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Nentón, nestled within the department of Huehuetenango in Guatemala, occupies a geographically significant position within the western highlands. Located at approximately 15.8000° latitude and -91.7500° longitude, and boasting an elevation of around 2,100 meters (6,889 feet) above sea level, the city experiences a cool, temperate climate characteristic of this high-altitude region. The surrounding landscape is dominated by rugged mountains, steep slopes, and deep valleys, a typical feature of the Sierra Madre de Gualan. This terrain significantly influences local air circulation patterns; valleys can trap pollutants, while the mountainous nature limits dispersion. Nentón sits within a predominantly rural area, transitioning gradually to more densely populated zones further east. Agriculture is a cornerstone of the local economy, with coffee cultivation being particularly prominent, alongside maize and bean farming. While Nentón itself lacks major industrial belts, its proximity to other towns within Huehuetenango department means that agricultural burning practices, a common method for land clearing and crop residue disposal, can contribute to regional air pollution episodes. The urban–rural gradient is relatively smooth, with smaller villages and agricultural plots interspersed throughout the municipality. The lack of significant bodies of water nearby further limits natural air purification processes, making the city’s air quality highly susceptible to local emissions and regional transport of pollutants. The steep topography also creates microclimates, potentially leading to localized variations in air quality within Nentón.

Nentón’s air quality follows a distinct seasonal pattern dictated by Guatemala’s tropical climate, exhibiting a pronounced wet and dry season cycle. The dry season, typically spanning November through April, often sees a noticeable increase in particulate matter. This is largely attributable to agricultural burning practices, intensified during this period as farmers prepare fields for the subsequent planting season. The drier conditions also reduce atmospheric moisture, hindering the natural scavenging of pollutants by rainfall. Temperature inversions, common during the cooler nights of the dry season, can trap pollutants near the ground, exacerbating the issue. Conversely, the wet season (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 early morning hours, can temporarily reduce visibility and trap pollutants close to the ground. Wind patterns are generally variable, but during certain periods, prevailing winds can transport pollutants from neighboring agricultural areas into Nentón. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, particularly during periods of agricultural burning. Outdoor activities are generally more favorable during the wet season, although fog can still pose a visibility challenge. The intensity of agricultural burning can fluctuate year to year depending on rainfall patterns and economic conditions, making it difficult to predict air quality with absolute certainty. Understanding these seasonal influences is crucial for mitigating potential health impacts and promoting responsible agricultural practices.