Subscribe to Weekly Updates

Current Weekly Update

June 27-July 10 — There were 60 reported site visits in the past 14 days with 60 samples collected. Algal bloom conditions were observed by samplers at 22 of the sites.

The satellite imagery for Lake Okeechobee from 7/10 is partially obscured by cloud cover and shows low to moderate bloom potential on approximately 65% of the lake, with the highest potential in the northern and northeastern portions of the lake.

The satellite imagery for the Caloosahatchee Estuary from 7/10 is partially obscured by cloud cover and shows no significant bloom potential on visible portions of the estuary.

The most recent useable satellite imagery for the St. Lucie Estuary from 7/8 is partially obscured by cloud cover and shows no bloom potential on visible portions of the estuary.

The most recent useable satellite imagery for the St. Johns River from 7/6 is partially obscured by cloud cover and shows moderate to high bloom potential throughout visible portions of Lake George and patchy low to moderate bloom potential on the mainstem of the St. Johns River downstream to Doctors Lake.

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 6/30-7/10, Florida Department of Environmental Protection (DEP) staff collected 20 Harmful Algal Bloom (HAB) response samples. Dominant algal taxa and cyanotoxin results follow each waterbody name.

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

C44 canal — S308C: Microcystis aeruginosa; no cyanotoxins detected.

Dead Lake — South Cove (6/30): Microcystis aeruginosa and Dolichospermum circinale co-dominant; 1.7 parts per billion (ppb) of microcystins detected.

Dead Lake — South Cove (7/10): Results pending.

Dead Lake — Bull Creek Boat Ramp (6/30): Microcystis aeruginosa and Dolichospermum circinale co-dominant; 1.7 ppb of microcystins detected.

Dead Lake — Bull Creek Boat Ramp (7/10): Results pending.

Fox Lake — South Shore: No dominant algal taxon; no cyanotoxins detected.

Fox Lake — Park Boat Ramp: Dolichospermum circinale; no cyanotoxins detected.

Doctors Lake — Pace Island Dock (6/30): Planktolyngbya limnetica and Aphanocapsa incerta co-dominant; no cyanotoxins detected.

Doctors Lake — Pace Island Dock (7/10): Results pending.

Lake Olivia — Southwest Shore: Algal mat sample dominated by Oedogonium sp. and the water sample had no dominant taxon; trace level (0.16 ppb) of cylindrospermopsin detected.

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

Caloosahatchee River — Southeast 32nd Street: No dominant algal taxon; no cyanotoxins detected.

Caloosahatchee River — Palaco Grande Canal: No dominant algal taxon; no cyanotoxins detected.

Caloosahatchee River — Rivers Condo: No dominant algal taxon; no cyanotoxins detected.

Withlacoochee River — Yacht Basin Park: Microcystis aeruginosa; no cyanotoxins detected.

East Lake — South Shore: Radiococcus sp.; no cyanotoxins detected.

Lake Pierce — Northwest: Results pending.

Lake Hamilton East — Sample Park: Results pending.

Lake Crago — by Boat Ramp: Results pending.

On 7/1-7/9, South Florida Water Management District staff collected 28 routine HAB monitoring samples and one HAB response sample on the C43 canal,

C44 canal and Lake Okeechobee. Dominant algal taxa and cyanotoxin results follow each waterbody name.

C43 canal — S77 (upstream): No dominant algal taxon; trace level (0.11 ppb) of cylindrospermopsin detected.

C44 canal — S308C:Dinophyceae; no cyanotoxins detected.

Lake Okeechobee — S308C (lakeside): No dominant algal taxon; no cyanotoxins detected.

KISSR0.0: Microcystis aeruginosa; no cyanotoxins detected.

LZ2: No dominant algal taxon; trace level (0.13 ppb) of cylindrospermopsin detected.

NES191: Microcystis aeruginosa and Planktolyngbya limnetica co-dominant; no cyanotoxins detected.

L001: Microcystis aeruginosa and Planktolyngbya limnetica co-dominant; trace level (0.13 ppb) of cylindrospermopsin detected.

NES135: Microcystis aeruginosa; 1.6 ppb of microcystins detected.

NCENTER: Raphidiopsis raciborskii and Planktolyngbya limnetica co-dominant; 0.49 ppb of cylindrospermopsin detected.

EASTSHORE: Microcystis aeruginosa and Planktolyngbya limnetica co-dominant; 3.4 ppb of microcystins detected.

