Are man-made organic compounds in source and treated water?
Yes. About one-half (134) of the organic compounds analyzed in this study were detected in at least one source-water sample collected at the nine source-water intakes. A total of 119 compounds were not detected at all. The most commonly detected compounds in source water were the disinfection by-product, chloroform; the herbicides simazine, atrazine, metolachlor, prometon, 2,4-D, and deethylatrazine (DEA); and the fragrance hexahydrohexamtheylcyclopentabenzopyran (HHCB).