Cadmium factsheet – Water Quality Association
https://www.wqa.org/Portals/0/Technical/Technical%20Fact%20Sheets/2015_Cadmium.pdf
https://www.wqa.org/Portals/0/Technical/Technical%20Fact%20Sheets/2015_Cadmium.pdf
https://www.wellwater.bse.vt.edu/files/HeavyMetals442-657_pdf.PDF
https://www.health.state.mn.us/communities/environment/risk/docs/guidance/gw/cadmiuminfo.pdf
https://www.dhss.delaware.gov/dhss/dph/files/cadmiumfaq.pdf