Contribution of LPG-derived emissions to air pollution in the metropolitanarea of Guadalajara City

Measurements of hydrocarbon (HC) emissions generated by the use of liquefie d petroleum gas (LPG) in the metropolitan area of Guadalajara City (MAG) ar e presented in this work. Based on measurements in the course of distributi on, handling, and consumption, an estimated 4407 tons/yr are released into the atmosphere. The three most important contributors to LPG emissions were refilling of LPG-fueled vehicles and commercial and domestic consumption. The MAG shows a different contribution pattern of LPG emission sources comp ared with that of the metropolitan area of Mexico City (MAMC). These result s show that each megacity has different sources of emissions, which provide s more accurate strategies in the handling procedures for LPG to decrease t he impact in O-3 levels. This work represents the first evaluation performe d in Guadalajara City, based on current measurements, of the LPG contributi on to polluting emissions.