The purpose of this project was to examine the drinking water quality of the prechosen 362 drinking water systems and 38 simple tap-water systems of the 22 municipal counties or cities. The regulated analytes included 13 metals (arsenic, lead, selenium, chromium, cadmium, barium, antimony, nickel, mercury, silver , aluminum, indium and molybdenum ), 1 health affecting substance (cyanide), 3 disinfection byproducts (total trihalomethanes (TTHMs), bromate and haloacetic acids (HAA5) ), 15 volatile organics (trichoroethylene, carbon tetrachloride, 1,1,1-trichloroethane, 1,2-dichloroethane, vinyl chloride, benzene, 1,4-dichlorobenzene, 1,1-dichloroethene, dichloromethane, 1,2-dichlorobenzene, xylenes, cis- and trans- 1,2-dichloroethene, tetrachloroethene and toluene), 13 pesticides (endosulfan, lindane, butachlor, 2,4-D, paraquat, methomyl, carbofuran, Isoprocarb, methamidophos, diazinon, parathion, EPN, and monocrotophos) and 1 persistent volatile organic compound (dioxins), which accounted for a total of 46 analytes. 　　Water examined for all tested locations met the required drinking water criteria, which has a passing rate of 98.9% and 97.5%. All analytes tested met the required drinking water criteria, which had a passing rate all of 99.9%. 　　The results indicated the content of bromate and Total Trihalomethanes (TTHMs) exceeded the drinking water quality regulations include 5 drinking water systems.

Drinking Water Quality Standards、Total Trihalomethane、Aluminum