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: 166
Date published: October 4, 2019

Dissolved Noble Gas Concentrations and Modeled Recharge Temperatures for Groundwater from Northern Sierra Nevada Foothills Shallow Aquifer Assessment Study Units, 2015-2017: Results from the California GAMA Priority Basin Project

This data release documents 155 sets of dissolved noble gas analyses (neon, argon, krypton, xenon) and 153 modeled recharge temperatures for groundwater sampled from domestic water supply wells and springs throughout the northern Sierra Nevada foothills as part of the California State Water Resources Control Board’s Groundwater Ambient Monitoring and Assessment (GAMA) Program in 2015...

Date published: August 21, 2019

Borehole Erosion Test data, Lower American and Sacramento Rivers, California, 2019

Borehole erosion tests were performed to quantify sediment erosion rates as a function of depth below grade and flow speed at locations along the Sacramento and American Rivers in 2019. The dataset consists of: - borehole caliper files describing the initial geometry of the borehole, and its shape after each test flow event, - where available, a digital time series describing discharge into...

Date published: July 31, 2019

Terrestrial Laser Scanning Data from the Confluence of the South Yuba River and Humbug Creek, Nevada County, California, 2011-2013

High-resolution, terrestrial laser scanning, also known as ground-based lidar (light detection and ranging), was used to quantify the volume of mercury-contaminated sediment eroded from an outcrop of historical placer-mining debris at the confluence of the South Yuba River and Humbug Creek in the Sierra Nevada mountains, about 17 kilometers northeast of Grass Valley, California. The outcrop...

Date published: July 12, 2019

EEMs from Different Source Material

Four excitation-emission matrices showing fluorescence from different sources of dissolved organic matter common to the Sacramento-San Joaquin Delta (California, USA).

Date published: June 11, 2019

Attributed California Water Supply Well Completion Report Data for Selected Areas, Derived from CA WCR OSCWR Data

This Well Completion Report geospatial dataset represents an index to a subset of records available from the California Department of Water Resources' (DWR) Online System for Well Completion Reports (OSWCR). This release contains water supply well records from Amador, Calaveras, El Dorado, Nevada, Placer, Sacramento, San Bernardino, Sutter, and Yuba counties. The USGS California Water...

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.