Skip to main content

Probability of arsenic concentrations greater than 10 micrograms per liter in groundwater used by domestic wells in the United States


Publication Date
Time Period


Ayotte, J.D., Medalie, Laura, and Qi, S.L., 2017, Estimated county level domestic well population with arsenic greater than 10 micrograms per liter based on probability estimates for the conterminous U.S.: U.S. Geological Survey data release,


Arsenic concentrations from 20,450 domestic wells in the U.S. were used to develop a logistic regression model of the probability of having arsenic > 10 µg/L (“high arsenic”), which is presented at the county, state, and national scales. Variables representing geologic sources, geochemical, hydrologic, and physical features were among the significant predictors of high arsenic. For U.S. Census blocks, the mean probability of arsenic > 10 µg/L was multiplied by the population using domestic wells to estimate the potential high-arsenic domestic-well population. Approximately 44.1 M people in the U.S. use water from domestic wells. The population in the conterminous U.S. using water from domestic wells with predicted arsenic concentration [...]


Point of Contact :
Joseph D Ayotte
Originator :
Sharon L Qi
Metadata Contact :
Sharon L Qi
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase

Attached Files

Click on title to download individual files attached to this item. 197.28 MB


This data set represents the probability value of finding arsenic concentrations greater than 10 micrograms per liter in domestic wells and should not be used at resolutions less than that of the dataset.


Spatial Services

ScienceBase WMS


  • John Wesley Powell Center for Analysis and Synthesis
  • USGS Data Release Products



Data source
Input directly

Item Actions

View Item as ...

Save Item as ...

View Item...