New buildings will need to collect and reuse much more water than what is required for existing buildings, after the San Francisco Board of Supervisors approved new regulations Tuesday.

The ordinance more than doubles the amount of water that new large buildings will be required to collect and reuse on site, said Supervisor Rafael Mandelman, its author. He said it also directs the San Francisco Public Utilities Commission to come up with a plan for expanding The City’s supply and use of recycled water.