Variables used as input to a logistic regression model to estimate high-arsenic domestic-well population in the United States, 1970 through 2013
Approximately 44.1 million people (about 14 percent of the U.S. population) rely on domestic wells as their source of drinking water.  Unlike community water systems, which are regulated by the Safe Drinking Water Act, there is no comprehensive national program for testing domestic well water to ensure that is it safe …