The Florida Department of Health said it found blue green algae in parts of Christopher Creek and the St. Johns River in the San Marco area.
Experts say not to swim or boat around visible blooms and keep pets away too.
Toxins produced by the blooms can cause rashes, stomach cramps, nausea, diarrhea and respiratory irritation.
This is the second warning like this in our area in about a week. The first was for the Mandarin area.
The St. Johns Riverkeeper and researchers at Jacksonville University took water samples in that area on Wednesday.
They found very low toxin levels, but say river conditions change constantly, so algae growth can change fast too.
If you see an algae bloom in your area, you can fill out this form from the Florida Fish and Wildlife Conservation Commission.
To begin a report, just check “yes.” You’ll also have to say when you saw it and that you’re reporting as a citizen.
Then it will take you to a page that will ask a lot of questions about wildlife, how large the bloom is and shows photos to help you with reporting. You can also call the Florida Department of Environmental Protection at 855-305-3903 to report a bloom.
Learn more about the latest testing results (July 30 – August 5) by the FDEP and St. Johns River Water Management District (SJRWMD) for the St. Johns River:
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