USGS
The USGS Office of Ground Water provides access to data and information on groundwater resources in the U.S. USGS Groundwater Watch The Groundwater Watch web sites group related wells and data from National Water Information System (NWIS) active well networks and provide basic statistics about the water-level data. The USGS Groundwater Watch web site provides KMZ files presenting the mapped visualization of basic groundwater-level data statistics. Networks include the Active Groundwater Level Network, the Climate Response Network, the Real-Time Groundwater Level Network, regional and state networks, and more. WaterAlert The USGS WaterAlert service sends e-mail or text messages when certain parameters measured by a USGS data-collection station exceed thresholds set by the user. Alerts are available for selected USGS groundwater, surface-water, water-quality, and precipitation data-collection stations that are part of the National Water Information System (NWIS). USGS Online Groundwater Data (NWIS) The National Water Information System (NWIS) groundwater database consists of more than 850,000 records of wells, springs, test holes, tunnels, drains, and excavations in the United States. USGS Annual Water Data Reports Water resources data are published annually. These archival products supplement direct access to current and historical water data provided by NWISWeb. [Summary provided by the USGS.]
DOI/USGS/WRD/OGW