Domestic well locations and populations served in the contiguous U.S.: 1990, Block-group method (BGM) map.
In this dataset we present two maps that estimate the location and population served by domestic wells in the contiguous United States. The first methodology, called the “Block Group Method” or BGM, builds upon the original block-group data from the 1990 census (the last time the U.S. Census queried the population …