Florida
Toxic algae in Indian River County lakes
11 lakes and waterways in Indian River County have harmful algal bloom reports in Florida's official data. The most recent entry is for Blue Cypress Lake: Florida's most recent sample from Blue Cypress Lake, on 17 December 2025 at Blue Cypress Lake - Center (BCL), found no visible bloom and no microcystin toxin was detected. Blue Cypress Lake and Stick Marsh have had blooms in three or more years.
Lakes with bloom history
Newest report first. Each lake has its own page with the full history and what the results mean.
Other waterbodies with a report
These have one or two reports in a single year, which isn't enough history for a page of their own yet.
- Blue Cypress Lake Se 2021
- Indian River 2020
- Lake Kenansville 2018
- North Central Blue Cypress Lake 2018
- St Johns River 2023
- Zigzag Canal 2025
Source: Florida Department of Environmental Protection (DEP), official data, checked 24 October 2026. For today's conditions see the DEP Algal Bloom Dashboard. No report doesn't mean a lake is safe: most water is only tested occasionally.