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Data

Providing current data for analysis, forecasting, and research

Providing current data for analysis, forecasting, and research

Basic hydrologic data collection, processing, analysis, dissemination, and archiving are major parts of the California Water Science Center program. Streamflow data, for example, are used for flood and water-supply forecasts, planning and design, river regulation, streamflow statistics, and research investigations. Much of the data are available on a near-real-time basis by satellite telemetry.

California Water Dashboard

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View California's real-time stream, lake, reservoir, precipitation, water quality, and groundwater stations in context with current weather and hazard conditions.

Current Conditions

California Groundwater Quality

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This interactive webmap plots water-quality data from domestic and public-supply wells sampled by the USGS for the California GAMA Priority Basin Project, and allows users to download datasets.

Water Quality Data

California Water Data

Filter Total Items: 434

Data for Per- and Polyfluoroalkyl Substances (PFAS) in groundwater samples collected by the California Groundwater Ambient Monitoring and Assessment Priority Basin Project, 2019-2023 Data for Per- and Polyfluoroalkyl Substances (PFAS) in groundwater samples collected by the California Groundwater Ambient Monitoring and Assessment Priority Basin Project, 2019-2023

The California Groundwater Ambient Monitoring and Assessment Program Priority Basin Project (GAMA-PBP) analyzed for per-and polyfluoroalkyl substances (PFAS) in groundwater samples collected from domestic and public drinking water supply wells in California. GAMA-PBP is a cooperative program between the U.S. Geological Survey and the California State Water Resources Control Board. This...
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California Water Science Center

Groundwater-quality data in the Kern County Domestic-Supply Aquifer Study Unit, 2022: Results from the California GAMA Priority Basin Project Groundwater-quality data in the Kern County Domestic-Supply Aquifer Study Unit, 2022: Results from the California GAMA Priority Basin Project

The U.S. Geological Survey collected groundwater samples from 33 wells used for domestic and small system drinking water supplies in Kern County, California in 2022. The wells were sampled for the Kern County Domestic-Supply Aquifer Study Unit of the State Water Resources Control Board Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project’s assessment of the...
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California Water Science Center

Estimated bedload transport rates at Rio Vista and Jersey Point, California, 2011-2020 Estimated bedload transport rates at Rio Vista and Jersey Point, California, 2011-2020

This data set contains estimates of bedload transport entering San Francisco Bay from the Sacramento-San Joaquin Delta. Bedload was estimated following the methods of van Rijn (1984) for the Sacramento River at Rio Vista (USGS 11455420) and the San Joaquin River at Jersey Point (USGS 11337190). The inputs the van Rijn (1984) equations included:bed-material particle size, bed-form...
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California Water Science Center

Phytoplankton Species Composition and Abundance in the Sacramento-San Joaquin River Delta: Microscopic Enumeration of USGS Samples, beginning in 2016 (ver. 1.1, December 2023) Phytoplankton Species Composition and Abundance in the Sacramento-San Joaquin River Delta: Microscopic Enumeration of USGS Samples, beginning in 2016 (ver. 1.1, December 2023)

This dataset contains taxonomy, density (cells/mL), and biovolume (μm3/mL) data for phytoplankton sampled across the Sacramento San Joaquin River Delta and San Francisco Bay (Bay-Delta) beginning in 2016. Whole water phytoplankton samples were collected intermittently during special projects and during routine visits to service continuous monitoring stations. Samples were preserved with...
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California Water Science Center

Basin Characterization Model (BCMv8) for California Coastal Basins - Monthly Historical (water years 1896-2019) and Future (water years 2006-2099) Climate and Hydrology Basin Characterization Model (BCMv8) for California Coastal Basins - Monthly Historical (water years 1896-2019) and Future (water years 2006-2099) Climate and Hydrology

This data release contains monthly 270-meter gridded Basin Characterization Model (BCMv8) climate inputs and hydrologic outputs for 17 California Coastal Basins (Eel River, Fort Bragg, Fort Ross, Klamath, Los Angeles, Mad River, Mattole, Napa Sonoma, Russian River, Salinas, San Diego, San Francisco Coastal South, Santa Clara River Valley, Santa Clara River Valley South Bay, Smith, South...
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California Water Science Center

