Please keep in mind that the US water supply naturally has higher concentrations of pollutants than many other countries. We also have a higher population drink

Please keep in mind that the US water supply naturally has higher concentrations of pollutants than many other countries. We also have a higher population drinking straight from the water table pump. It makes it hard to do a direct comparison since other countries don't have to do as much. https://water.usgs.gov/nawqa/trace/pubs/gw_v38n4/ https://water.usgs.gov/nawqa/trace/pubs/gw_v38n4/