New York / Reports /

Cyanobacteria advisory (harmful blue-green algae) reported, Oct 25, 2026

Advisory active · NYS DEC Harmful Algal Blooms Program (NYHABS)

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

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1. Reported wastewater outlet

Operator named in the record: not named. Outlet: not stated. Location: 42.87157, -77.25812; location source: given in the source record.

Outfall: a pipe or outlet where wastewater enters a water body.

2. Waters named in the notice

The notice names: “Canandaigua Lake”. DirtyWaterWatch links this report to Canandaigua Lake, NY. Match basis: the water named in the report.

3. Estimated downstream stretch

We estimate routes only on rivers before they become tidal. We do not estimate routes through tidal water or lakes.

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When it happened and when it was reported

Event and notice times use Eastern Time (EST or EDT). Retrieval times use Coordinated Universal Time (UTC).

Started

Oct 25, 2026, 5:07 PM EDT

Ended

not reported

Detail provided by the source

Times known to the minute

Reported to the source

not given

Published

not given

Source last updated

Oct 29, 2026, 8:00 AM EDT

Last retrieved by DirtyWaterWatch

2026-11-02 20:38 UTC

What and how much

Type

Cyanobacteria (harmful blue-green algae) can make water unfit for contact; the issuing authority decides when its advisory ends.

Status in the record

Advisory active

Material

“cyanobacteria bloom (Confirmed; extent Small Localized)”

Volume

volume not reported (not stated whether estimated or measured)

Volume as reported

none

Advice from NYS DEC Harmful Algal Blooms Program (NYHABS)

“Learn how to Know it, Avoid it, Report it at https://www.dec.ny.gov/chemical/77118.html?”

Advice period

This report does not state a period. See the rule DirtyWaterWatch applies and its source.

Basis

not stated

Status history from this report

• Discharge or advisory reported Canandaigua Lake: Official advisory in effect, Oct 25, 2026, 5:07 PM EDT to Nov 12, 2026, 7:00 AM EST
• No current status shown Canandaigua Lake: Advisory not re-confirmed by its source recently, Nov 12, 2026, 7:00 AM EST to Jan 23, 2027, 4:07 PM EST

Source: DirtyWaterWatch calculations using this report and the published status rules. Updated 2026-11-02 21:26 UTC.

Source and versions

Source

NYHABS

Source record number

ef180a30-a87c-4452-80f9-1bede1206237

Original notice

Read the original notice

Earlier version

None: this is the first record

Later versions

None

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  "attributes": {
    "objectid": 41700,
    "globalid": "ef180a30-a87c-4452-80f9-1bede1206237",
    "date_time": 1792962420000,
    "county": "Ontario",
    "data_provider": "CAN",
    "water_name": "Canandaigua Lake",
    "extent_bloom": "Small Localized",
    "HAB_STATUS": "Confirmed",
    "STATUS_DATE": 1793275200000,
    "Weblink": "Learn how to Know it, Avoid it, Report it at https://www.dec.ny.gov/chemical/77118.html?"
  },
  "first_seen_at": "2026-11-02T20:38:02+00:00",
  "last_seen_at": "2026-11-02T20:38:43+00:00",
  "_water": {
    "text": "Canandaigua Lake",
    "notes": null,
    "checked_against_point": true
  }
}