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Tixkokob, nestled in the Yucatán Peninsula of Mexico, presents a unique geographic context influencing its air quality. Located at coordinates 21.0022, -89.3936, the city sits on relatively flat terrain characteristic of the limestone shelf that defines this region. With a population of approximately 10,968, Tixkokob is a primarily rural community transitioning with some urban development. The surrounding landscape is dominated by tropical forest and agricultural lands, particularly *henequén* (sisal) plantations, historically significant to the Yucatán’s economy. The city’s elevation is low, averaging around 15 meters above sea level, contributing to limited atmospheric dispersion of pollutants. Proximity to the Gulf of Mexico, roughly 60 kilometers to the north, introduces humidity and potential for sea breezes, but these breezes are not always sufficient to fully clear localized emissions. Unlike industrialised areas, Tixkokob’s pollution sources are largely diffuse, stemming from open burning of agricultural waste, residential wood-burning for cooking, and vehicle emissions along the regional highway network. The urban-rural gradient is pronounced; air quality degrades closer to the town centre due to concentrated human activity, while surrounding areas benefit from natural filtration by vegetation. The porous limestone bedrock also impacts groundwater quality, potentially influencing dust levels.

Tixkokob experiences a distinct wet and dry season, profoundly impacting air quality. The dry season, typically from February to May, sees a peak in particulate matter pollution. Reduced rainfall means less atmospheric cleansing, and agricultural burning for land preparation becomes common, releasing significant smoke and ash. Strong *norte* winds can occasionally sweep through, temporarily improving conditions, but often carrying dust from further afield. The hottest months, April and May, exacerbate the problem through increased ground-level ozone formation. The wet season, from June to November, generally brings improved air quality. Frequent rainfall washes away pollutants, and humidity reduces dust suspension. However, stagnant air during periods of reduced rainfall within the wet season can lead to localised build-ups of pollutants. December and January offer the most favourable conditions, with cooler temperatures and occasional rainfall. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor exertion during the peak of the dry season (March-May). Monitoring local fire reports and avoiding areas with visible smoke is crucial. The transition months (November/December and May/June) can be unpredictable, requiring increased vigilance.