San Francisco
United StatesSafe to Drink
Quality Score85%
About San Francisco
San Francisco, located in northern California, is a cultural and financial hub known for its iconic Golden Gate Bridge, cable cars, and colorful Victorian houses.
Water Situation
San Francisco's tap water primarily comes from the Hetch Hetchy Reservoir, which is located in the Sierra Nevada mountains. The water is known for its high quality and clarity due to minimal filtration from the granite basin it flows through. Over the years, San Francisco has made efforts to maintain its water quality by investing in infrastructure improvements and ensuring rigorous testing to meet health and safety standards.