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The California Water Science Center has adjusted activities in response to guidance concerning the global COVID-19 pandemic. We will carry on the work of the USGS, while also maintaining the health and safety of our employees and community.  Based on direction from the White House, the CDC, and state and local authorities, we are shifting to a virtual mode. 

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Water Research Projects

Water Research Projects

Over 100 research projects addressing California's key water issues including: long-term water supply and availability, water quality, droughts and floods, climate change, aquatic ecology, the Delta, management of watersheds and groundwater.

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Partnering with Us

Partnering with Us

The USGS partners with local, state, and other federal agencies to provide scientific information needed by water-resources managers across the Nation.

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California Water Data

Basic hydrologic data collection, processing, analysis, dissemination, and archiving are major parts of the California Water Science Center program.

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Current California Streamflow Conditions

California Runoff

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California Post-Fire Debris-Flow Maps

California Water-Quality Mapper

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News

Date published: September 18, 2020

How Changing Climate Will Impact the Flow of Sediment to the San Francisco Bay‐Delta

The health of the San Francisco Bay‐Delta depends on a sediment supply that has been recently declining due to sediment trapping in upstream reservoirs. Reduced sediment supply increases water clarity in the Bay-Delta, which in turn influences ecological processes and aquatic life.

Date published: September 1, 2020

Scientists Collect Water Quality Data Prior to Wastewater Treatment Plant Upgrades

The Sacramento Regional County Sanitation District (Regional San) is currently completing major upgrades to its wastewater treatment plant. In anticipation of these upgrades, USGS scientists are gathering data to establish baselines for current nutrient levels and dynamics in the Sacramento-San Joaquin Delta (Delta). 

Date published: August 25, 2020

USGS Participation in Annual Lake Tahoe Summit

The USGS Nevada and California Water Science Centers participate in annual Lake Tahoe Summit

Publications

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Year Published: 2020

Influenza A viruses remain infectious for more than seven months in northern wetlands of North America

In this investigation, we used a combination of field- and laboratory-based approaches to assess if influenza A viruses (IAVs) shed by ducks could remain viable for extended periods in surface water within three wetland complexes of North America. In a field experiment, replicate filtered surface water samples inoculated with duck swabs were...

Ramey, Andrew M.; Reeves, Andrew B.; Drexler, Judith Z.; Ackerman, Joshua T.; De La Cruz, Susan E. W.; Lang, Andrew S.; Leyson, Christina; Link, Paul T.; Prosser, Diann; Robertson, Gregory J.; Wight, Jordan; Youk, Sungsu; Spackman, Erica; Pantin-Jackwood, Mary; Poulson, Rebecca L.; Stallknecht, David E.

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Year Published: 2020

Water Quality of groundwater used for public supply in principal aquifers of the western United States

Groundwater provides nearly half of the Nation’s drinking water. As the Nation’s population grows, the importance of (and need for) high-quality drinking-water supplies increases. As part of a national-scale effort to assess groundwater quality in principal aquifers (PAs) that supply most of the groundwater used for public supply, the U.S....

Rosecrans, Celia Z.; Musgrove, MaryLynn
Rosecrans, C.Z., and Musgrove, M., 2020, Water Quality of groundwater used for public supply in principal aquifers of the western United States: U.S. Geological Survey Scientific Investigations Report 2020–5078, 142 p., https://doi.org/10.3133/sir20205078.

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Year Published: 2020

Detection and measurement of land subsidence and uplift using Global Positioning System surveys and interferometric synthetic aperture radar, Coachella Valley, California, 2010–17

Groundwater has been a major source of agricultural, recreational, municipal, and domestic supply in the Coachella Valley of California since the early 1920s. Pumping of groundwater resulted in groundwater-level declines as large as 50 feet (ft) or 15 meters (m) by the late 1940s. Because of concerns that the declines could cause land subsidence,...

Sneed, Michelle; Brandt, Justin T.
Sneed, M., and Brandt, J.T., 2020, Detection and measurement of land subsidence and uplift using Global Positioning System surveys and interferometric synthetic aperture radar, Coachella Valley, California, 2010–17: U.S. Geological Survey Scientific Investigations Report 2020–5093, 74 p., https://doi.org/10.3133/sir20205093.