New York / Reports /

Cyanobacteria advisory (harmful blue-green algae) reported, Nov 2, 2026

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

Source: NYS DEC Harmful Algal Blooms Program (NYHABS) via DEC NYHABS current HAB reports (Current_HAB_Reports_DIL / Current_HAB_Reports_7_3_19) and Archived_HAB_Reports, record fc155d24-2b82-4eb1-8e01-534f3db72ad8, updated by the source Nov 3, 2026, 8:00 AM EST, retrieved 2026-11-05 06:12 UTC · Read the original notice

Read the original notice · Report an error

1. Where the advisory applies

Issued by: NYS DEC Harmful Algal Blooms Program (NYHABS). Location: 42.54298, -73.60535; location source: given in the source record.

2. Waters named in the notice

The notice names: “Nassau Lake”. Not linked to a mapped water.

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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

Nov 2, 2026, 11:16 AM EST

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

Nov 3, 2026, 8:00 AM EST

Last retrieved by DirtyWaterWatch

2026-11-05 06:12 UTC

What was reported

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 Large Localized)”

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 a water not yet on the map: Official advisory in effect, Nov 2, 2026, 11:16 AM EST to Nov 17, 2026, 8:00 AM EST (the end is scheduled: a new report can change it)
• No current status shown a water not yet on the map: advisory not re-confirmed by its source recently, no map colour, Nov 17, 2026, 8:00 AM EST to Jan 31, 2027, 11:16 AM EST (scheduled: a new report can change it)

Source: DirtyWaterWatch calculations using this report and the published status rules. Updated 2026-11-05 06:27 UTC.

Source and versions

Source

DEC NYHABS current HAB reports (Current_HAB_Reports_DIL / Current_HAB_Reports_7_3_19) and Archived_HAB_Reports

Source record number

fc155d24-2b82-4eb1-8e01-534f3db72ad8

Original notice

Read the original notice

Earlier version

None: this is the first record

Later versions

None

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    "globalid": "fc155d24-2b82-4eb1-8e01-534f3db72ad8",
    "date_time": 1793636160000,
    "county": "Rensselaer",
    "data_provider": "PUB",
    "water_name": "Nassau Lake",
    "extent_bloom": "Large Localized",
    "HAB_STATUS": "Confirmed",
    "STATUS_DATE": 1793710800000,
    "Weblink": "Learn how to Know it, Avoid it, Report it at https://www.dec.ny.gov/chemical/77118.html?"
  },
  "first_seen_at": "2026-11-04T18:42:18+00:00",
  "last_seen_at": "2026-11-05T06:13:01+00:00"
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