Improving the spatial resolution of atmospheric polycyclic aromatic hydrocarbons using passive air samplers in a multi-industrial city

► The high spatial resolution data for atmospheric PAHs in the industrial city are important. ► We used passive air samplers to investigate the source-receptor relationship of PAHs in Ulsan, Korea. ► The levels, patterns, and spatial distribution of PAHs were analyzed. ► Industrial complexes were found to be an important source of PAHs. ► The spatial distribution of PAHs was significantly influenced by wind patterns.