The Pulgas Water Temple is a stone structure in Redwood City, California, United States, designed by architect William G. Merchant. It was erected by the San Francisco Water Department to commemorate the 1934 completion of the Hetch Hetchy Aqueduct and is located at the aqueduct's terminus; originally water flowed through a vault under the temple itself, but new requirements for treatment require it to be diverted to a plant nearby.