This study attempted to determine potential health risks of BTEX for workers at an active solid waste landfill site. After gas samples were collected from the LFG release points of the passive
vent pipes, both carcinogenic and non-carcinogenic health risks related to BTEX were estimated based on the mean concentrations. The mean concentrations of benzene, toluene, ethylbenzene, and
xylenes were determined as 140.3, 1271.7, 239.9, and 341.3 g/m3,respectively. The mean cancer risk over a period of 70 years was estimated to be 6.75E−05, or 67.5 in a million, primarily due to inhalation of benzene. This risk is lower than the US EPA’s generally acceptable excess upper-bound lifetime cancer risk of one in ten thousand. The non-carcinogenic health risks in terms of HRs for toluene, ethylbenzene, and xylenes, on the other hand, were found to be 0.015, 0.014, and 0.195, respectively. These mean values are acceptable because the HRs are lower than the specified level of 1.0. These findings reveal that landfill BTEX emissions do not pose a health threat to workers at the landfill site. In addition, air dilutions of BTEX emissions at the landfill further reduce concentrations below which do not pose adverse health effects to population living in the vicinity of landfill site.