The U.S. counties with the most egregious water quality violations are concentrated in four states: West Virginia, ...

Four counties in Pennsylvania ranked in the top 10 worst - Potter ... The researchers also calculated a 'water injustice' score for each US county, which was based on interviews with people ...

The U.S. counties with the most egregious water quality violations are concentrated in four states: West Virginia, Pennsylvania, North Carolina and Oklahoma, a new study has found. Standing out ...