Water Resources

Data and Tools

The USGS Water Resources Mission Area provides water information that is fundamental to national and local economic well-being, protection of life and property, and effective management of the Nation’s water resources. Below, find data and tools relevant to 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

Access to water data collected at approximately 1.9 million sites

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Water Quality Portal

Water Quality Portal

Water quality data from state, federal, tribal, and local agencies

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Filter Total Items: 400
Date published: March 4, 2019

BioData - Aquatic Bioassessment Data

The USGS BioData Retrieval system provides access to aquatic bioassessment data (biological community and physical habitat data) collected by USGS scientists from stream ecosystems across the nation. USGS scientists collect fish-, aquatic macroinvertebrate-, and algae-community samples and conduct stream physical habitat surveys. Click to learn more about USGS BioData.

Date published: March 4, 2019

USGS Flood Inundation Mapper

USGS Flood Inundation Maps, along with Internet information regarding current stage from the USGS streamgage, provide emergency management personnel and residents with information that is critical for flood-response activities, such as evacuations and road closures, as well as for post-flood recovery efforts.

Date published: March 4, 2019

Federal Priority Streamgages (FPS)

This mapper identifies USGS Federal Priority Streamgages (FPS). FPS are monitoring stations that track the amount of water in streams and rivers across the Nation to meet long-term federal information needs. They are strategically positioned to serve as a backbone for the larger National Streamflow Network that is operated in cooperation with over 1,200 federal, state, tribal, and local...

Date published: March 4, 2019

Endangered, Discontinued, and Rescued Stations

This mapper identifies USGS streamgages that are in danger of being discontinued or converted to a reduced level of service due to lack of funding, gages that already have been discontinued, and gages that have been ‘rescued’ by a new funding source.

Date published: March 4, 2019

Science in Your Watershed

The Science in Your Watershed website helps you find scientific information organized on a watershed basis. This information, coupled with observations and measurements made by the watershed groups, provides a powerful foundation for characterizing, assessing, analyzing, and maintaining the status and health of a watershed.

Attribution: Water Resources
Date published: March 4, 2019

National Environmental Methods Index (NEMI)

NEMI is a searchable database of environmental methods, protocols, statistical and analytical methods, and procedures that allows scientists and managers to find and compare methods for all stages of the monitoring process.

Date published: March 4, 2019

Principal Aquifers of the United States

A principal aquifer is defined as a regionally extensive aquifer or aquifer system that has the potential to be used as a source of potable water. This site provides downloadable maps (Ground Water Atlas of the United States, 2003) and spatial data (National Atlas, 2014) for the principal aquifers and aquifers of alluvial and glacial origin of the U.S.

Date published: March 4, 2019

Estimated Annual Agricultural Pesticide Use

View the geographic distribution of estimated use of numerous pesticides on agricultural land in the conterminous United States. A graph accompanies each map, which shows annual national use by major crop for the mapped pesticide for each year during the period.

Date published: March 4, 2019

Water-Quality Changes in the Nation's Streams and Rivers

This mapper provides results from the largest-ever assessment of water quality changes in the Nation's streams and rivers. More than 185 million water-quality records from over 600 Federal, State, Tribal, and local organizations were screened as part of this assessment. 

Date published: March 4, 2019

Groundwater Quality: Decadal Change

Almost one-half of the U.S. population rely on groundwater for their water supply, and demand for groundwater for public supply, irrigation, and agriculture continues to increase. This mapper shows how concentrations of pesticides, nutrients, metals, and organic contaminants in groundwater are changing during decadal periods across the Nation.

Date published: March 4, 2019

Watershed Regressions for Pesticides (WARP)

The Watershed Regression for Pesticides (WARP) is an online tool that allows users to estimate pesticide concentrations for streams that have not been monitored. WARP models are developed using linear regression methods to establish quantitative linkages between measured pesticide concentrations and a variety of human-related and natural factors that affect pesticides in streams.

Attribution: Water Resources
Date published: March 4, 2019

Environmental Data Discovery and Transformation (EnDDaT)

Environmental Data Discovery and Transformation (EnDDaT) accesses environmental data from a variety of data sources, compiles and processes the data, and performs common transformations. The result is that data from multiple sources is sorted into a single table that aids model development.