The San Francisco Water System is a complex network that supplies water to the city and surrounding areas. It primarily sources water from the Hetch Hetchy Reservoir, located in the Sierra Nevada Mountains. This system includes pipelines, aqueducts, and treatment facilities that ensure clean and reliable water delivery. In addition to the Hetch Hetchy supply, the system also incorporates local sources, such as groundwater and reservoirs within the Bay Area. The San Francisco Public Utilities Commission manages the water system, focusing on sustainability and infrastructure maintenance to meet the needs of residents and businesses.