1. ATSDR (Agency for Toxic Substances and Disease Registry) 2005 Perchlorates Div. of Toxicology & Envir. Med. ToxFAQs ™ http://www.atsdr.cdc.gov/tfacts162.pdf
2. CDPH (California Department of Public Health) 2007 Perchlorate in Drinking Water http://www.cdph.ca.gov/certlic/drinkingwater/Pages/Perchlorate.aspx
3. MDEP (Massachusetts Department of Environmental Protection) 2006 7/28/06 Revisions to 310 CMR 22.00. Inorganic Chemical Maximum Contaminant Levels, Monitoring Requirements, and Analytical Methods http://www.mass.gov/dep/water/laws/perchlorate-310CMR22-07282006.doc