The Department of Water Resources (DWR) closed Upper Castaic Lake Monday due to an elevated danger algal bloom advisory. DWR is urging people to avoid physical contact with water at Castaic Lake in Los Angeles County until further notice due to the presence of toxic blue-green algae. People should also avoid eating fish or shellfish from the lake.
Boating and water-contact recreation and sporting activities, including shoreline fishing, are not considered safe at upper Castaic Lake due to potential adverse health effects. Castaic Lake State Recreation Area remains open to land-based recreation. Castaic Lagoon, also known as lower Castaic Lake, has no algal bloom advisory and is open to non-motorized boating.
Exposure to toxic blue-green algae, also known as cyanobacteria, can cause eye irritation, allergic skin rash, mouth ulcers, vomiting, diarrhea, and cold- and flu-like symptoms. Pets can be especially susceptible because they tend to drink while in the water and lick their fur afterwards. Keep pets away from the water.
For latest conditions and danger advisory information, go to Harmful Algal Bloom website.