Canandaigua Lake
Lake in New York, near Canandaigua, Grange Landing and Woodville
Current status
A discharge is reported as ongoing, a post-discharge period applies, or an official advisory is listed. Open the report for its source, dates and advice. This status since . 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.
Bookmark this water page and check it before each trip · Report a missing notice or error
About this status
Why this status: Discharge or advisory reported: official advisory.
Why we use this rule: An official advisory is listed. We show it while the authority keeps it in place; an old or missing update does not mean the advisory was lifted.
Source: https://on.ny.gov/nyhabs. How long each status lasts, and why
Source: NYS DEC Harmful Algal Blooms Program (NYHABS), record ef180a30-a87c-4452-80f9-1bede1206237, updated by the source Oct 29, 2026, 8:00 AM EDT, retrieved 2026-11-02 20:38 UTC · Read the original notice
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 .
Reports behind this status
- Discharge or advisory reported Cyanobacteria advisory (harmful blue-green algae) · operator not stated · outlet not stated · Oct 25, 2026, 5:07 PM EDT to still listed as in effect · volume not reported · Official advisory in effect, current rule period ends Nov 12, 2026, 7:00 AM EST
Source: NYS DEC Harmful Algal Blooms Program (NYHABS), record ef180a30-a87c-4452-80f9-1bede1206237, updated by the source Oct 29, 2026, 8:00 AM EDT, retrieved 2026-11-02 20:38 UTC · Read the original notice
- Discharge or advisory reported Cyanobacteria advisory (harmful blue-green algae) · operator not stated · outlet not stated · Oct 21, 2026, 12:30 PM EDT to still listed as in effect · volume not reported · Official advisory in effect, current rule period ends Nov 5, 2026, 7:00 AM EST
Source: NYS DEC Harmful Algal Blooms Program (NYHABS), record 1d674de9-a262-4bb3-8a31-1a6c025f0667, updated by the source Oct 22, 2026, 8:00 AM EDT, retrieved 2026-11-02 20:38 UTC · Read the original notice
Advice in the reports
NYS DEC Harmful Algal Blooms Program (NYHABS) · Oct 25, 2026 · Current status: sets this water's status now
“Learn how to Know it, Avoid it, Report it at https://www.dec.ny.gov/chemical/77118.html?”
The last 90 days
- Discharge or advisory reported: to the latest update 2 reports: NYS DEC Harmful Algal Blooms Program (NYHABS) 2
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.
A source update was overdue from Nov 2, 2026, 3:00 PM EST to the latest update.
Reported discharges over time
- Hours with a discharge or advisory status on the Canandaigua Lake in New York, last 12 months294Reported on the Canandaigua 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 Canandaigua Lake in New York85%May to October 2026; incomplete source coverageShare 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 Canandaigua Lake in New York2Reported on the Canandaigua Lake 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.
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
- No tracked source for this period
- Incomplete source coverage
No tracked source covers January 2022 to September 2026.
Source: ny-dec-habs. Records cover October 19, 2026 to November 2, 2026.
Show table
| Month | Hours with a discharge or advisory status | Hours from post-discharge periods | Hours from official advisories only | Hours in the month | Coverage |
|---|---|---|---|---|---|
| January 2022 | 0 | 0 | 0 | 744 | No tracked source for this period |
| February 2022 | 0 | 0 | 0 | 672 | No tracked source for this period |
| March 2022 | 0 | 0 | 0 | 744 | No tracked source for this period |
| April 2022 | 0 | 0 | 0 | 720 | No tracked source for this period |
| May 2022 | 0 | 0 | 0 | 744 | No tracked source for this period |
| June 2022 | 0 | 0 | 0 | 720 | No tracked source for this period |
| July 2022 | 0 | 0 | 0 | 744 | No tracked source for this period |
| August 2022 | 0 | 0 | 0 | 744 | No tracked source for this period |
| September 2022 | 0 | 0 | 0 | 720 | No tracked source for this period |
| October 2022 | 0 | 0 | 0 | 744 | No tracked source for this period |
| November 2022 | 0 | 0 | 0 | 720 | No tracked source for this period |
| December 2022 | 0 | 0 | 0 | 744 | No tracked source for this period |
| January 2023 | 0 | 0 | 0 | 744 | No tracked source for this period |
| February 2023 | 0 | 0 | 0 | 672 | No tracked source for this period |
| March 2023 | 0 | 0 | 0 | 744 | No tracked source for this period |
| April 2023 | 0 | 0 | 0 | 720 | No tracked source for this period |
| May 2023 | 0 | 0 | 0 | 744 | No tracked source for this period |
| June 2023 | 0 | 0 | 0 | 720 | No tracked source for this period |
