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Twelve representative samples were selected for chemical characterization using energy dispersive X-rays (EDX) and inductively coupled plasma (ICP). Samples were identified and treated in the laboratory, after undergoing cracking, drying, sieving, and weighing to get less than 75 microns of sediment by using a dry method. Sampling was conducted from february to may 2008, following a random statistical design, in 60 sampling sites on a georeferenced map at UTM 11 North. Lourdes Monserrat MEZA TREJO 1*, Margarito QUINTERO NUÑEZ 2 and Benjamín VALDEZ SALAS 2ġ Facultad de Ingeniería, Unidad Mexicali, Universidad Autónoma de Baja California, México *Corresponding author Instituto de Ingeniería, Universidad Autónoma de Baja California, MéxicoĪ chemical sediment characterization of urban streets in the city of Mexicali at Baja California, Mexico, was conducted to estimate the most important heavy metals along with PM 10 and PM 25 emission factors (EF) to evaluate the amount of particulate matter. Metales pesados en sedimentos de caminos urbanos de la ciudad de Mexicali, México Heavy metals in urban road sediments of the city of Mexicali, Mexico