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New York / Waters /

Cayuga Lake

Lake in New York, near Aurora, Ithaca, Mud Lock, Myers, Seneca Falls, Union Springs and Willets

Current status

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 Cayuga Inlet (Cayuga Lake) at Ithaca NY gauge, 1.2 kilometres 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 04233500, 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); 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.

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 .

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

  • Discharges affecting the Cayuga Lake in New York, last 12 months11 affecting this stretch: 1 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 Cayuga Lake in New York, last 12 months1Reported on the Cayuga Lake in New York: 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 Cayuga Lake in New York, last 12 months0Reported on the Cayuga Lake in New York: 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 Cayuga Lake in New York0.0%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 Cayuga Lake in New York0Reported on the Cayuga Lake in New York: 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

1 reported discharge, 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

1 discharge report has no end time and is not marked ongoing; under DirtyWaterWatch rules it shows caution, not a discharge or advisory status, and adds no hours here.

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

1 reported discharge, 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 1 report 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

1 discharge report has no end time and is not marked ongoing; under DirtyWaterWatch rules it shows caution, not a discharge or advisory status, and adds no hours here.

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. 1 discharge report has no end time and is not marked ongoing; under DirtyWaterWatch rules it shows caution, not a discharge or advisory status, and adds no hours here.

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 Cayuga Lake

Reports linked to Cayuga Lake, newest first
StartEnd Sewer operator OutletTypeVolumeSourceLinks
Oct 27, 2026, 10:01 AM 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 42a6fe81-3f63-4e7b-8bb4-97603e44be89, updated by the source Oct 28, 2026, 8:00 AM EDT, retrieved 2026-11-02 20:38 UTC · Read the original notice
Oct 23, 2026, 1:00 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 b61b535e-9c04-4db8-86b5-d9cc66d6807d, updated by the source Oct 28, 2026, 8:00 AM EDT, retrieved 2026-11-02 20:38 UTC · Read the original notice
Oct 21, 2026, 3:41 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 c72d6194-c275-4b54-89dc-abbb98ee2d1e, updated by the source Oct 22, 2026, 9:01 AM EDT, retrieved 2026-11-02 20:38 UTC · Read the original notice
Oct 19, 2026, 5:42 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 1f5f3069-8a14-4aee-81d1-b8711efa5a43, updated by the source Oct 21, 2026, 8:00 AM EDT, retrieved 2026-11-02 20:38 UTC · Read the original notice
May 24, 2026, 5:00 AM EDT end time not reported Cayuga Heights (V) WWTP sludge digester overflow Treatment bypass 5,000 gallons Cayuga Heights (V) WWTP (NY DEC Sewage Pollution Right to Know), record 2527435245569795, reported May 24, 2026, 12:52 PM EDT, retrieved 2026-11-02 20:40 UTC · Read the original notice
Aug 22, 2025 Aug 25, 2025 not stated Taughannock Falls SP Cyanobacteria advisory (harmful blue-green algae) volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record taughannock-falls-sp:cayuga-lake:2025-08-22, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Aug 15, 2025 Aug 18, 2025 not stated Taughannock Falls SP Cyanobacteria advisory (harmful blue-green algae) volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record taughannock-falls-sp:cayuga-lake:2025-08-15, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Aug 3, 2025 Aug 5, 2025 not stated Taughannock Falls SP Cyanobacteria advisory (harmful blue-green algae) volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record taughannock-falls-sp:cayuga-lake:2025-08-03, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Jul 14, 2025 Jul 15, 2025 not stated Cayuga Lake SP Beach advisory volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record cayuga-lake-sp:cayuga-lake:2025-07-14, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Jul 12, 2025 Jul 17, 2025 not stated Taughannock Falls SP Cyanobacteria advisory (harmful blue-green algae) volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record taughannock-falls-sp:cayuga-lake:2025-07-12, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Jul 9, 2025 Jul 11, 2025 not stated Taughannock Falls SP Cyanobacteria advisory (harmful blue-green algae) volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record taughannock-falls-sp:cayuga-lake:2025-07-09, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Aug 12, 2024 Aug 14, 2024 not stated Cayuga Lake SP Beach closure volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record cayuga-lake-sp:cayuga-lake:2024-08-12, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Aug 2, 2024 Aug 5, 2024 not stated Taughannock Falls SP Cyanobacteria advisory (harmful blue-green algae) volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record taughannock-falls-sp:cayuga-lake:2024-08-02, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Jul 29, 2024 Aug 8, 2024 not stated Cayuga Lake SP Beach closure volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record cayuga-lake-sp:cayuga-lake:2024-07-29, 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 23, 2024 not stated Cayuga Lake SP Beach advisory volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record cayuga-lake-sp:cayuga-lake:2024-07-22, 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 23, 2024 not stated Taughannock Falls SP Cyanobacteria advisory (harmful blue-green algae) volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record taughannock-falls-sp:cayuga-lake:2024-07-22, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Jul 6, 2024 Jul 8, 2024 not stated Taughannock Falls SP Cyanobacteria advisory (harmful blue-green algae) volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record taughannock-falls-sp:cayuga-lake:2024-07-06, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Sep 1, 2023 Sep 5, 2023 not stated Taughannock Falls SP Cyanobacteria advisory (harmful blue-green algae) volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record taughannock-falls-sp:cayuga-lake:2023-09-01, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Aug 5, 2023 Aug 7, 2023 not stated Taughannock Falls SP Cyanobacteria advisory (harmful blue-green algae) volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record taughannock-falls-sp:cayuga-lake:2023-08-05, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Jul 31, 2023 Aug 8, 2023 not stated Cayuga Lake SP Beach closure volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record cayuga-lake-sp:cayuga-lake:2023-07-31, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Jul 7, 2023 Jul 10, 2023 not stated Taughannock Falls SP Cyanobacteria advisory (harmful blue-green algae) volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record taughannock-falls-sp:cayuga-lake:2023-07-07, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Jul 1, 2023 Jul 5, 2023 not stated Taughannock Falls SP Cyanobacteria advisory (harmful blue-green algae) volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record taughannock-falls-sp:cayuga-lake:2023-07-01, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Aug 22, 2022 Aug 24, 2022 not stated Taughannock Falls SP Cyanobacteria advisory (harmful blue-green algae) volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record taughannock-falls-sp:cayuga-lake:2022-08-22, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Jul 25, 2022 Jul 26, 2022 not stated Cayuga Lake SP Beach advisory volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record cayuga-lake-sp:cayuga-lake:2022-07-25, the source gives no report time, retrieved 2026-11-02 21:19 UTC · Read the original notice
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Jul 15, 2022 Jul 25, 2022 not stated Taughannock Falls SP Cyanobacteria advisory (harmful blue-green algae) volume not reported NYS Office of Parks, Recreation and Historic Preservation (State Park beaches), record taughannock-falls-sp:cayuga-lake:2022-07-15, 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 54 records. See them all with filters.

All reports in New York by year: 2026 (5 here) · 2025 (6 here) · 2024 (6 here) · 2023 (5 here) · 2022 (3 here) · 2021 (2 here) · 2020 (6 here) · 2019 (8 here) · 2018 (9 here) · 2017 (3 here) · 2015 (1 here)

Beaches named in these records: Cayuga Lake SP, Taughannock Falls 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.

Boat launches

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

Nearby waters

Sources covering this water

54 records linked to this water. Updated .