A. The states with the highest concentration of lead in the drinking water measured in parts per billion (ppb) in order of the highest risk of lead poisoning are:

  1. Texas,
  2. Pennsylvania,
  3. New York,
  4. California
  5. New Jersey,
  6. Maine,
  7. Vermont,
  8. Connecticut,
  9. Massachusetts,
  10. Wisconsin,
  11. Florida,
  12. Georgia, and
  13. North Carolina

Source: EPA Safe Drinking Water Information System (SDWIS) database.