PLEASANTON -- Shadow Cliffs Park, closed to swimmers since last week following high readings of E. coli bacteria, will reopen for swimming on Wednesday, East Bay Regional Park District officials said.

According to the district, water quality tests conducted at the lake Monday found bacterial levels had significantly improved over the weekend, likely due to a combination of a biodegradable algaecide and the installation of fencing to keep geese from congregating on the beach.

The lake was closed to swimmers on July 25 on recommendation of the Alameda County Environmental Health Department. District officials blamed drought conditions, lower than normal water levels and an abundance of geese populating the water for the harmful bacterial presence.

Meanwhile, Oakland's Lake Temescal remains closed to swimmers due to a buildup of toxic blue-green algae in the water, the district said. The lake won't reopen until tests reveal the algae's toxin has been reduced to acceptable levels.

Contact Jeremy Thomas at 925-847-2184. Follow him at Twitter.com/jet_bang.



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