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Algal Blooms and Red Tide

Learn more about Red Tide

Learn more about the Caloosahatchee, Lake O and algal blooms

Learn more about current Caloosahatchee and estuary conditions and Lake Okeechobee flow.
Learn more about how the Caloosahatchee is impacted by its watershed, Lake Okeechobee and the greater Everglades.

Algae in the Caloosahatchee in June 2015
Algae in the Caloosahatchee in June 2013

Macroalgae on Sanibel, December 2012

Every year, algal blooms appear in the Caloosahatchee during the dry season because freshwater flows from Lake Okeechobee have been cut off. 

Algae in the Caloosahatchee in 2012.

The Health Alert for river water was downgraded to a caution on 7/26/11, as recent rains brought runoff from the water shed to the river.
Health Alert for River Water issued by Lee County, 6/7/11.  Glades and Hendry posted an alert on 6/10/11.

Anabaena and other algal species bloom in Caloosahatchee in June 2011

Takayama bloom in Lee and Collier counties September 2010

Microcystis and Anabaena bloom in the Caloosahatchee in July 2010