Resources Resources For more information on radium: Radionuclide Basics: Radium | US EPA Radium | Public Health Statement | ASTDR For more information on radium in groundwater: FACTSHEET: EPA FACTS ABOUT RADIUM – FINAL Natural Radionuclides in Private Wells | US EPA For more information on radon in Pennsylvania: Radon in the Home For more information about salinity in your area: Salt Watch Findings (2021-2022) (iwla.org)