Florida
Toxic algae in Polk County lakes
56 lakes and waterways in Polk County have harmful algal bloom reports in Florida's official data. The most recent entry is for Lake Echo: Florida's most recent sample from Lake Echo, on 29 December 2025 at Lake Echo - NW, found a bloom and no microcystin toxin was detected. Lake Crago, Lake Pierce and Tiger Lake and 7 more 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.
- Lake Echo Bloom seen
- Lake Summit No bloom seen
- Lake Crago Bloom seen
- Thomas Lake Bloom seen
- Lake Pierce Bloom seen
- Lake Hamilton East Bloom seen
- Reedy Lake Bloom seen
- Tiger Lake Bloom seen
- Parker Crago Canal No bloom seen
- Lake Van No bloom seen
- Lake Hancock Bloom seen
- Lake Rochelle No bloom seen
- Lake Parker Bloom seen
- Lake Bonny No bloom seen
- Lake Buffum Bloom seen
- Lake Cannon Bloom seen
- Lake Mariana Bloom seen
- Lake Gibson Bloom seen
- Scott Lake Bloom seen
- Lake Conine Bloom seen
- Lake Buckeye Bloom seen
- Old Lake Davenport No bloom seen
- Lake Weohyakapka No bloom seen
- Lake Haines Bloom seen
- Lake Whistler Bloom seen
- Lake Smart Bloom seen
- Lake Garfield Bloom seen
- Lake Hollingsworth Bloom seen
- Eagle Lake Bloom seen
- Lake Mattie No bloom seen
- Lake Ariana No bloom seen
- Lake Henry No bloom seen
- Lake Mariam Bloom seen
- Lake Otis Bloom seen
- Banana Lake Bloom seen
- Lake Deer Bloom seen
- Lake Idyl Bloom seen
- Lake Hunter Bloom seen
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.
- Lake Alfred 2023
- Lake Arietta 2017
- Lake Clinch 2020
- Lake Dell 2022
- Lake Eloise 2023
- Lake Eva 2018
- Lake Hartridge 2023
- Lake Howard 2023
- Lake Juliana 2023
- Lake Livingston 2022
- Lake Lulu 2021
- Lake Marion 2024
- Lake Mattie Canal 2022
- Lake Reedy 2022
- Lake Rosalie 2025
- Lake Silver 2023
- Little Lake Parker 2020
- Reclaimed Mine Lake 2020
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.