Russian River Integrated Hydrologic Model (RRIHM): Watershed Data Russian River Integrated Hydrologic Model (RRIHM): Watershed Data

The Russian River Watershed (RRW) covers about 1,300 square miles (without Santa Rosa Plain) of urban, agricultural, and forested lands in northern Sonoma County and southern Mendocino County, California. Communities in the RRW depend on a combination of Russian River water and groundwater to meet their water-supply demands. Water is used primarily for agricultural irrigation, municipal...
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California Water Science Center

Fish distribution and tidal currents in the Upper San Francisco Estuary (ver. 3.0, March 2025) Fish distribution and tidal currents in the Upper San Francisco Estuary (ver. 3.0, March 2025)

This data release includes field data for fishes sampled through mid-water trawls and otter trawl methods from Suisun Bay, California to the mouth of the Sacramento River. These data were collected in August through September, 2022; October of 2023; and in September, 2024 as a part of a multi-year study of Suisun Dredging and Fish Distribution (SDFD). This data release includes...
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California Water Science Center

Electrical resistivity tomography in the Air Force Research Laboratory Northeast AFRL and Arroyos Groundwater Areas, Edwards Air Force Base, California 2022 Electrical resistivity tomography in the Air Force Research Laboratory Northeast AFRL and Arroyos Groundwater Areas, Edwards Air Force Base, California 2022

The U.S. Geological Survey (USGS) and Air Force Civil Engineering Center (AFCEC) have entered into a cooperative agreement to refine the hydrogeology in the Northeast AFRL and Arroyos groundwater areas of the Air Force Research Laboratory of Edwards Air Force Base. As part of these efforts, two electrical resistivity tomography (ERT) surveys- AFRL9 and AFRL10- were collected in the...
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California Water Science Center

Historical groundwater chemistry data compiled for the Poso Creek Oil Field and vicinity, Kern County, California Historical groundwater chemistry data compiled for the Poso Creek Oil Field and vicinity, Kern County, California

This digital dataset contains historical geochemical and other information for 100 samples of groundwater from 71 wells located within 3 miles of the Poso Creek Oil Field in Kern County, California. An additional 12 wells in the Poso Creek study area, but co-located within 3 miles of the adjacent Rosedale and Rosedale Ranch Oil Fields, were not included in this data release; these data...
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California Water Science Center

Assessing spatial variability of nutrients, phytoplankton, and related water quality constituents in the California Sacramento-San Joaquin Delta related to the 2015 installation of the False River Emergency Drought Barrier: 2015 and 2016 high-resolution m Assessing spatial variability of nutrients, phytoplankton, and related water quality constituents in the California Sacramento-San Joaquin Delta related to the 2015 installation of the False River Emergency Drought Barrier: 2015 and 2016 high-resolution m

This data release documents the spatial and temporal variability of nutrients and related water quality parameters at high spatial resolution in the western and central portion of the Sacramento-San Joaquin River Delta of California, USA. The data set includes water residence time, nitrate, ammonium, phosphate, dissolved organic carbon, temperature, conductivity, dissolved oxygen...
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California Water Science Center

Regional Water Table (2018) in the Mojave River and Morongo Areas, Southwestern Mojave Desert, California Regional Water Table (2018) in the Mojave River and Morongo Areas, Southwestern Mojave Desert, California

Data for groundwater-levels measured in 707 wells during January-July 2018 by the United States Geological Survey (USGS), the Mojave Water Agency (MWA), and other local water districts were compiled to construct a regional water-table shapefile for 2018. The regional water-table shapefile shows the elevation of the water table in and around the Mojave River and Morongo areas, in San...
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California Water Science Center

Regional Water Table (2020) in the Mojave River and Morongo Areas, Southwestern Mojave Desert, California Regional Water Table (2020) in the Mojave River and Morongo Areas, Southwestern Mojave Desert, California

Data for groundwater-levels measured in 616 wells during water year 2020 (November 2019-June 2020) by the United States Geological Survey (USGS), the Mojave Water Agency (MWA), and other local water districts were compiled to construct a regional water-table shapefile for 2020. The regional water-table shapefile shows the elevation of the water table in and around the Mojave River and...
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California Water Science Center
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