Approximately 71 to 95 million people in the Lower 48 states—more than 20% of the country's population—may rely on groundwater that contains detectable concentrations of per- and polyfluoroalkyl substances, also known as PFAS, for their drinking water supplies. These findings are according to a U.S Geological Survey study published in the journal Science.
There is a large chunk of dark red nearish to me on this map that could be described as one of the least inhabited parts of the state (state forest + wildlife refuge).
Though the groundwater level is probably rather high there so that might mean less chance for it to be filtered out through the soil.
And if you overlay this with a population density map, would they be the exact same? The hot spots are just the major US cities.
There is a large chunk of dark red nearish to me on this map that could be described as one of the least inhabited parts of the state (state forest + wildlife refuge).
Though the groundwater level is probably rather high there so that might mean less chance for it to be filtered out through the soil.