// Risk Intelligence
| Risk Score | 8 / 10 High |
| Facility Type | 💧 Water Treatment Facility |
| Operator / Branch | San Francisco Public Utilities Commission |
| Host County | San Francisco County CA |
| Nearest City | Washington DC |
| Primary Risk Radius | 5 miles |
| Secondary Risk Radius | 25 miles |
// Strategic Significance
The San Francisco Public Utilities Commission delivers water to 2.7 million Bay Area residents via the Hetch Hetchy aqueduct system originating in Yosemite National Park. The 167-mile aqueduct crosses multiple active earthquake faults including the Calaveras and Hayward Faults. A major Bay Area earthquake could rupture the Hetch Hetchy aqueduct at multiple points leaving San Francisco and the Bay Area without water. The 1906 earthquake ruptured San Francisco water mains enabling the fires that destroyed most of the city.
// Civilian Impact Assessment
San Francisco County with 875,000 city residents and 2.7 million Bay Area residents. The Hetch Hetchy aqueduct crosses active earthquake faults. The 1906 earthquake demonstrated catastrophic water system failure enabling city-destroying fires. A major Hayward Fault earthquake could rupture the aqueduct at multiple points.
// Evacuation & Shelter Guidance
I-280, US-101, Hetch Hetchy Aqueduct, Bay Area. San Francisco Emergency Management coordinates earthquake water system failure wildfire and drought protocols.