The purpose of this project is to examine the water quality of the pre-chosen 164 drinking water systems and 36 simple tap-water systems of the 25 municipal counties(or cities). The items being tested include heavy metals (As, Pb, Se, Cr, Cd, Ba, Sb, Ni, Hg, Ag), volatile organics (trichoroethylene, carbon tetrachloride, 1,1,1-trichloroethane, 1,2-dichloroethane, vinyl chloride, benzene, 1,4-dichlorobenzene, 1,1-dichloroethene), pesticides(Endosulfan(I & II), Lindane, Butachlor, 2,4-D, paraquat, methomyl, carbofuran, MIPC, methamidophos, diazinon, parathion, EPN, monocrotophos), fluoride and THMs , a total of 33 items. 　　The analytical results indicates that most of the analytes were found to be not detected in the drinking water systems except very low concentrations of Sb, 1,1,1-trichloroethane and paraquat were detected in some systems. All of the analytes were found to be not detected in the simple tap water systems except trace As, Hg, THMs were found in some system. The results indicated that only one value of As at one site of Yun-Lin county which did not meet the regulation, the test results for rest of the items all in compliance which the drinking water quality standards.

Drinking Water Quality Standards, Total Trihalomethane, Pesticides