How is USGS helping managers understand and track water quality?
How does USGS science support Bay-Delta surface water management?
How is USGS working to understand natural hazards in the Delta?
San Francisco Bay and Sacramento-San Joaquin Delta Estuary
The San Francisco Bay/Sacramento-San Joaquin Delta is one of the largest estuaries in the United States. It provides water to more than 25 million California residents, farmlands, and key fish and wildlife habitats. To help ensure the health of this crucial estuary, the U.S. Geological Survey provides science essential to address issues of importance to our partners and the public.