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Blue-Green Algae Task Force: Alert public when algal toxins detected

How much toxicity does it take to make a blue-green algae bloom hazardous?

The World Health Organization says 10 parts per billion of the toxin microcystin is hazardous to touch. The federal Environmental Protection Agency sets the threshold at 8 parts per billion.

But the Florida Blue-Green Algae Task Force agreed Wednesday [July 30] people need to be warned when any toxins are in the water.

"A simple detection of toxins is enough to prompt a health alert," Florida Chief Science Officer Tom Frazer, who leads the panel, said during the Zoom meeting.

The task force was discussing whether Florida needs to establish a state threshold for hazardous levels of microcystin such as those used by the WHO and EPA and looking at signs developed by the Florida Department of Health and state Department of Environmental Protection to warn people of toxic algae blooms in water bodies.

"There's no safe exposure to toxins," said task force member James Sullivan, executive director of Florida Atlantic University's Harbor Branch Oceanographic Institute at Fort Pierce. "If there's a reliable detection (of toxins in the water), the number doesn't mean anything. To be the most cautious for the public, if you detect toxins, you put out an advisory."