Warning signs for algae went up Monday at El Dorado ... that bacteria doesn't always reach toxicity levels that are harmful. Everyone needs to be careful and follow public health advisories ...

On Monday, the city said that it had posted cautionary signs at El Dorado Beach warning of potential harmful algae in the water. The signs advise swimmers to stay away from any algae or scum they ...

SANTA BARBARA — Sea lions are stranding themselves on a long stretch of the California coast and showing signs that they may have been poisoned by a bloom of harmful algae, experts said Thursday.

Algal blooms can be harmful to humans, pets and other animals. The Geneva Lake Environmental Agency, an inter-municipal group that manages the lake, posted a number of health warnings. SIGN UP ...

The health department says there are high levels of harmful algal blooms or HABs in several of the state's swimming areas. Some of the affected areas include Alloway Creek, in Salem county ...