Skip to main content
U.S. flag

An official website of the United States government

Think you know about hurricanes? Take our pop quiz!

The USGS celebrates Hurricane Preparedness Week

Take the quiz

U.S. River Conditions, January to March 2022

New data visualization shows low- and high-flow events across the U.S. during the first months of 2022

Watch the viz

Willamette River Basin selected as 4th Integrated Water Science Basin

Studies in this Pacific Northwest basin will advance the science used to manage water for the diverse needs of major cities, fertile agriculture, and ecologically important species

Learn more

Increasing radium in groundwater potentially related to road salt application

New report connects increasing salinity to increasing radium concentrations in low-pH aquifer

Learn more

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

Learn more

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

Explore the NWD

We're One USGS Water

Together with Science Centers and Regions across the Nation

Our partners

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

Current streamflow conditions map

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

Get data

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.

Read

Popular Water Data and Tools

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

More data and tools

News

link

Drought Conditions Continue in Parts of New England

link

Buoy Platforms Monitoring Water Quality Deployed in Southport and Saugatuck Harbors

link

New England WSC Expands Research on Per- and Polyfluoroalkyl Substances (PFAS)

View All

Publications

A structured decision-making framework for managing cyanobacterial harmful algal blooms in New York State parks

Cyanobacteria are increasingly a global water-quality concern because of the potential for these organisms to develop into potentially harmful blooms that affect ecological, economic, and public health. Cyanobacterial harmful algal blooms (CyanoHABs) can lead to a decrease in water quality and affect many of the recreational and ecological benefits of parks that include lakes. The New York State O
By
Water Resources, New York Water Science Center

Characterization of and temporal changes in groundwater quality of the Upper Black Squirrel Creek Basin, El Paso County, Colorado, 2018–20

In 2018–20, the U.S. Geological Survey, in cooperation with Upper Black Squirrel Creek Ground Water Management District, sampled 48 wells for Phase III of a multiphase plan investigating groundwater quality in the alluvial aquifer of the Upper Black Squirrel Creek Basin (UBSB), El Paso County, Colorado. Results for samples collected from October to December each year were used to assess spatial an
By
Water Resources, Colorado Water Science Center

Hydrogeology and simulation of groundwater flow in the Lucerne Valley groundwater basin, California

The Lucerne Valley is in the southwestern part of the Mojave Desert and is about 75 miles northeast of Los Angeles, California. The Lucerne Valley groundwater basin encompasses about 230 square miles and is separated from the Upper Mojave Valley groundwater basin by splays of the Helendale Fault. Since its settlement, groundwater has been the primary source of water for agricultural, industrial, m
By
Water Resources, Geology, Minerals, Energy, and Geophysics Science Center, California Water Science Center
View All

Science

link
View of Dos Bocas reservoir, Utuado, PR

Puerto Rico Hazards: Water Resources | Los peligros de Puerto Rico: Recursos de agua

The USGS monitors and studies water resources to deliver a wide range of data including streamflow conditions, groundwater information, lake and reservoir elevation, water quality, water use, and water availability, which can be accessed through the USGS National Water Dashboard. As of 2022, the USGS real-time water data network is comprised of 109 streamflow observation stations, 20 groundwater...
By
Natural Hazards, Water Resources
link

Puerto Rico Hazards: Water Resources | Los peligros de Puerto Rico: Recursos de agua

The USGS monitors and studies water resources to deliver a wide range of data including streamflow conditions, groundwater information, lake and reservoir elevation, water quality, water use, and water availability, which can be accessed through the USGS National Water Dashboard. As of 2022, the USGS real-time water data network is comprised of 109 streamflow observation stations, 20 groundwater...
Learn More
link
Lake Koocanusa

Describing the Water Quality of Lake Koocanusa (Koocanusa Reservoir)

Lead Researchers: Travis Schmidt and Chris Mebane Project Manager: Melissa Schaar
By
Water Resources, Wyoming-Montana Water Science Center
link

Describing the Water Quality of Lake Koocanusa (Koocanusa Reservoir)

Lead Researchers: Travis Schmidt and Chris Mebane Project Manager: Melissa Schaar
Learn More
link
Image Collage of Landsat, pollinator, and volcanologist

Next Generation Stream Gaging

USGS scientists and partners have developed and deployed a low-cost, low-power stream gage system that could meet California’s next generation water needs. The system is now in experimental deployment in Sonoma County, addressing post-wildfire runoff threats and is being developed for the Upper Feather River watershed in northern California - a primary source of the state's water supply. This...
By
Water Resources, California Water Science Center, National Innovation Center
link

Next Generation Stream Gaging

USGS scientists and partners have developed and deployed a low-cost, low-power stream gage system that could meet California’s next generation water needs. The system is now in experimental deployment in Sonoma County, addressing post-wildfire runoff threats and is being developed for the Upper Feather River watershed in northern California - a primary source of the state's water supply. This...
Learn More
View All