Radium factsheet Water Quality Association
https://www.wqa.org/Portals/0/Technical/Technical%20Fact%20Sheets/2014_Radium.pdf
Document Tag: Radium
Radium webpage Minnesota Department of Health
https://www.health.state.mn.us/communities/environment/water/contaminants/radionuclides.html
Radium webpage Environmental Protection Agency
https://www.epa.gov/radtown/natural-radionuclides-private-wells
Radium webpage Maryland Department of the Environment
https://mde.state.md.us/programs/Water/water_supply/Pages/radium.aspx
Radium webpage Anne Arundel County Department of Health
https://aahealth.org/radium-in-well-water/