Mission Areas

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 availability.

USGS Water Data for the Nation

USGS Water Data for the Nation

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

Message from the Associate Director for Water

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.

USGS Water Data for the Nation

Water Quality Portal

National Groundwater Monitoring Network Data Portal

WaterWatch

Groundwater Watch

MODFLOW

StreamStats

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News

Date published: January 22, 2020

Nitrate loads entering the Gulf of Mexico have not changed despite reductions at local scales

Reducing delivery of nitrate to the Gulf of Mexico is critical to decreasing the size of the “dead zone”—an area of hypoxia, or low dissolved oxygen—in Louisiana coastal waters. A new USGS study reports that larger, more widespread decreases in nitrate loading to the Gulf are needed to achieve the target levels of a 25% reduction by...

Date published: January 9, 2020

New USGS online tools for watershed managers

SPARROW models, tools, and maps of streamflow, nutrients, and sediment for streams in five major U.S. regions

Date published: January 9, 2020

Herbicide glyphosate prevalent in U.S. streams and rivers

The herbicide glyphosate was detected at least once in 66 of 70 U.S. streams and rivers located in a range of land-use settings, according to a recent study by the U.S. Geological Survey National Water Quality Program. Glyphosate is the active ingredient in the popular weed killer Roundup® and is the most widely used herbicide in...

Publications

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Year Published: 2020

Precipitation, temperature, groundwater-level elevation, streamflow, and potential flood storage trends within the Brazos, Colorado, Big Cypress, Guadalupe, Neches, Sulphur, and Trinity River Basins in Texas Through 2017

The U.S. Geological Survey (USGS), in cooperation with the U.S. Army Corps of Engineers (USACE), analyzed streamflow trends and streamflow-related variables through 2017 in seven important water-supply basins to provide information that can help water managers with the USACE and river authorities make future water management decisions. The primary...

Harwell, Glenn R.; McDowell, Jeremy; Gunn-Rosas, Cathina; Garrett, Brett
Harwell, G.R., McDowell, J.S., Gunn, C.L., and Garrett, B.S., 2020, Precipitation, temperature, groundwater-level elevation, streamflow, and potential flood storage trends within the Brazos, Colorado, Big Cypress, Guadalupe, Neches, Sulphur, and Trinity River Basins in Texas through 2017: U.S. Geological Survey Scientific Investigations Report 2019–5137, 94 p., https://doi.org/10.3133/sir20195137.

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Year Published: 2020

Seepage investigation of the Rio Grande from below Leasburg Dam, Leasburg, New Mexico, to above El Paso, Texas, 2018

Seepage investigations were conducted periodically by the U.S. Geological Survey (USGS) from 1988 to 1998 and from 2006 to 2015 along a 64-mile reach of the Rio Grande as part of the Mesilla Basin monitoring program. Past studies were conducted during no-flow or low-flow periods. In 2018, a seepage investigation was conducted during April 3–4...

Ball, Grady P.; Robertson, Andrew J.; Morales, Karen Medina
Ball, G.P., Robertson, A.J., and Medina Morales, K., 2020, Seepage investigation of the Rio Grande from below Leasburg Dam, Leasburg, New Mexico, to above El Paso, Texas, 2018: U.S. Geological Survey Scientific Investigations Report 2019–5140, 16 p., https://doi.org/10.3133/sir20195140.

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Year Published: 2020

Storage capacity and sedimentation characteristics of the San Antonio Reservoir, California, 2018

The San Antonio Reservoir is a large water storage facility in Alameda County, California, and is a major component of the Hetch Hetchy Regional Water System (RWS). The RWS is a water-supply system owned and operated by the San Francisco Public Utilities Commission (SFPUC) and provides water for about 2.7 million people in the San Francisco, Santa...

Marineau, Mathieu D.; Wright, Scott A.; Lopez, Joan V.
Marineau, M.D., Wright, S.A, and Lopez, J.V., 2020, Storage capacity and sedimentation characteristics of the San Antonio Reservoir, California, 2018: U.S. Geological Survey Scientific Investigations Report 2019–5151, 34 p., https://doi.org/10.3133/sir20195151.