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,...全美约有4410万人口，占美国总人口的14%左右，以家用自备水井（domestic wells）作为饮用水源。与公共供水系统（community water systems）不同的是，……