PALATKA, Fla., May 11, 2006 — Blue-greenalgae samples taken from the St. Johns River in Clay, St. Johns and Putnamcounties this week show only faint concentrations of algal toxins.

None of the six samples showed levels of algal toxins exceedingWorld HealthOrganization (WHO) recommended guidelines of 10 parts per billion for recreationalactivities. Samples were taken from Crescent Lake, the Lake George outlet tothe St. Johns River, the river in Palatka, at Racy Point in St. Johns County,and at Bayard Conservation Area, south of the Shands Bridge.

The greatest concentration of algal toxins was less than two parts per billion,found in a scum sample taken at the railroad bridge over Rice Creek.

Samples collected by St. Johns River Water Management District staff wereanalyzed by a private lab and identified as predominantly Anabaena,a freshwater blue-green algae thatis bright green in color and causes an unpleasantodor and taste.

In addition to producing toxins, algal blooms block sunlight from reachingaquatic plants, deplete dissolved oxygen, and compromise the survival of fishand other wildlife. Primary problems associated with toxins from blue-greenalgae such as Anabaena include damage to the nervous system or liverof animals that ingest the toxins.

Throughout the summer — peak months for algal proliferation — Districtscientists will collect samples at routine District water quality monitoringstations and also from areas observed during routine fieldwork that have visibleconcentrations of algae, or surface scums. When data show toxins, those datawill be released to media and local health departments and state health, wildlifeand environmental protection agencies.

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