| July 2023 | 0 | 0 | 0 | 744 | No tracked source for this period |
| August 2023 | 0 | 0 | 0 | 744 | No tracked source for this period |
| September 2023 | 0 | 0 | 0 | 720 | No tracked source for this period |
| October 2023 | 0 | 0 | 0 | 744 | No tracked source for this period |
| November 2023 | 0 | 0 | 0 | 720 | No tracked source for this period |
| December 2023 | 0 | 0 | 0 | 744 | No tracked source for this period |
| January 2024 | 0 | 0 | 0 | 744 | No tracked source for this period |
| February 2024 | 0 | 0 | 0 | 696 | No tracked source for this period |
| March 2024 | 0 | 0 | 0 | 744 | No tracked source for this period |
| April 2024 | 0 | 0 | 0 | 720 | No tracked source for this period |
| May 2024 | 0 | 0 | 0 | 744 | No tracked source for this period |
| June 2024 | 0 | 0 | 0 | 720 | No tracked source for this period |
| July 2024 | 0 | 0 | 0 | 744 | No tracked source for this period |
| August 2024 | 0 | 0 | 0 | 744 | No tracked source for this period |
| September 2024 | 0 | 0 | 0 | 720 | No tracked source for this period |
| October 2024 | 0 | 0 | 0 | 744 | No tracked source for this period |
| November 2024 | 0 | 0 | 0 | 720 | No tracked source for this period |
| December 2024 | 0 | 0 | 0 | 744 | No tracked source for this period |
| January 2025 | 0 | 0 | 0 | 744 | No tracked source for this period |
| February 2025 | 0 | 0 | 0 | 672 | No tracked source for this period |
| March 2025 | 0 | 0 | 0 | 744 | No tracked source for this period |
| April 2025 | 0 | 0 | 0 | 720 | No tracked source for this period |
| May 2025 | 0 | 0 | 0 | 744 | No tracked source for this period |
| June 2025 | 0 | 0 | 0 | 720 | No tracked source for this period |
| July 2025 | 0 | 0 | 0 | 744 | No tracked source for this period |
| August 2025 | 0 | 0 | 0 | 744 | No tracked source for this period |
| September 2025 | 0 | 0 | 0 | 720 | No tracked source for this period |
| October 2025 | 0 | 0 | 0 | 744 | No tracked source for this period |
| November 2025 | 0 | 0 | 0 | 720 | No tracked source for this period |
| December 2025 | 0 | 0 | 0 | 744 | No tracked source for this period |
| January 2026 | 0 | 0 | 0 | 744 | No tracked source for this period |
| February 2026 | 0 | 0 | 0 | 672 | No tracked source for this period |
| March 2026 | 0 | 0 | 0 | 744 | No tracked source for this period |
| April 2026 | 0 | 0 | 0 | 720 | No tracked source for this period |
| May 2026 | 0 | 0 | 0 | 744 | No tracked source for this period |
| June 2026 | 0 | 0 | 0 | 720 | No tracked source for this period |
| July 2026 | 0 | 0 | 0 | 744 | No tracked source for this period |
| August 2026 | 0 | 0 | 0 | 744 | No tracked source for this period |
| September 2026 | 0 | 0 | 0 | 720 | No tracked source for this period |
| October 2026 | 252 | 0 | 252 | 744 | Incomplete source coverage |
| November 2026 | 42 | 0 | 42 | 42 |
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
Source: ny-dec-habs. Records cover October 19, 2026 to November 2, 2026.
Show table
| Year | Hours with a discharge or advisory status | Share of the year | Coverage |
|---|---|---|---|
| 2026 | 294 | 4.0% | Incomplete source coverage |
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-habs: records from October 19, 2026 to the latest update
Reports linked to Canandaigua Lake
| Start | End | Sewer operator | Outlet | Type | Volume | Source | Links |
|---|---|---|---|---|---|---|---|
| Oct 25, 2026, 5:07 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 ef180a30-a87c-4452-80f9-1bede1206237, updated by the source Oct 29, 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 25, 2026, 5:07 PM EDT · Map |
| Oct 21, 2026, 12:30 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 1d674de9-a262-4bb3-8a31-1a6c025f0667, updated by the source Oct 22, 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 21, 2026, 12:30 PM EDT · Map |
All reports in New York by year: 2026 (2 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
- Canandaigua Lake Marine Park · Boat ramp
- Onanda Park Boat Launch, Grange Landing · Boat ramp
- Woodville Boat Launch · Boat ramp
Source: OpenBoatLaunch launch records (public agency data and OpenStreetMap, Open Database License). · Canandaigua Lake on OpenBoatLaunch
Nearby waters
- Honeoye Lake, NY No current status shown about 17 km away
- Canandaigua Outlet, NY No current status shown about 27 km away
- Honeoye Creek, NY No current status shown about 28 km away
- Keuka Lake, NY No current status shown about 30 km away
- Conesus Lake, NY No current status shown about 33 km away
Sources covering this water
- NYHABS · Update overdue · Last successful check: 2026-11-02 20:38 UTC Source update overdue
2 records linked to this water. Updated .