The purpose of this project is to examine the water quality of the pre-chosen 364 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), fluoride, MBAS and THMs , a total of 21 items. 　　The analytical results indicates that most of the analytes were detected in some drinking water systems except carbon tetrachloride, 1,2-dichloroethane, vinyl chloride, benzene and 1,4-dichlorobenzene were found to be not detected in the systems. Most of the analytes were found in some simple tap water systems except Hg, trichoroethylene, carbon tetrachloride, 1,1,1-trichloroethane, 1,2-dichloroethane, vinyl chloride and benzene were found to be not detected in the systems. 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,,Heavy,Metals