Unified Interior Regions


The Southwest Region includes California, Nevada, and Arizona. The Regional Office, headquartered in Sacramento, provides Center oversight and support, facilitates internal and external collaborations, and works to further USGS strategic science directions.

States L2 Landing Page Tabs

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Image: Grand Canyon

Grand Canyon

Grand Canyon.

Image: Taking Readings in the Grand Canyon

Taking Readings in the Grand Canyon

USGS Aquatic Ecologist, Ted Kennedy, getting a reading off the flow meter.