Chlorinated　polycyclic　aromatic　hydrocarbons　(ClPAHs)　are　a　group　of　halogenated　contaminants　found　in　the　urban　environment　with　a　toxic　potential　similar　to　dioxins.　Little　is　well-known　on　the　distribution　and　characteristics　of　ClPAHs　on　urban　surfaces.　In　this　study,　concentrations　of　20　ClPAH　congeners　were　measured　in　road　dust　and　soil　from　crossroads　along　arterial　traffic,　park　and　lake　areas,　a　chemical　industrial　complex,　waste　incineration　power　plants　nearby,　and　a　steel　factory　in　Shanghai.　ClPAHs　are　ubiquitous　and　log-normally　distribute　in　urban　surface　with　a　range　from　0.27　to　206　ng/g　dw　for　dust,　and　with　a　range　from　0.05　to　94.3　ng/g　dw　for　soils.　The　highest　mean　concentration　of　total　20　ClPAHs　is　found　in　floor　dust　from　a　steel　factory.　ClPyr　and　ClPhe　are　predominant　in　road　dust,　which　infers　that　ClPAHs　detected　in　the　urban　surface　dust　samples　originate　from　vehicle　exhaust.