USGS Groundwater Information
New & Noteworthy
USGS Groundwater Watch
USGS maintains a network of active wells to provide basic statistics about groundwater levels.
USGS in Your State
USGS Water Science Centers are located in each state.
Other USGS Water Science Areas
USGS Groundwater Data
The U.S. Geological Survey provides unbiased, timely, and relevant data on the groundwater resources of the Nation:
The USGS Groundwater Watch web sites group related wells and data from National Water Information System (NWIS) active well networks and provide basic statistics about the groundwater-level data. Networks include the Active Groundwater Level Network, the Climate Response Network, the Real-Time Groundwater Level Network, regional and state networks, and more.
NWISWeb is the online interface to the USGS National Water Information System (NWIS) database. NWIS includes more than 850,000 records of wells, springs, test holes, tunnels, drains, and excavations in the United States. Data from groundwater-level measurements can be accessed through web forms, maps, and web services.
Water Data Mobile Notifications
The National Ground-Water Monitoring Network (NGWMN) compiles selected groundwater monitoring wells from Federal, State, and local groundwater monitoring networks across the nation, including the USGS NWISWeb. The NGWMN is a product of the Subcommittee on Groundwater of the Federal Advisory Committee on Water Information.
The Ground Water Atlas of the United States describes the location, hydrologic characteristics, and geologic characteristics of the principal aquifers throughout the 50 States, Puerto Rico, and the U.S. Virgin Islands. Published in 2000, the Atlas provides key descriptive information in a regional and national context.
A two-dimensional map of the principal aquifers of the Nation was published in 2003. The map, derived from the Ground Water Atlas, indicates the areal extent of the uppermost principal aquifers on a national scale.
Regional Groundwater Studies
The USGS studies groundwater at the regional scale to improve our understanding of groundwater availability and quality in major aquifers across the Nation.
The National Cooperative Geologic Mapping Program (NCGMP) provides accurate geologic maps and three-dimensional framework models that help to sustain and improve the quality of life and economic vitality of the Nation and to mitigate natural hazards.
The National Aquifer Code Reference List provides the USGS National Water Information System (NWIS) codes used for the principal U.S. aquifers and information about the aquifers.
The USGS compiles water-use information aggregated at the county, state, and national levels. Every five years, data at the county level are compiled into a national water-use data system and state-level data are published in a national circular.
The USGS collects, analyzes, archives, and disseminates data and information describing the quality of the Nation's groundwater resources. Visit the USGS Water-Quality Data web site to find about more about what USGS water-quality groundwater data are available.
Contact Your Local USGS Office
For other local USGS water information or data, contact the USGS Water Science Center in your area by selecting the state or region:
The Science in Your Watershed web site enables you to locate scientific information organized on a watershed basis.