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USGS - science for a changing world

Due to a lapse in appropriations, the majority of USGS websites may not be up to date and may not reflect current conditions. Websites displaying real-time data, such as Earthquake and Water and information needed for public health and safety will be updated with limited support. Additionally, USGS will not be able to respond to inquiries until appropriations are enacted. For more information, please see www.doi.gov/shutdown.


Photo of Owen measuring streamflow.

Science Highlights

Low-flying Helicopter in Southern San Joaquin Valley Surveying Groundwater and Geology

20 November 2018

A low-flying helicopter under contract to the U.S. Geological Survey, in cooperation with the California State Water Resources Control Board, has begun collecting and recording geophysical measurements for purpose of groundwater salinity and aquifer mapping.

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2018 Bay-Delta Science Conference: Our Estuary at an Intersection

30 August 2018

The San Francisco Bay and Sacramento-San Joaquin Delta estuary provides water to more than 25 million California residents, farmlands, and key fish and wildlife habitats. Continuing to meet these demands requires science that informs decision-making for long-term solutions. Providing this science is the focus for the 10th Biennial Bay-Delta Science Conference, being held September 10-12, 2018, in Sacramento, California. This year’s theme is: Our Estuary at an Intersection.

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New Research Supports California's Effort to Curb Greenhouse Gases Using Soils Management

27 August 2018

Governor Edmund G. Brown Jr. today announced the release of new science and planning tools to support California’s continued leadership on actions to address climate change and safeguard the state’s people, economy and resources.

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USGS Interdisciplinary Science Contributes to Native Fish Ecology Efforts in the Delta

25 July 2018

With the development of the Central Valley (CVP) and State Water (SWP) projects, the natural flow of the Sacramento-San Joaquin Delta has been reengineered to provide water for California’s growing population and agricultural needs. These changes have drastically reduced natural wetlands, affecting the habitat of native fish species, including the threatened Delta Smelt. To address the situation, joint operations of the CVP and SWP must balance human water demands on the Delta with protection of its fragile ecosystem and species of concern, especially those listed as threatened or endangered under state and federal laws.

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Webinar Series on "Mercury in Reservoirs"

01 February 2018

The U.S. Geological Survey (USGS), in collaboration with the California Water and Environmental Modeling Forum (CWEMF), presented a series of free webinars on mercury in reservoirs. Seven webinars were given from February 14 through May 2, 2018.

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Contact Information

Mark Desio
Media Inquiries and Interviews
(916) 278-3111

Steve Ackley
Outreach and Special Events
Office: (916) 278-3130
Cell: (916) 431-8359

Gabriel Lopez
USGS Data and Report Requests
(916) 278-3026

Laurel Rogers
Communications Chief
Office: (619) 225-6104
Cell: (619) 980-6527


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* DOI and USGS link and privacy policies apply.