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Acatenango, nestled in the department of Chimaltenango, Guatemala, occupies a dramatically unique geographic position. Situated at 14.5544° latitude and -90.9439° longitude, the city’s defining feature is its proximity to Volcán de Acatenango, one of Guatemala’s most active volcanoes. This location dictates much of the landscape: steep slopes, volcanic soils, and a generally rugged terrain characterize the area. The urban fabric of Acatenango is a blend of traditional Guatemalan architecture and more modern construction, reflecting a community deeply rooted in agricultural practices. The city sits within a transitional zone, exhibiting a gradual urban–rural gradient as one moves away from the central settlement. To the west, the landscape descends into the fertile valleys of the Chimaltenango region, a significant agricultural belt producing maize, beans, and coffee. To the east, the imposing presence of Volcán de Fuego dominates the skyline, frequently releasing plumes of ash and gases. While Acatenango itself lacks major industrial zones, its location within the broader Chimaltenango region means it is influenced by agricultural burning practices common in the surrounding areas. The elevation, averaging around 2,300 meters (7,546 feet) above sea level, contributes to cooler temperatures and can exacerbate air quality issues through temperature inversions, particularly during the dry season. The lack of significant surface water bodies within immediate proximity further limits natural air purification processes, making the city’s air quality highly susceptible to regional pollution sources and volcanic activity.

Acatenango’s air quality follows a distinct seasonal pattern dictated by Guatemala’s tropical climate and the influence of volcanic activity. The dry season, typically spanning November to April, presents the most significant air quality challenges. Reduced rainfall leads to lower atmospheric moisture, hindering the dispersion of pollutants. Temperature inversions are common during this period, trapping emissions close to the ground, especially in the evenings and early mornings. Agricultural burning, a traditional practice for land clearing and crop residue disposal in the surrounding valleys, intensifies during the dry season, contributing significantly to particulate matter pollution. Volcanic emissions from Volcán de Fuego and Volcán de Acatenango themselves can fluctuate unpredictably, adding to the complexity. The wet season, from May to October, brings increased rainfall, which naturally washes pollutants from the atmosphere, leading to improved air quality. However, periods of heavy fog, particularly in the mornings, can temporarily reduce visibility and trap moisture-borne pollutants. Wind patterns also play a crucial role; prevailing winds can either disperse or concentrate pollutants depending on their direction and strength. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, limiting outdoor activity during peak pollution periods. Monitoring local news and advisories regarding volcanic activity is also essential for informed decision-making regarding outdoor exposure.