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Cyanobacteria advisory (harmful blue-green algae) reported, Sep 1, 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 ef4b2a0e-5571-4a2b-a626-07d72cb18291, updated by the source Sep 15, 2026, 12:36 PM 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: “Lake Okeechobee - POLESOUT”. Location: 27.03820, -80.91854; location source: given in the source record, accurate to about 10 metres.

2. Waters named in the notice

The notice names: “Lake Okeechobee”. DirtyWaterWatch links this report to Lake Okeechobee, 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 1, 2026, 12:38 PM EDT

Ended

Oct 6, 2026, 1:09 PM EDT

Detail provided by the source

Times known to the minute

Reported to the source

not given

Published

not given

Source last updated

Sep 15, 2026, 12:36 PM 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: Raphidiopsis raciborskii and Planktolyngbya spp.; Co-dominant taxa were: Raphidiopsis raciborskii and Planktolyngbya limnetica; Dominant taxon: Planktolyngbya limnetica)”

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 1, 2026, 12:38 PM EDT to Oct 6, 2026, 1:09 PM 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

ef4b2a0e-5571-4a2b-a626-07d72cb18291

Original notice

Read the original notice

Earlier version

None: this is the first record

Later versions

None

{
  "site": "Lake Okeechobee - POLESOUT",
  "site_key": "lake okeechobee polesout",
  "county": "Glades",
  "group": "SFWMD",
  "visits": [
    {
      "time": "2026-09-01T12:38:00-04:00",
      "globalid": "ef4b2a0e-5571-4a2b-a626-07d72cb18291",
      "bloom_observed": "No",
      "toxin_present": "Yes",
      "microcystin": "not detected",
      "other_toxins": "Anatoxin-a: not detected; Cylindrospermopsin: 0.76; Nodularin-R: not detected; Saxitoxins: not detected",
      "taxa": "Co-dominant taxa were: Raphidiopsis raciborskii and Planktolyngbya spp.",
      "cyanobacteria_dominant": "Yes",
      "sample_depth": "SurfaceGrab",
      "group": "SFWMD",
      "edited": "2026-09-15T14:21:12.587000-04:00"
    },
    {
      "time": "2026-09-15T12:36:00-04:00",
      "globalid": "5999dd33-0cf4-4ee0-8890-eb6d492320ca",
      "bloom_observed": "No",
      "toxin_present": "Yes",
      "microcystin": "not detected",
      "other_toxins": "Anatoxin-a: not detected; Cylindrospermopsin: 0.88; Nodularin-R: not detected; Saxitoxins: not detected",
      "taxa": "Co-dominant taxa were: Raphidiopsis raciborskii and Planktolyngbya limnetica",
      "cyanobacteria_dominant": "Yes",
      "sample_depth": "SurfaceGrab",
      "group": "SFWMD",
      "edited": "2026-09-17T17:32:31.544000-04:00"
    },
    {
      "time": "2026-10-06T13:09:00-04:00",
      "globalid": "1ac2dafd-1c9e-4c6f-8c52-c52c6dc1f1fd",
      "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": "Dominant taxon: Planktolyngbya limnetica",
      "cyanobacteria_dominant": "Yes",
      "sample_depth": "SurfaceGrab",
      "group": "SFWMD",
      "edited": "2026-10-21T16:57:00.073000-04:00"
    }
  ],
  "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"
}