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: 156
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 26, 2019

Electrical conductivity, pH, and dissolved oxygen time-series data generated from the short-term precision experiment and the long-term field precision analysis to characterize water-quality sondes for the Guidelines and Standard Procedures for High-Frequ

The authors examined the long-term precision of SC, pH, and DO sensors by analyzing the groundwater-quality time-series data generated at a deep municipal supply well (USGS station 364200119420001) during the period from September 2013 to July 2018. The data set presented is the data collected by the RBRmaestro sonde the during the time period from February 2016 to June 2016 and September 2017...

Date published: July 26, 2019

Electrical conductivity and pH time-series data generated from the short-term precision experiment to characterize water-quality sondes for the Guidelines and Standard Procedures for High-Frequency Groundwater-Quality Monitoring Station Techniques and Me

This dataset was generated during the precision testing of three water-quality sondes before picking one to use for field deployment of high frequency ground-water quality monitoring. Precision is important because the authors wanted to try and minimize calibration drift corrections between site visits. A laboratory experiment was conducted for the three sondes to simultaneously measure at...

Date published: July 12, 2019

OFR Aqualog Cover Art

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 21, 2019

Table of Analysis Methods

Table of Analysis Methods

Date published: June 20, 2019

Laboratory DQOs

Laboratory DQOs

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...