<span class="word">Premature <span class="word"><span class="changedDisabled">Mortality <span class="word">and <span class="word"><span class="changedDisabled">Costs <span class="word"><span class="changedDisabled">Attributable <span class="word">to <span class="word"><span class="changedDisabled">Imported <span class="word"><span class="changedDisabled">Primary <span class="word">PM2.5 <span class="word">from <span class="word">a <span class="word"><span class="changedDisabled">Densely <span class="word"><span class="changedDisabled">Urbanized <span class="word"><span class="changedDisabled">Metropolis

Previous studies have shown that the mass exchange of atmospheric pollutants between airsheds significantly alters the air quality of regions surrounding large urban metropolises. This study presents estimates of potentially avoidable premature mortality and the annual cost that pollutant exchange may impose on receiving areas. The Hysplit model was used to model the exchange of pollutants for the year 2018 among three Mexican metropolitan areas: the México City metropolitan area, as the main exporter of pollutants, and the metropolitan areas of Toluca and Cuernavaca, as recipient areas. The modeling results were processed in ArcGIS®, and the estimated avoidable premature deaths and costs associated with imported PM2.5 were calculated using BenMap. The main results indicate that the export of PM2.5 from the Mexico City Metropolitan Area in 2018 could have resulted in 19,473 potentially avoidable premature deaths in the two recipient metropoli-tan areas. The impact could represent an annual cost of $12,1977 million for the Toluca Valley metropolitan area and $4,140 million for the Cuernavaca metropolitan area.