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Atitalaquia, Hidalgo, Mexico, occupies a strategically important position within the semi-arid Huasteca Potosina region, nestled within the foothills of the Sierra Gorda Biosphere Reserve. Located at approximately 20.0583° N, -99.2208° W and an elevation of around 2,100 meters (6,889 feet) above sea level, the city benefits from a relatively cool, highland climate. The surrounding landscape is characterized by a dramatic transition from steep, forested slopes to more open agricultural lands, primarily dedicated to maize, beans, and squash cultivation. This agricultural activity, while vital to the local economy, contributes to particulate matter emissions, particularly during planting and harvesting seasons. Atitalaquia sits on the edge of an urban–rural gradient; the municipality blends small-town charm with increasing suburban sprawl as it connects to larger regional centers. The nearby El Salto de Atitalaquia waterfall and the surrounding canyons create localized microclimates that can trap pollutants. The region's geology, dominated by volcanic rock and sedimentary formations, influences drainage patterns and soil composition, impacting dust generation. While not directly adjacent to major rivers, the area receives runoff from the Sierra Gorda, contributing to localized humidity. The proximity to the industrial belt of the Bajío region, though not immediately adjacent, means that long-range transport of pollutants from larger industrial centers can occasionally affect air quality, especially during periods of stagnant atmospheric conditions. The terrain’s topography significantly influences wind patterns, often leading to localized air stagnation and pollutant accumulation.

Atitalaquia’s air quality exhibits a distinct seasonal pattern dictated by its highland climate and agricultural practices. The dry season, typically spanning from November to April, often sees increased particulate matter concentrations. This is due to reduced rainfall, leading to drier soils and increased dust resuspension from agricultural fields and unpaved roads. Temperature inversions, common during the cooler nights of this period, trap pollutants near the ground, exacerbating the issue. The months of December and January frequently experience the most challenging air quality conditions. The wet season, from May to October, brings relief as rainfall washes away accumulated pollutants and reduces dust. However, agricultural burning, a traditional practice for land clearing and crop residue disposal, can significantly degrade air quality during the transition months of April and May, and again in September and October. Fog, particularly prevalent during the cooler months, can also trap pollutants, reducing visibility and impacting respiratory health. Wind patterns play a crucial role; periods of calm winds allow pollutants to accumulate, while stronger winds disperse them. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should limit outdoor activity during periods of stagnant air or agricultural burning. During the dry season, it's advisable to wear masks when outdoors, especially during peak hours of agricultural activity. Maintaining indoor air quality through proper ventilation and air filtration is also recommended throughout the year, but particularly during periods of elevated pollution.