The mean PCDD/F concentrations in ambient air nearby Xinzhu, Houli and Renwu municipal solid waste incinerators (MSWIs) are 0.0391, 0.0627 and 0.0804 pg I-TEQ/Nm3, respectively. The mean PCDD/F contents in Ficus leaves nearby these three MSWIs are 2.73、4.76 and 2.83 pg I-TEQ/g, respectively. The mean PCDD/F contents in soil nearby these three MSWIs are 2.23, 3.25 and 3.27 pg I-TEQ/g, respectively. If the data of hot spots of Xinzhu and Houli MSWIs, the mean PCDD/F contents in soil nearby these two MSWIs are 1.19 and 2.70 pg I-TEQ/g. By comparing the PCDD/F concentration of maximum ground concentration sampling sites, upwind sampling sites and downwind sampling sites, the distribution of the PCDD/F concentration isopleths in the atmosphere and the result of PCA, the PCDD/F influence from MSWIs on nearby ambient air, vegetation and soil is not obvious, however, some sampling sites which are around by other stationary emission sources are found with elevated PCDD/F level. The mean PCDD/F concentrations (contents) in ambient air, vegetation and soil of 19 MSWIs are 0.113 pg WHO-TEQ/Nm3, 3.50 pg WHO-TEQ/g and 2.75 pg WHO-TEQ/g, which are 58％, 49％ and 14％ of overseas investigation. From the above scenario, the influence of PCDD/F emission from MSWIs in Taiwan on surrounding environment is not obvious.

dioxin