025	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2025-08-08, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Aug 2, 2025	Aug 6, 2025	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2025-08-02, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Jul 25, 2025	Jul 30, 2025	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2025-07-25, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Jul 18, 2025	Jul 21, 2025	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2025-07-18, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Jun 26, 2025	Jul 1, 2025	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2025-06-26, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Aug 13, 2024	Aug 16, 2024	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2024-08-13, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Jul 21, 2024	Jul 25, 2024	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2024-07-21, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Jul 2, 2024	Jul 10, 2024	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2024-07-02, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Jun 16, 2024	Jun 18, 2024	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2024-06-16, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Aug 11, 2023	Aug 17, 2023	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2023-08-11, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Jul 18, 2023	Jul 28, 2023	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2023-07-18, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Jun 29, 2023	Jul 14, 2023	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2023-06-29, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Sep 3, 2022	Sep 6, 2022	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2022-09-03, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Aug 27, 2022	Aug 31, 2022	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2022-08-27, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Aug 13, 2022	Aug 24, 2022	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2022-08-13, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Aug 4, 2022	Aug 9, 2022	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2022-08-04, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Jul 31, 2022	Aug 2, 2022	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2022-07-31, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Jul 24, 2022	Jul 28, 2022	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2022-07-24, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Jul 15, 2022	Jul 19, 2022	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2022-07-15, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Jul 7, 2022	Jul 11, 2022	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2022-07-07, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Aug 19, 2021	Aug 25, 2021	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2021-08-19, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Jul 23, 2021	Jul 28, 2021	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2021-07-23, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year
Jul 10, 2021	Jul 15, 2021	not stated	Long Point SP (Allegany)	Cyanobacteria advisory (harmful blue-green algae)	volume not reported	NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record long-point-sp-allegany:lake-chautauqua:2021-07-10, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice	Open record below · Map
Read the full record See it in the archive for its year

Showing the latest 25 records of 39 records. See them all with filters.

All reports in New York by year: 2026 (1 here) · 2025 (6 here) · 2024 (4 here) · 2023 (3 here) · 2022 (8 here) · 2021 (4 here) · 2020 (3 here) · 2019 (3 here) · 2018 (3 here) · 2017 (2 here) · 2016 (1 here) · 2015 (1 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.

Boat launches

Bemus Point Boat Launch · Boat ramp
Lakeside Park Boat Launch · Boat ramp
Lakewood Community Park Boat Launch, Celoron · Boat ramp
Long Point Boat Launch, Bemus Point · Boat ramp
Lucille Ball Memorial Park Boat Launch, Celoron · Boat ramp
Prendergast Point Boat Launch, Chautauqua · Boat ramp

Source: OpenBoatLaunch launch records (public agency data and OpenStreetMap, Open Database License). · Chautauqua Lake on OpenBoatLaunch

Nearby waters

Quaker Lake, NY No current status shown about 45 km away
Red House Lake, NY Discharge or advisory reportedSource update overdue about 53 km away
Cattaraugus Creek, NY No current status shown about 66 km away
Woodcock Creek Lake, PA No current status shown about 79 km away

Sources covering this water

NYHABS · Update overdue · Last successful check: 2026-11-02 20:38 UTC Source update overdue
State Park beaches · Latest check succeeded · Last successful check: 2026-11-02 21:20 UTC

39 records linked to this water. Updated Nov 2, 2026, 4:26 PM EST.