RESUMEN En los ultimos tiempos ha tomado un gran auge en los paises del tercer mundo, incluidos los de America Latina, el estudio de la exposicion humana a las emisiones de combustion, incluyendo las particulas ultrafinas (PM 2,5 ) y componentes mutagenicos y carcinogenos como los hidrocarburos aromaticos policiclicos (HAPs). En este trabajo se identifico en la ciudad de Cucuta un grupo de HAPs reconocidos por su afectacion a la salud de la poblacion; los HAPs encontrados fueron: metilcriseno, benzo[a]antraceno, benzo[j]fluoranteno, benzo[b] fluoranteno, benzo[a] pireno, dibenzo [a,l] pireno, dibenzo[a,e] pireno, benzo[c] fluoreno, benzo[k] fluoranteno, Indeno[1,2,3-cd] pireno, dibenzo[a,h]antraceno y benzo[g,h.i]perileno. Adicionalmente tambien se evaluo in vitro usando el ensayo cometa, el efecto genotoxico del material particulado PM 2,5 extraido con acetona y diclorometano. ABSTRACT The study of human exposure to combustion emissions, including ultrafine particulate matter (PM2,5) has increased recently in the thirld world countries, including those in Latin America. This paper identifies a group of polyciclic aromatic hydrocarbons (PAHs) in the city of Cucuta, Colombia. Those PAHs are recognized by their effects on human health. PAHs found were: Methylchrysene, Benzo [a] anthracene, Benzo [j ] fluoranthene, Benzo [b] fluoranthene, Benzo [a] pyrene, dibenzo [a, l] pyrene, dibenzo [a, e] pyrene, Benzo [c] fluorene, benzo [k] fluoranthene, indeno [1,2,3 -cd] pyrene, dibenzo [a, h] anthracene and benzo [g, hi] perylene. The genotoxic effect of the particulate matter extracted with acetone and dichlorometane, was also evaluated in vitro using the commet assay.