Estimating Domestic Self-Supply Water Use for the Delaware River Basin, 1990 U.S. Census Block Groups
According to the U.S. Geological Survey, an estimated 258 million people nationwide, 
or 86% of the U.S. population, relied on public water supplies for their household use in 
2005 (USGS, 2013). The remaining population obtains their water from different sources, 
such as a domestic self-supply well. However, the …