L004: Microcystis aeruginosa; trace level (0.18 ppb) of microcystins detected.

L008: No dominant algal taxon; no cyanotoxins detected.

L005: No dominant algal taxon; no cyanotoxins detected.

POLESOUT3: Microcystis aeruginosa; no cyanotoxins detected.

POLESOUT2: No dominant algal taxon; no cyanotoxins detected.

POLESOUT1: Planktolyngbya limnetica ; no cyanotoxins detected.

POLESOUT: Planktolyngbya limnetica and Rhabdogloea sp.co-dominant; trace level (0.24 ppb) of cylindrospermopsin detected.

KBARSE: Planktolyngbya limnetica and Rhabdogloea sp.co-dominant; 0.58 ppb of cylindrospermopsin detected.

CLV10A: Microcystis aeruginosa and Raphidiopsis raciborskii co-dominant; no cyanotoxins detected.

LZ40: Microcystis aeruginosa; no cyanotoxins detected.

L006: No dominant algal taxon; no cyanotoxins detected.

Torry Island Marina Main Ramp: Microcystis aeruginosa and Dinophyceae co-dominant; no cyanotoxins detected.

PALMOUT3: No dominant algal taxon; no cyanotoxins detected.

PALMOUT2: Microcystis aeruginosa; no cyanotoxins detected.

PALMOUT1: Dolichospermum circinale; no cyanotoxins detected.

PALMOUT: No dominant algal taxon; no cyanotoxins detected.

LZ30: No dominant algal taxon; no cyanotoxins detected.

POLE3S: No dominant algal taxon; no cyanotoxins detected.

L007: No dominant algal taxon; no cyanotoxins detected.

On 7/8-7/10, St. Johns River Water Management District (SJRWMD) staff collected nine routine HAB sample and two HAB response samples. Dominant algal taxa and cyanotoxin results follow each waterbody name.

St. Johns River — Mandarin Point: No dominant algal taxon; no cyanotoxins detected.

Doctors Lake — Center: Planktolyngbya limnetica; no cyanotoxins detected.

St. Johns River — Shands Bridge: Microcystis aeruginosa; trace level (0.21 ppb) cylindrospermopsin detected.

St. Johns River — Racy Point: Microcystis aeruginosa and Planktolyngbya limnetica co-dominant; trace level (0.21 ppb) cylindrospermopsin detected.

Lake George — Center: Microcystis aeruginosa and Raphidiopsis raciborskii co-dominant; 0. 59 ppb of cylindrospermopsin detected.

Crescent Lake — mouth of Dunns Creek: Microcystis aeruginosa and Raphidiopsis raciborskii co-dominant; trace level (0.33 ppb) of cylindrospermopsin detected.

St. Johns River — South of U.S. Highway 17 Bridge: Microcystis aeruginosa and Raphidiopsis raciborskii co-dominant; trace level (0.19 ppb) of cylindrospermopsin detected.

Stick Marsh — North: Results pending.

Lake Jesup — Center: Results pending.

Blue Cypress Lake — Center: Results pending.

Lake Monroe — Center: Results pending.

Last Week

On 6/26, DEP staff collected three HAB response samples. Dominant algal taxa and cyanotoxin results follow each waterbody name.

Lake Crago — by Boat Ramp: Microcystis aeruginosa and Planktolyngbya limnetica co-dominant; trace levels (0.29 ppb and 0.27 ppb) of microcystins and anatoxin-a were detected, respectively. 

Waters Lake — Center: No dominant algal taxon; no cyanotoxins detected.

Reedy Lake — at Frostproof City Pier: Microcystis aeruginosa and Planktolyngbya limnetic a co-dominant; no cyanotoxins detected.

On 6/26, SJRWMD staff collected one HAB response and two HAB routine samples. Dominant algal taxa and cyanotoxin results follow each waterbody name.

Dead Lake — Bull Creek Boat Ramp: Microcystis aeruginosa and Dolichospermum circinale co-dominant; trace level (0.31 ppb) of microcystins detected.

Lake Jesup — Center: Microcystis aeruginosa and Planktolyngbya contorta co-dominant; no cyanotoxins detected.

Lake Monroe — Center: Microcystis aeruginosa and Planktolyngbya limnetica co-dominant; trace level (0.12 ppb) of cylindrospermopsin 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, Jul 11, 2025 - 05:57pm