Keller beach is tested for bacterial levels weekly from April to October and twice a month from November to March. This map shows the sample sites across the beach. The East Bay Regional Park District works with the Contra Costa County Environmental Health Department in accordance with California Department of Public Health's "Guidance for Salt Water Beaches" to determine water quality at Keller Beach. Our stop light sign is used to display the relative water quality from our latest bacteriological tests.
Water Quality Stop Light Designations:
Please be advised there is always some level of risk when swimming in any water body. To have a fun and safe experience swimming in the parks, we encourage you to follow a few simple rules:
For more information contact the East Bay Regional Park District Water Management Department at (510) 544-2328