Technology
http://www.epa.gov/nrmrl/std/cppb/
http://www.jaots.net/
http://en.wikipedia.org/wiki/Reverse_osmosis
http://en.wikipedia.org/wiki/Advanced_oxidation_process
http://science.howstuffworks.com/reverse-osmosis.htm
http://www.frtr.gov/matrix2/section4/4-45.html#site