San Francisco Bay-Delta
The Bay-Delta is a nexus for challenging issues about water, ecosystems, and human use. USGS science helps address key problems and uncertainties.
An underwater view of periphyton growing on rocks near the shore of Lake Tahoe with a reflection of the rocks on the water surface
The California-Great Basin includes California, Nevada, and part of Oregon. The Regional Office, headquartered in Sacramento, provides Center oversight and support, facilitates internal and external collaborations, and works to further USGS strategic science directions. Our scientists do a broad array of research and technical assistance throughout the U.S. and across the globe.