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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: 390

Fine Scale Historical Climate and Hydrology for Sentinel Monitoring Locations in California using the Basin Characterization Model (BCM) Fine Scale Historical Climate and Hydrology for Sentinel Monitoring Locations in California using the Basin Characterization Model (BCM)

This data release includes downscaled climate inputs and hydrologic outputs from 41 Basin Characterization Models (BCM) version 8 (v8), described in Flint and others (2021), with a 10 by 10-meter spatial resolution at monthly intervals from water years 1896 to 2023. Forty-one (41) models were developed for sentinel monitoring locations in Wildlife Areas and Ecological Reserves in...
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California Water Science Center

Data and model for mapping groundwater total dissolved solids at the San Ardo Oil Field, Monterey County, California, USA Data and model for mapping groundwater total dissolved solids at the San Ardo Oil Field, Monterey County, California, USA

The U.S. Geological Survey (USGS) compiled and analyzed data for mapping groundwater total dissolved solids (TDS) at the San Ardo Oil Field in Monterey County, California. Data include groundwater TDS and bicarbonate concentration from oil well and groundwater well samples, formation resistivity from borehole geophysical logs, porosity from well logs and rock core samples, temperature...
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California Water Science Center

Repeat microgravity data from Anza Valley, California, 2019-2023 Repeat microgravity data from Anza Valley, California, 2019-2023

This dataset represents the network-adjusted results of relative- and absolute-gravity surveys performed from 2019 to 2023 in and near Anza Valley, California. Relative surveys were done using a Zero Length Spring, Inc. Burris relative-gravity meter. Absolute-gravity surveys were done using a Micro-g LaCoste, Inc. A-10 absolute-gravity meter. The effect of solid Earth tides and ocean...
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California Water Science Center

Quartz Valley Geologic Framework and Borehole Data Quartz Valley Geologic Framework and Borehole Data

The Quartz Valley Geologic Framework uses geologic data gathered from previous publications (Mack, 1958) and airborne electromagnetic (AEM) surveys (California Department of Water Resources, 2024) in conjunction with the well log database presented in this data release to create an understanding of the extents and thicknesses of geologic units including channel alluvium, alluvium and...
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California Water Science Center

Groundwater-quality data in the Western Slope of the Sierra Nevada Domestic-Supply Aquifer Study Unit, 2024: Results from the California GAMA Priority Basin Project Groundwater-quality data in the Western Slope of the Sierra Nevada Domestic-Supply Aquifer Study Unit, 2024: Results from the California GAMA Priority Basin Project

The U.S. Geological Survey collected groundwater samples from 38 wells used for domestic and small system drinking water supplies in the south-central Sierra Nevada region, California in 2023 and 2024. The wells were sampled for the Western Slope of the Sierra Nevada domestic-supply aquifer study unit of the California Groundwater Ambient Monitoring and Assessment Program Priority Basin...
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California Water Science Center

Fish Observations During Delta Smelt Experimental Releases Inferred from ARIS Sonar Fish Observations During Delta Smelt Experimental Releases Inferred from ARIS Sonar

This dataset includes post-processed data for underwater fish observations by using Acoustic Resolution Imaging Sonar technology in Montezuma Slough, Sacramento River, and in the Sacramento Deep Water Shipping Channel in the Sacramento-San Joaquin Delta, California, USA. This data release includes sample data associated with each video file collected, swimming behavior of groups of...
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California Water Science Center

Cyanotoxins in the California Sacramento-San Joaquin Delta: Fixed Station Solid Phase Adsorption Toxin Tracking (SPATT) samplers Cyanotoxins in the California Sacramento-San Joaquin Delta: Fixed Station Solid Phase Adsorption Toxin Tracking (SPATT) samplers

This dataset is comprised of cyanotoxin concentrations in extracts from solid phase adsorption toxin tracking (SPATT) samplers deployed at fixed sampling stations in the Sacramento-San Joaquin Delta, beginning in 2020. SPATT samplers are a form of passive sampler constructed of adsorbent resin beads that concentrate cyanotoxins over time. Cyanotoxin congeners were measured from SPATT...
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California Water Science Center

Velocity mapping using moving boat and side-looking acoustic Doppler current profilers at False River, CA in February and March 2022 Velocity mapping using moving boat and side-looking acoustic Doppler current profilers at False River, CA in February and March 2022

Moving boat (MB) acoustic Doppler current profile (ADCP) measurements collected at discrete cross-sections over an ~1.5 kilometer stretch of False River, near the San Joaquin River, CA. These data were collected on four separate days in March of 2022, and are georeferenced and depth-averaged. Side looking (SL) ADCP data was also georeferenced to provide an index for the moving boat ADCP...
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California Water Science Center

Up-looking acoustic Doppler current profiler data from Suisun Bay and lower Sacramento River, CA from June 2021 - August 2023 Up-looking acoustic Doppler current profiler data from Suisun Bay and lower Sacramento River, CA from June 2021 - August 2023

These data along with continuous monitoring at several locations (data provided through NWIS) are used to monitor bottom salinity and tidal currents associated with a project to better monitor X2 (position of 2 PSU [Practical Salinity Units] isohaline) in the lower Sacramento River and Suisun Bay, CA. Links to NWIS sites are provided in the associated web links under 'Related External...
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California Water Science Center

Growth, survival, and tag retention results from PIT tagging Santa Ana Sucker in a mesocosm experiment Growth, survival, and tag retention results from PIT tagging Santa Ana Sucker in a mesocosm experiment

The Santa Ana Sucker (Pantosteus santaanae) is a federally threatened species of ray-finned fishes endemic to the Santa Ana, San Gabriel, and Los Angeles Rivers in southern California. Seasonal limitations on conventional sampling and inconsistencies in survey methodologies have led to an incomplete understanding of Santa Ana Sucker population dynamics. Therefore, alternative sampling...
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California Water Science Center

Stable Isotope Concentrations in Native Fish Tissues Sampled on November 19, 2019, from the Santa Ana River, near Colton, California Stable Isotope Concentrations in Native Fish Tissues Sampled on November 19, 2019, from the Santa Ana River, near Colton, California

This dataset includes carbon-13 (d13C) and nitrogen-15 (d15N) stable isotope analysis from muscle, fin, and eye lens (laminae) tissues from Santa Ana sucker (Pantosteus santaanae) and arroyo chub (Gila orcutti) collected by the Riverside Corona Resource Conservation District (RCRCD) during a fish salvage effort in the Santa Ana River, near Colton, California, USA, on November 19, 2019...
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California Water Science Center

Geochemical data for selected streams in the Clear Lake basin, Lake County, California Geochemical data for selected streams in the Clear Lake basin, Lake County, California

This dataset includes water-quality data for samples collected at sixteen sites in the Clear Lake Drainage Basin, Lake County, California, between November 2018 and March 2024. Sampling in the reach of the Scotts Creek drainage below the confluence with South Fork Scotts Creek (USGS stations 11448800 and 390236122575901) was done during November 2018 to May 2019 (water year 2019; water...
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California Water Science Center
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