SAN FRANCISCO - The sale and distribution of plastic water bottles on public property in San Francisco will soon be banned following a unanimous vote today by the city's Board of Supervisors. 

The legislation from board president David Chiu, which targets water bottles of up to 21 ounces, will take effect Oct. 1, with certain exemptions until 2016 for food trucks and outdoor events where a reliable on-site water supply is not yet feasible.  The legislation will apply to all events on city property starting in 2018.