Polycyclic　aromatic　hydrocarbons　(PAHs)　and　their　polar　derivatives　(oxygenated　PAHs:　OPAHs　and　azaarenes:　AZAs)　were　characterized　in　fine　particulates　(PM2.5)　emitted　from　indoor　coal　combustion.　Samples　were　collected　in　Xuanwei　(Yunnan　Province),　a　region　in　China　with　a　high　rate　of　lung　cancer.　A　sample　from　the　community　with　the　highest　mortality　contained　the　highest　total　concentration　of　PAHs,　OPAHs　and　AZAs　and　posed　the　highest　excess　cancer　risk　from　a　lifetime　of　inhaling　fine　particulates.　Positive　correlations　between　total　carbonyl-OPAHs,　total　AZAs　and　total　PAHs　implied　that　the　emissions　were　dependent　on　similar　factors,　regardless　of　sample　location　and　type.　The　calculated　cancer　risk　ranged　from　5.23-10.7　x　10(-3),　which　is　higher　than　the　national　average.　The　risk　in　each　sample　was　similar　to　1-2　orders　of　magnitude　higher　than　that　deemed　high　risk,　suggesting　that　the　safety　of　these　households　is　in　jeopardy.　The　lack　of　potency　equivalency　factors　for　the　PAH　derivatives　could　possibly　have　underestimated　the　overall　cancer　risk.　(C)　2016　Elsevier　Ltd.　All　rights　reserved.