Subscribe to Weekly Updates

Current Weekly Update

June 13-June 19 — There were 12 reported site visits in the past seven days with 12 samples collected. Algal bloom conditions were observed by samplers at eight of the sites.

The satellite imagery for Lake Okeechobee from 6/19 is partially obscured by cloud cover and shows low to moderate bloom potential on approximately 60-70% of the lake, with a patch of high bloom potential near Clewiston.

The satellite imagery for the Caloosahatchee Estuary from 6/19 is partially obscured by cloud cover and shows no bloom potential on visible portions of the estuary.

The satellite imagery for the St. Lucie Estuary from 6/19 is partially obscured by cloud cover and shows no bloom potential on visible portions of the estuary.

The satellite imagery for the St. Johns River from 6/19 is partially obscured by cloud cover and shows moderate bloom potential throughout visible portions of Lake George and low to moderate bloom potential on the mainstem of the St. Johns River downstream to Orange Park.

Please keep in mind that bloom potential is subject to change due to rapidly changing environmental conditions or satellite inconsistencies (i.e., wind, rain, temperature or stage).

On 6/16-6/19 Florida Department of Environmental Protection staff collected 11 Harmful Algal Bloom (HAB) response samples. Dominant algal taxa and cyanotoxin results follow each waterbody name.

Lake Crago — by Boat Ramp: Microcystis aeruginosa; 1.7 parts per billion (ppb) microcystins detected.

Lake Okeechobee — Torry Island Marina Main Ramp: Microcystis aeruginosa; trace level (0.10 ppb) microcystins detected.

Lake Killarney — Killarney Drive: No dominant algal taxon; no cyanotoxins detected.

Lake Okeechobee — S308C (lakeside): Microcystis aeruginosa; no cyanotoxins detected.

C44 canal — S308C (canal side): No dominant algal taxon; no cyanotoxins detected.

Doctors Lake — Pace Island Back Park Dock: Microcystis aeruginosa and Planktolyngbya limnetica co-dominant; trace level (0.98 ppb) microcystins detected.

Lake Grady — at Shadow Run Dam: Microcystis aeruginosa; no cyanotoxins detected.

Dead Lake — South Cove: Microcystis panniformis; trace level (0.48 ppb) microcystins detected.

Bull Creek — near boat ramp: Microcystis aeruginosa and Dolichospermum circinale co-dominant; no cyanotoxins detected.

Tiger Lake — near Northeast Shore: Microcystis aeruginosa and Microcystis wesenbergii co-dominant; trace levels of microcystins and cylindrospermopsin detected (0.27 ppb and 0.25 ppb, respectively).

Deerpoint Lake — near Resota Beach: Results pending.

On 6/16, St. Johns River Water Management District staff collected one routine HAB sample at Lake Washington — Center. There was no dominant algal taxon and no cyanotoxins detected.

Results for completed analyses are available at FloridaDEP.gov/AlgalBloom. 

This is a high-level summary of the sampling events for the reported week. For all field visit and analytical result details, please refer to the complete algal bloom map with data table by clicking the “Field and Lab Details” Quick Link from the Algal Bloom Dashboard. Different types of blue-green algal bloom species can look different and have different impacts. However, regardless of species, many types of blue-green algae can produce toxins that can make you or your pets sick if swallowed or possibly cause skin and/or eye irritation due to contact. We advise staying out of water where algae is visibly present as specks or mats or where water is discolored pea-green, blue-green or brownish-red. Additionally, pets or livestock should not come into contact with algal bloom-impacted water or with algal bloom material or fish on the shoreline.

Weekly Update Archive

 

Last Modified: Friday, Jun 20, 2025 - 03:57pm