California Water Science Center

Data and Tools

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.

Current California Streamflow Conditions

Current California Streamflow Conditions

Real-time streamflow data from automated equipment, representing the most current hydrologic conditions.

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California Groundwater Quality

California Groundwater Quality

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
Filter Total Items: 146
Date published: May 16, 2019

USGS Installed Wells - San Diego County, CA

Summary tables of data for USGS installed wells in San Diego County, CA.  Included are links to data sets, including well construction, geophysical logs, lithologic logs, groundwater levels, water quality, and streamgages.

Date published: April 26, 2019

Furnished Data Guidelines

The annual review by USGS personnel of furnished records is designed to ensure that furnished records are collected in accordance with USGS standards. Furnished records are provided to the USGS by Federal Energy Regulatory Commission (FERC) licensees and other cooperating agencies as a method for reviewing and quality assuring their records so that the data are collected using methods that...

Date published: February 21, 2019

Yucaipa Valley Hydrologic Monitoring

This site provides hydrologic data collected or compiled by the USGS in the Yucaipa area; some additional data may be available from the USGS database National Water Information System (NWIS).

Date published: February 13, 2019

San Antonio Creek Monitoring Networks

In order to understand the integrated hydrologic systems, many different types of data are being gathered from both the surface water and groundwater system. Learn about these data types and explore them with the interactive map.

Date published: February 11, 2019

Electromagnetic induction (EMI) geophysical data collected at the Bicycle Basin, U.S. Army Fort Irwin National Training Center, California

This data release presents raw (.csv) and processed (.csv) data files from land-based, frequency-domain electromagnetic induction (EMI) data collected at Bicycle Basin, U.S. Army Fort Irwin National Training Center, California. Data were collected during three distinct time periods: March 19, 2008 (1 survey), December 1 to December 5, 2014 (46 surveys) and December 4 to December 8, 2015 (62...

Date published: February 1, 2019

Groundwater Levels and Water Quality | Borrego Valley

Table of groundwater well sites in the Borrego Valley that were sampled for groundwater quality and groundwater level measurements.  Provides links to data as well as archvied well documents.

Date published: January 31, 2019

Assessment of Groundwater Quality in the Borrego Valley

The quality of groundwater in the Borrego Valley is a concern because it is the sole source of water for agricultural, recreational, and public supply. Explore the interactive water-quality data map for detailed information and to download data.

Date published: January 1, 2019

Absorption, distribution, metabolism, and elimination of seed-treatment pesticides following the dosing of Japanese quail (Coturnix japonica)

Japanese quail (Coturnix japonica) were orally dosed with pesticide-treated or control-untreated wheat seeds. Pesticide treated wheat seeds were analytically verified for active ingredients of imidacloprid, metalaxyl, tebuconazole, and fludioxonil. Pesticide and metabolite residues were measured in plasma, liver, brain, kidney, muscle, and excreta of exposed and control birds. Samples were...

Date published: January 1, 2019

Turbidity and water temperature profile data in Don Pedro Reservoir, California, 2015-2016

This dataset includes water temperature and turbidity profiles collected in Don Pedro Reservoir, California, during 2015-2016.

Date published: January 1, 2019

Geochemical and geophysical data for selected wells in and surrounding the South Cuyama oil and gas field

The U.S. Geological Survey (USGS) in cooperation with the California State Water Resources Control Board and Bureau of Land Management compiled and analyzed data for mapping groundwater salinity in selected oil and gas fields in California. The data for the South Cuyama oil field includes well construction data, digitized borehole geophysical data, geochemical analyses of water samples from...

Date published: January 1, 2019

Historical Produced Water Chemistry Data Compiled for the Lost Hills and North and South Belridge Oilfields, Kern County, California

This dataset contains geochemical and other information for 268 samples of produced water from the Lost Hills and North and South Belridge Oil Fields. Produced water is water coexisting with oil and gas. The historical produced water chemistry data was compiled from preexisting datasets and scanned images into a numerical dataset to characterize produced water chemical characteristics. Each...

Date published: January 1, 2019

Table 1. Station descriptions for 312 continuous-record streamflow gages, used to estimate runoff and baseflow using six hydrograph-separation methods, in the Northwest Volcanic Aquifer Study Area, USA.

The U.S. Geological Survey’s Water Availability and Use Study Program (WAUSP) ( supports quantitative assessments of groundwater availability in areas of critical importance. As part of a WAUSP study in the arid to semi-arid Northwest Volcanic Aquifer Study...