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Cyanobacteria advisory (harmful blue-green algae) reported, Sep 9, 2026

Advisory lifted · Florida Department of Environmental Protection (Algal Bloom Sampling)

Source: Florida Department of Environmental Protection (Algal Bloom Sampling) via Florida DEP Algal Bloom Sampling, blooms and toxins by site, record 80c061bd-b066-4c79-832a-19dc94f6aebe, updated by the source Sep 9, 2026, 10:39 AM EDT, retrieved 2026-11-05 01:05 UTC · Read the original notice

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1. Where the advisory applies

Issued by: Florida Department of Environmental Protection (Algal Bloom Sampling). Place named: “Crescent Lake - mouth of Dunns Creek (CRESLM)”. Location: 29.52956, -81.55372; location source: given in the source record, accurate to about 10 metres.

2. Waters named in the notice

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

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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

Sep 9, 2026, 10:39 AM EDT

Ended

Sep 23, 2026, 9:54 AM EDT

Detail provided by the source

Times known to the minute

Reported to the source

not given

Published

not given

Source last updated

Sep 9, 2026, 10:39 AM EDT

Last retrieved by DirtyWaterWatch

2026-11-05 01:05 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 lifted

Material

“algal bloom (Co-dominant taxa were: Microcystis aeruginosa and Dolichospermum circinale; mixed algae; no dominant species in sample)”

Advice from Florida Department of Environmental Protection (Algal Bloom Sampling)

This report includes no advice. Check current local health notices.

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, Sep 9, 2026, 10:39 AM EDT to Sep 23, 2026, 9:54 AM EDT

Source: DirtyWaterWatch calculations using this report and the published status rules. Updated 2026-11-05 01:25 UTC.

Source and versions

Source

Florida DEP Algal Bloom Sampling, blooms and toxins by site

Source record number

80c061bd-b066-4c79-832a-19dc94f6aebe

Original notice

Read the original notice

Earlier version

None: this is the first record

Later versions

None

{
  "site": "Crescent Lake - mouth of Dunns Creek (CRESLM)",
  "site_key": "crescent lake mouth of dunns creek creslm",
  "county": "Putnam",
  "group": "SJRWMD",
  "visits": [
    {
      "time": "2026-09-09T10:39:00-04:00",
      "globalid": "80c061bd-b066-4c79-832a-19dc94f6aebe",
      "bloom_observed": "Yes",
      "toxin_present": "No",
      "microcystin": "not detected",
      "other_toxins": "Anatoxin-a: not detected; Cylindrospermopsin: not detected; Nodularin-R: not detected; Saxitoxins: not detected",
      "taxa": "Co-dominant taxa were: Microcystis aeruginosa and Dolichospermum circinale",
      "cyanobacteria_dominant": "Yes",
      "sample_depth": "SurfaceGrab",
      "group": "SJRWMD",
      "edited": "2026-11-04T02:38:19.803000-05:00"
    },
    {
      "time": "2026-09-23T09:54:00-04:00",
      "globalid": "5665c9fc-d4ff-4527-89a3-250bd0f19ff8",
      "bloom_observed": "No",
      "toxin_present": "No",
      "microcystin": "not detected",
      "other_toxins": "Anatoxin-a: not detected; Cylindrospermopsin: not detected; Nodularin-R: not detected; Saxitoxins: not detected",
      "taxa": "mixed algae; no dominant species in sample",
      "cyanobacteria_dominant": "No",
      "sample_depth": "SurfaceGrab",
      "group": "SJRWMD",
      "edited": "2026-11-04T02:38:30.107000-05:00"
    }
  ],
  "basis": "Florida DEP observed an algal bloom, or found an algal toxin, in a sample at this site. This is a sampling result, not a health advisory; the Florida Department of Health issues health alerts separately.",
  "ended_at_basis": "the next visit found no bloom and no toxin"
}