Health officials have closed a number of Metro Vancouver swimming beaches due to high levels of E. coli bacteria. Vancouver Coastal Health says English Bay, Trout Lake, Locarno Beach and Sandy Beach on Bowen Island are closed to swimmers because water samples contained E. coli levels that exceed recommended guidelines. Swimming beaches in Metro Vancouver may be required to close when a single sample finds E. coli levels exceeding 400 in 100 millilitres of water or the geometric mean of five days of samples surpasses 200 E. coli in 100 millilitres.