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Two Alameda County lakes that were closed to swimmers because of the presence of blue-green toxins will reopen on Saturday.
Napa Valley health officials are urging people planning to go swimming or boating to avoid close contact with lakes and other bodies of water containing blue-green algae.
Lake Temescal closed to swimmers due to the detection of a blue-green algae bloom Monday.
San Francisco Bay mussels contain high levels of a toxin that can cause liver damage, according to a new study.
Two San Jose lakes were closed Thursday and remain closed because algae found in the lakes can kill dogs.
The Quarry Lakes in Fremont reopened for swimming this weekend after closing in March due to toxic algae.
Lake Anza in Berkeley has been closed for swimming due to a bloom of toxic blue-green algae.
The East Bay Regional Park District announced Monday it has closed Oakland's Lake Temescal for swimming.
The Quarry Lakes Regional Recreational Area in Fremont is closed for swimming through at least Wednesday.
Three dogs have died after they were exposed to Blue-Green Algae blooms at Lake Chabot Regional Park.