Mutagenicity, genotoxicity and carcinogenic risk assessment of indoor dust from three major cities around the Pearl River Delta

►TA100(−S9) mutagenicity significantly correlated with SOSIP(−S9) in workplace dust. ►PAHs likely accounted for 45% of the TA98 with S9 mutagenicity of workplace dust. ►Bioaccessibility of PAHs was taken into account in the risk assessment. ►26% of house dust samples resulted in unacceptable cancer risk for children.