Datasets

Description:

The National Water-Well Database (NWWDB) is a compilation of water-well records from state-managed databases that have been standardized to a common format for consistency across state and administrative boundaries. Water-well completion reports that are submitted to permitting state agencies by licensed drillers constitute a large source of hydrogeologic information, including the locations and distribution of water wells, construction materials and completion depths, lithologic logs, groundwater levels, and the results of pumping or aquifer tests. Standardization was performed based on a U.S. Geological Survey (USGS) profile of the Open Geospatial Consortium (OGC) GroundWaterML2 (GWML2) standard ( https://docs.ogc.org/is/19-013/19-013.html ) . Two datasets are available for each state: 1) original water-well records, provided as received from host repositories at the state level except for standardization by the USGS per OGC GWML2, and 2) water-well records which have received additional processing by the USGS involving the application of quality-assurance rules, harmonization of lithologic descriptions around a common codeset, and estimates of transmissivity for the water-bearing intervals of water wells based on specific-capacity data. Statewide downloads are provided in the OGC GeoPackage (.gpkg) file format.
This dataset is being released on a state-by-state basis. Only a subset of the states may currently be available for download, but the dataset will continue to be updated with new states over time.