Water Resources

Society depends on fresh and reliable water supplies, as do diverse and fragile ecosystems. To understand the Nation's water resources, the U.S. Geological Survey (USGS) collects hydrologic and water-quality information and provides access to water data, publications, and maps, as well as to recent water projects and events.

USGS Water Resources home page

Water-Resources Topics

Water Data for the Nation

View current and historical streamflow, groundwater level, and water-quality data.

National Water Information System (NWIS)
National Water Information System - Mapper
Water Data Discovery

Streams, Lakes, and Reservoirs

Science to observe, analyze, and understand the movement and condition of surface water.

WaterWatch - Streamflow conditions
National Streamflow Information Program (NSIP)
Flood Inundation Mapping Science
Publications

Groundwater, Aquifers, and Wells

Science to discover and describe the location, condition, and behavior of water in the ground.

Quality of Water Resources

Science to monitor and evaluate biological, chemical, and environmental factors affecting water quality.

Floods, Droughts, and Current Conditions

View current water conditions and where floods and droughts are occuring.

Current conditions
FloodWatch | DroughtWatch
Interactive flood map
WaterAlert - Subscribe to hydrologic alerts

Water Use

Information about how water is used now and in the past.

International Water Activities

Ongoing water projects of international interest.

Methods and Modeling

Available tools and expertise to conduct water resources science.

Applications software

Accessibility FOIA Privacy Policies and Notices

U.S. Department of the Interior | U.S. Geological Survey
URL: http://www.usgs.gov/water/default.asp
Page Contact Information: Ask USGS
Page Last Modified: Tuesday, December 04, 2012