Skip to main content

Data for depth of groundwater used for drinking-water supplies in the United States


Publication Date
Start Date
End Date


Kauffman, L.J., Degnan, J.R., Belitz, K., Stackelberg, P.E., and Erickson, M.L., 2021, Data for depth of groundwater used for drinking-water supplies in the United States (ver. 1.1, November 2021): U.S. Geological Survey data release,


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 the need to identify [...]


Attached Files

Click on title to download individual files attached to this item.

“Compare domestic-supply well data”
1.01 MB text/plain
“Compare public-supply well data”
1.14 MB text/plain
“Public-supply well data from unpublished sources”
6.25 MB text/plain
“Hydrogeologic settings”
50.74 MB application/zip
“Domestic-supply well data from unpublished sources”
108.4 MB text/plain
“open interval estimate equation parameters by hydrogeologic setting”
48.79 KB text/plain
“open interval estimate equation parameters by lithology”
5.78 KB text/plain
“Data source references - tab delimited text”
23.45 KB text/plain
“Data source references - excel”
34.04 KB application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
“Data density and moving median surfaces for domestic-supply wells”
81.44 MB application/zip
“Differences between domestic- and public-supply well moving median surfaces”
80.58 MB application/zip
“Data density and moving median surfaces for public-supply wells”
92.52 MB application/zip
Version 1.1.txt 699 Bytes text/plain


This data release describes the data sources and processing methods used to gather data and summarize the depth of drinking-water supplies by hydrogeologic region in the United States. Depth of the top and bottom of aquifer zones used for groundwater withdrawal for drinking-water were important predictor variables in statistical models used to predict groundwater quality. Drinking-water-quality statistical-modeling results are presented as maps of predictions of water quality and contaminant conditions generated from continuous maps of variables; therefore, a coast-to-coast set of surfaces representing depths to drinking-water supplies is necessary for ongoing regional- and national-scale modeling efforts.


Spatial Services

ScienceBase WMS


  • National Water-Quality Assessment Project
  • USGS Data Release Products
  • USGS New England Water Science Center



Revision 1.1 by James R Degnan on November 15, 2021. To review the changes that were made, see “Version 1.1.txt” in the attached files section.

Additional Information


Type Scheme Key
DOI doi:10.5066/P94640EM

Item Actions

View Item as ...

Save Item as ...

View Item...