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U.S. Groundwater Conditions

New data visualization shows groundwater levels at 2,281 well sites across the U.S.

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Rivers in the sky: 6 facts you should know about atmospheric rivers

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USGS-National Park Service Partnership launches new website

New features like an interactive map and improved search provide easier access to project information and products

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Groundwater flow to Colorado River may decline by 29% over the next 30 years

Upper Colorado River Basin baseflow accounts for more than 50% of annual streamflow; new model reflects possible climate change conditions

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Recent study uses the National Water Quality Laboratory's new PFAS-detection method

34 per- and polyfluoroalkyl substances (PFAS) were detected in 60 Iowa streams, providing critical baseline data

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Looking for current water conditions?

The National Water Dashboard is an interactive, mobile-friendly tool that provides real-time water, weather, and flood information all in one place

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We're One USGS Water

Together with Science Centers and Regions across the Nation

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Water Resources

Water information is fundamental to national and local economic well-being, protection of life and property, and effective management of the Nation’s water resources. The USGS works with partners to monitor, assess, conduct targeted research, and deliver information on a wide range of water resources and conditions including streamflow, groundwater, water quality, and water use and availabil

USGS Water Data for the Nation

Current streamflow conditions map

Surface-water, groundwater, water-quality, and water-use data collected at approximately 1.9 million sites across all 50 states.

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Message from the Associate Director for Water

Photo of Don Cline

Learn more about the WMA from Dr. Don Cline, the Associate Director for Water Resources.

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Popular Water Data and Tools

Explore our science by the topical areas that drive the research and projects conducted by our Programs.

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News

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USGS Partners with UA to Build Hydrologic Instrumentation Facility

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Bartholomay Named Director of USGS Idaho Water Science Center

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Rivers in the Sky: 6 Facts You Should Know about Atmospheric Rivers

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Publications

Geology and hydrogeology of the Yucaipa groundwater subbasin, San Bernardino and Riverside Counties, California

The Yucaipa groundwater subbasin (referred to in this report as the Yucaipa subbasin) is located about 75 miles (mi) east of of Los Angeles and about 12 mi southeast of the City of San Bernardino. In the Yucaipa subbasin, as in much of southern California, limited annual rainfall and large water demands can strain existing water supplies; therefore, understanding local surface water and groundwate
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Water Resources, Geology, Minerals, Energy, and Geophysics Science Center, California Water Science Center

Characterization of ambient groundwater quality within a statewide, fixed-station monitoring network in Pennsylvania, 2015–19

Pennsylvania leads the Nation in the number of individuals that use groundwater for private domestic water supply; more than 3 million rural and suburban Pennsylvania residents rely on private domestic supplies for drinking water. These supplies are not regulated nor routinely monitored; thus relevant groundwater-quality information is not widely available. The U.S. Geological Survey (USGS), in co
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Water Resources, Pennsylvania Water Science Center

Risk-based prioritization of organic chemicals and locations of ecological concern in sediment from Great Lakes tributaries

With improved analytical techniques, environmental monitoring studies are increasingly able to report the occurrence of tens or hundreds of chemicals per site, making it difficult to identify the most relevant chemicals from a biological standpoint. For this study, organic chemical occurrence was examined, individually and as mixtures, in the context of potential biological effects. Sediment was c
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Ecosystems, Water Resources, Idaho Water Science Center, Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center
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Science

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Image of well that is part of water quality monitoring network, Chester County, Pennsylvania

Pennsylvania Groundwater Quality Monitoring Network

USGS Pennsylvania Water Science Center, in cooperation with the Pennsylvania Department of Environmental Protection, samples 28 wells biannually to monitor ambient groundwater quality conditions throughout Pennsylvania.
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Water Resources, Pennsylvania Water Science Center
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Pennsylvania Groundwater Quality Monitoring Network

USGS Pennsylvania Water Science Center, in cooperation with the Pennsylvania Department of Environmental Protection, samples 28 wells biannually to monitor ambient groundwater quality conditions throughout Pennsylvania.
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Water tower, DeKalb County, Georgia

WUDR Cooperative Funding Awards, FY21

The USGS Water-Use Data and Research (WUDR) program is pleased to announce the recipients of FY21 cooperative agreements. Awards were made to agencies in 6 States, for a total of about $560,000 in funding.
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Water Resources, Water Availability and Use Science Program
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WUDR Cooperative Funding Awards, FY21

The USGS Water-Use Data and Research (WUDR) program is pleased to announce the recipients of FY21 cooperative agreements. Awards were made to agencies in 6 States, for a total of about $560,000 in funding.
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CASCaDE2 flowchart showing the system of linked models being used to evaluate scenarios of climate and infrastructure change.

CASCaDE: Computational Assessments of Scenarios of Change for the Delta Ecosystem

The Delta of the Sacramento and San Joaquin rivers provides drinking water supplies to two-thirds of Californians, and is a fragile ecosystem home to threatened and endangered species. The CASCaDE project builds on several decades of USGS science to address the goals of achieving water supply reliability and restoring the ecosystems in the Bay-Delta system.
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Water Resources
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CASCaDE: Computational Assessments of Scenarios of Change for the Delta Ecosystem

The Delta of the Sacramento and San Joaquin rivers provides drinking water supplies to two-thirds of Californians, and is a fragile ecosystem home to threatened and endangered species. The CASCaDE project builds on several decades of USGS science to address the goals of achieving water supply reliability and restoring the ecosystems in the Bay-Delta system.
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