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Filters Date Types (for Date Range) Types OGC WMS Layer (2) OGC WMS Service (2) Citation (1) Contacts James R Degnan Naomi Nakagaki Water Resources Melinda L Erickson California Water Science Center More... Categories Data (1) Data Release - Revised (1) Tag Types Theme (2) USGS Scientific Topic Keyword (2) Harvest Set (2) Place (2) Tag Schemes None (2) USGS Thesaurus (1) ISO 19115 Topic Category (1) Common geographic areas (1) Marine Realms Information Bank (MRIB) keywords (1) View Results as: JSON ATOM CSV

Data for depth of groundwater used for drinking-water supplies in the United States This data release includes grids representing the depth and thickness of drinking-water withdrawal zones, polygons of hydrogeologic settings, an inventory of sources of well construction data, and summaries of data comparisons used to assess the depth of groundwater used for drinking-water supplies in the United States. Well construction data sources are documented in Table1_DataSources.xlsx. Data comparisons using the Mann-Whitney test to assess similarity between hydrogeologic settings were used to justify combining data where they were sparse (compare_neighbors_all_domestic.txt and compare_neighbors_all_public.txt). Water-supply-well depth varies geographically by water use and the type of well, which illustrates... Categories: Data, Data Release - Revised; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Cycle 3, Hydrology, NAWQA, USGS Science Data Catalog (SDC), United States, All tags... Water Quality, Water Resources, aquifers, domestic well water use, drinking water use, groundwater, public supply water use, water quality, Fewer tags Estimates of subsurface tile drainage extent for the conterminous United States, early 1990s This dataset is a 30-meter resolution national-scale raster of estimated subsurface tile drainage extent based on early 1990s county areas of subsurface tile drains and geospatial datasets of cropland and poorly drained soil. Specifically, it was developed using 1) county-level acres of subsurface tile drain extents from Sugg (2007); 2) the extent of cultivated cropland from the National Land Cover Database (NLCD) 2011; 3) the extent of poorly drained soil from the State Soil Geographic (STATSGO) database Version 2; 4) the extent of federally-owned land, and 5) county administrative boundaries. Sugg's (2007) area of subsurface tile drains within each county was evenly allocated to potentially drained land -- cropland... Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: MSQA, Midwest Stream Quality Assessment, NAWQA, National Water Quality Assessment, USGS Science Data Catalog (SDC), All tags... Water Quality, conterminous United States, environment, geoscientificInformation, inlandWaters, subsurface drainage extent, subsurface tile drainage, tile drain, water quality, Fewer tags