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. Only 124 drinking water systems of the pre-chosen 164 drinking water systems was tested pesticides. The analytical results indicate that most of the analytes, include carbon tetrachloride, 1,1,1-trichloroethane, 1,2-dichloroethane, vinyl chloride, benzene, 1,4-dichlorobenzene, and pesticides, were found to be not detected in the drinking water systems and in the simple tap water systems. This annual, because of heavy metals detected by ICP-MS, detection limits were lower than ICP-OES, and so detected frequency was higher than past year. The results indicated that the test results all in compliance which the drinking water quality standards.

Drinking Water Quality Standards, Total Trihalomethane, Heavy Metals