By M.J. Coplan Massachusetts registered professional engineer
(Re: “On the water front,” Jan. 19, page 1) Ninety-two percent of U.S. fluoridated water is treated with fluosilicic acid, a by-product collected in processes used to convert “phosphate rock” into phosphate fertilizer and recover uranium also in that rock.
Originally published in the Santa Monica Daily Press print edition on January 29, 2007. Read the original PDF.