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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: 439

Laboratory-based optical measurements for water samples collected from Clear Lake, California Laboratory-based optical measurements for water samples collected from Clear Lake, California

Clear Lake, located within the Coast Range west of California's Central Valley, is the largest natural freshwater lake contained fully within the state. The lake has three arms: a large open-water region to the northwest (Upper Arm), a smaller and narrower region to the southeast (Lower Arm), and the smallest and narrowest region to the east (Oaks Arm). Water quality in Clear Lake is...
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California Water Science Center

Sorption Coefficients (Kd) for Perfluorooctanoic acid (PFOA) and Perfluorooctanesulfonic acid (PFOS), and supporting soil properties at a 250-meter resolution, based on 30-meter resolution data from the Polaris Soils database Sorption Coefficients (Kd) for Perfluorooctanoic acid (PFOA) and Perfluorooctanesulfonic acid (PFOS), and supporting soil properties at a 250-meter resolution, based on 30-meter resolution data from the Polaris Soils database

Per- and polyfluoroalkyl substances (PFAS) chemicals are known to strongly sorb onto soils when being transported downward through the vadose zone. The degree to which this sorption occurs depends on the length of the specific PFAS molecular chain and the properties of the soil. The properties with greatest influence on the soils PFAS sorption potential are percent silt and clay, and...
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California Water Science Center

Water Chemistry Data for Samples Collected at Groundwater Sites in the Santa Fe Springs Oil Field Study Area, April 2021 to April 2024, Los Angeles County, California Water Chemistry Data for Samples Collected at Groundwater Sites in the Santa Fe Springs Oil Field Study Area, April 2021 to April 2024, Los Angeles County, California

The California State Water Resources Control Board (State Water Board) initiated the Oil and Gas Regional Monitoring Program (RMP) to assess effects of oil and gas development on groundwater designated for any beneficial use. The U.S. Geological Survey (USGS) is the technical lead in conducting the RMP through the California Oil, Gas, and Groundwater (COGG) Program, working in...
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California Water Science Center

Data for evaluating sustainable management of groundwater-quality and trends for groundwater basins in the Gilroy-Hollister Valley and northern San Joaquin Valley, California Data for evaluating sustainable management of groundwater-quality and trends for groundwater basins in the Gilroy-Hollister Valley and northern San Joaquin Valley, California

This data release documents five tables and one geographic information systems shapefile feature used to evaluate groundwater quality and concentration trends for groundwater basins in the Gilroy-Hollister Valley and northern San Joaquin Valley, California. This dataset provides a framework for evaluating groundwater quality data at the spatial scale of groundwater basins and the...
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California Water Science Center

Potential Explanatory Variables for Groundwater Quality in California Potential Explanatory Variables for Groundwater Quality in California

This data release codifies and attributes values for potential explanatory factors to groundwater well locations and to groundwater basins in California. The groundwater sites are 282,000 wells that have water-quality data and are listed in the California State Water Resources Control Boards' Groundwater Ambient Monitoring and Assessment Program Groundwater Information System (GAMA GIS)...
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California Water Science Center

Model Archive Summary and Time-Series Suspended-Sediment Concentrations Computed from a Surrogate Turbidity Regression at USGS station 11313405 Old River at Bacon Island, CA (2010-2019) Model Archive Summary and Time-Series Suspended-Sediment Concentrations Computed from a Surrogate Turbidity Regression at USGS station 11313405 Old River at Bacon Island, CA (2010-2019)

Continuous 15-minute time-series suspended-sediment concentration data computed from instream turbidity data. Turbidty data is managed by California Department of Water Resources (CDWR) using a YSI 6-series multi-parameter water quality sonde. Complete methods for turbidity data collection are described in attached methods document.
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California Water Science Center

Model Archive Summary for Turbidity Derived Suspended-Sediment Concentrations at 11455350 Cache Slough at Ryer Island, Ca (2013-2018) Model Archive Summary for Turbidity Derived Suspended-Sediment Concentrations at 11455350 Cache Slough at Ryer Island, Ca (2013-2018)

Continuous 15-minute time-series suspended-sediment concentration (SSC) data, representative of the cross section, were computed from instream turbidity data and are acceptable to compute sediment transport. Instream turbidity data were collected at the same location of the ADVM. Sediment samples were collected along the channel transect shown in the channel cross section information...
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California Water Science Center

Model Archive Summary and Time-Series Suspended-Sediment Concentrations Computed from a Surrogate Turbidity Regression at USGS station 11337080 Threemile Slough near Rio Vista, CA (2015-2019) Model Archive Summary and Time-Series Suspended-Sediment Concentrations Computed from a Surrogate Turbidity Regression at USGS station 11337080 Threemile Slough near Rio Vista, CA (2015-2019)

Continuous 15-minute time-series suspended-sediment concentration data computed from instream turbidity data. Turbidity data is managed by California Department of Water Resources (CDWR) using a YSI EXO multi-parameter water quality sonde. Complete methods for turbidity data collection are described in attached methods document.
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California Water Science Center

Model Archive Summary No. 2 for Turbidity Derived Suspended-Sediment Concentrations at USGS Station 11447903; Georgiana Slough Near Sacramento River, California (2015-2021) Model Archive Summary No. 2 for Turbidity Derived Suspended-Sediment Concentrations at USGS Station 11447903; Georgiana Slough Near Sacramento River, California (2015-2021)

Model archive summary (MAS) describing the development of a continuous 15-minute suspended-sediment concentration (SSC) time series regression model for the site: Georgiana Slough Near Sacramento River (U.S. Geological Survey (USGS) site # 11447903). The SSC time series is computed from instream turbidity data that is managed by the USGS using a YSI EXO multi-parameter water quality...
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California Water Science Center

Model Archive Summary for Turbidity Derived Suspended-Sediment Concentrations at 11312672 Victoria Canal Near Byron, Ca Model Archive Summary for Turbidity Derived Suspended-Sediment Concentrations at 11312672 Victoria Canal Near Byron, Ca

Continuous 15-minute time-series suspended-sediment concentration (SSC) data computed from instream turbidity data. Turbidity data is managed by California Department of Water Resources (CDWR) using a YSI-6-series multi-parameter water quality sonde. Complete methods for turbidity data collection are described in attached methods document.
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California Water Science Center

Model Archive Summary for Turbidity Derived Suspended-Sediment Concentration at 11455420 Sacramento River at Rio Vista, Ca (2010-2014) Model Archive Summary for Turbidity Derived Suspended-Sediment Concentration at 11455420 Sacramento River at Rio Vista, Ca (2010-2014)

This Model Archive Summary (MAS) describes the development of a turbidity derived suspended-sediment concentration (SSC) time-series computation model. The MAS includes all the methods and techniques used to develop the model for USGS station 11455420 Sacramento River at Rio Vista, Ca. The time-series suspended-sediment concentration data are representative of the cross section and are...
By
California Water Science Center

Model Archive Summary for Turbidity Derived Suspended-Sediment Concentrations at 11455420 Sacramento River at Rio Vista, California (2015-2020) Model Archive Summary for Turbidity Derived Suspended-Sediment Concentrations at 11455420 Sacramento River at Rio Vista, California (2015-2020)

This Model Archive Summary (MAS) describes the development of a turbidity derived suspended-sediment concentration (SSC) time-series computation model. The MAS includes all the methods and techniques used to develop the model for USGS stations 11455420 Sacramento River at Rio Vista, Ca. The time-series suspended-sediment concentration data are representative of the cross section and are...
By
California Water Science Center
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