The San Francisco Water Supply system provides water to the city and surrounding areas through a network of reservoirs, aqueducts, and pipelines. The primary source of this water is the Hetch Hetchy Reservoir, located in the Yosemite National Park, which collects snowmelt from the Sierra Nevada mountains. Water is transported over 160 miles to reach San Francisco, ensuring a reliable supply for its residents. The system is managed by the San Francisco Public Utilities Commission, which oversees water quality and conservation efforts to maintain a sustainable water supply for the community.