Shadow Cliffs beaches have been closed due to high levels of E. coli bacteria measurement.
East Bay Regional Park District water management supervisor Hal MacLean said bacteria results did not meet state health standards.
The East Bay Regional Park District (EBRPD) closed the south beach Wednesday after bacteria results did not meet state health standards, and it extended the closure to the north beach on Friday after test results found water samples from there also exceeded allowable bacteria levels for swimming and other water contact, MacLean said.
"The results did not come back in our favor," said MacLean, adding that south beach's bacteria level was 6100 and north beach's was 1000 as of noon Friday.
The daily maximum level allowed under state standards is 235 (a figure that represents bacterial density per 100 mL of water).
MacLean said the low water level and not watering the lawn could be among the contributing factors leading to the high readings.
"We haven't been watering the lawn to conserve water," he said. "So instead of the geese congregating on the lawn, they're congregating on the beach."
The park district will continue to sample the water daily until the beaches are safe to reopen, MacLean said. In addition, they are talking to the health department to see "what it will take to get it reopened," he added.
The rest of Shadow Cliffs is open, including the boating-launch area.
However, MacLean stressed the use of typical hygiene practices.
"Don't get water in your mouth. Wash your hands. Be cautious," he said.
The park district website has provided the public with a rating system of the water quality.