Skip to main content
U.S. flag

An official website of the United States government

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

screenshot of the California Water Dashboard

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

screenshot of the user interface

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: 425

Water Chemistry Data for Samples Collected at Groundwater Sites in the Midway-Sunset and Buena Vista Oil Fields Study Area, March 2018 to April 2019, Kern County, California Water Chemistry Data for Samples Collected at Groundwater Sites in the Midway-Sunset and Buena Vista Oil Fields Study Area, March 2018 to April 2019, Kern 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 (GW) 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...
By
California Water Science Center

Laboratory optical measurements to assess long-term changes in water-extractable soil organic matter, U.S. Great Plains Laboratory optical measurements to assess long-term changes in water-extractable soil organic matter, U.S. Great Plains

Carbon (C) and nitrogen (N) extracted from soil with water are associated with available plant nutrients and microbial activity, but information about how C and N have changed over time in the U.S. Great Plains is sparse. Optical measurements of absorbance and fluorescence were used to compare dissolved organic matter (DOM) extracted from historic (1947) and contemporary (2018) soil...
By
California Water Science Center

Paso Robles Hydrologic Model: Future Climate Data Paso Robles Hydrologic Model: Future Climate Data

This digital dataset contains the gridded future climate data for the same modeled extent as the Paso Robles Groundwater Basin Model (GEOSCIENCE and Todd Groundwater, 2015). The monthly climate data for the Paso Robles Hydrologic Model are based on the Salinas and Carmel River Basins Study (SCRBS) future climate scenarios (Henson and others, 2024). SCRBS considers one baseline climate...
By
California Water Science Center

Model Archive Summary for Turbidity Derived Suspended-Sediment Concentrations at USGS Station 11455335; Sacramento River Deep Water Ship Channel near Rio Vista, California (2015 - 2021) Model Archive Summary for Turbidity Derived Suspended-Sediment Concentrations at USGS Station 11455335; Sacramento River Deep Water Ship Channel near Rio Vista, California (2015 - 2021)

Continuous 15-minute time-series suspended-sediment concentration (SSC) data computed from USGS instream turbidity data using a YSI EXO multi-parameter water quality sonde for the Sacramento River Deep Water Ship Channel near Rio Vista, California station (DWS; USGS #11455335). A Model Archive Summary (MAS) describes the development of a continuous 15-minute SSC time-series regression...
By
California Water Science Center

Salinas Valley Hydrologic System: Land Use Data Salinas Valley Hydrologic System: Land Use Data

This digital dataset contains the land use data used for both the Salinas Valley Hydrologic Models (SVHM): the Salinas Valley Watershed Model (SVWM), the Salinas Valley Integrated Hydrologic Model (SVIHM), and Salinas Valley Operational Model (SVOM)). Land use data were compiled from available state, local, and federal datasets. Available multi-year composite land use data were...
By
California Water Science Center

Salinas Valley Watershed Model: Application of Hydrologic Simulation Program-FORTRAN (HSPF) Salinas Valley Watershed Model: Application of Hydrologic Simulation Program-FORTRAN (HSPF)

This model archive contains the datasets, procedures, and necessary program code used to describe the Salinas Valley Watershed Model (SVWM). The SVWM simulates the daily historical water balance and hydrologic conditions for the Salinas Valley study area including the many un-gaged tributary subdrainages in the rugged and mountainous upland areas surrounding flat-lying valley lowlands...
By
California Water Science Center

Select Borehole Data for the East Mesa area and vicinity, Imperial County, CA Select Borehole Data for the East Mesa area and vicinity, Imperial County, CA

This data release provides borehole location and lithology information from selected boreholes in the East Mesa and surrounding areas of Imperial County, California. The area of focus includes parts of the Imperial, Ogilby, and Amos Valley groundwater basins. The purpose of the study is to estimate the future Total Dissolved Solids (TDS) concentration in groundwater pumped by the LCWPS...
By
California Water Science Center

Yucaipa Integrated Hydrologic Model: simulating future climate scenarios in the Yucaipa Valley Watershed, San Bernardino and Riverside Counties, California Yucaipa Integrated Hydrologic Model: simulating future climate scenarios in the Yucaipa Valley Watershed, San Bernardino and Riverside Counties, California

Managing water resources in semiarid watersheds is challenging because of limited water supply and uncertain impacts of future climate conditions on groundwater resources. This paper examines the impact of future climate changes on the urban Yucaipa Valley watershed in southern California using an integrated hydrological model referred to herein as the Yucaipa model. Coupled Groundwater...
By
California Water Science Center

Soil texture and hydraulic conductivity at a 1-kilometer resolution for the Contiguous United States based on 30-meter resolution data from the Polaris database. Soil texture and hydraulic conductivity at a 1-kilometer resolution for the Contiguous United States based on 30-meter resolution data from the Polaris database.

The U.S. Geological Survey (USGS) Integrated Water Availability Assessments (IWAAs) Program is designed to deliver nationally consistent assessments of water supplies for human and ecological needs, and to identify factors that influence water availability. In support of these studies, a National-Extent Hydrogeologic Framework (NEHF) is under development. The NEHF is a three-dimensional...
By
California Water Science Center

Quaternary ammonium compounds in wastewater treatment effluents from 2020 to 2021 Quaternary ammonium compounds in wastewater treatment effluents from 2020 to 2021

Quaternary ammonium compounds (QAC) are used in many commercial and household disinfection products. A method was developed to measure QAC occurrence in water discharged from three wastewater treatment plants during 2020 and 2021. Water samples (20 mL) were processed via solid phase extraction using weak cation exchange (WCX) cartridges (3 cc, 60 mg) and analyzed via liquid...
By
California Water Science Center

Water chemistry data for samples collected at groundwater and surface-water sites in the San Ardo Oil Field study area, March 2019–May 2021, Monterey County, California Water chemistry data for samples collected at groundwater and surface-water sites in the San Ardo Oil Field study area, March 2019–May 2021, Monterey 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...
By
California Water Science Center

Example Groundwater-Level Datasets and Benchmarking Results for the Automated Regional Correlation Analysis for Hydrologic Record Imputation (ARCHI) Software Package Example Groundwater-Level Datasets and Benchmarking Results for the Automated Regional Correlation Analysis for Hydrologic Record Imputation (ARCHI) Software Package

This data release provides two example groundwater-level datasets used to benchmark the Automated Regional Correlation Analysis for Hydrologic Record Imputation (ARCHI) software package (Levy and others, 2024). The first dataset contains groundwater-level records and site metadata for wells located on Long Island, New York (NY) and some surrounding mainland sites in New York and...
By
California Water Science Center
Was this page helpful?