Ticul Air Quality Index (AQI)

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Ticul, a vibrant city in the Yucatán Peninsula of Mexico, sits roughly 160 kilometers southeast of Mérida, the state capital. Its coordinates, 20.3953°N, -89.5339°W, place it within a relatively flat limestone plateau landscape, characteristic of the region. The terrain is gently undulating, lacking significant elevation changes, with an average altitude around 25 meters above sea level. This low elevation contributes to limited natural air dispersion. Ticul is surrounded by a mosaic of agricultural lands, primarily dedicated to henequen (sisal) cultivation, alongside increasing areas of cattle ranching and small-scale farming. While not heavily industrialized, the city serves as a regional commercial hub for surrounding rural communities, leading to increased vehicular traffic. The urban-rural gradient is pronounced; the city core experiences higher population density and activity, while the periphery quickly transitions into open agricultural fields. Proximity to the Gulf of Mexico, approximately 80 kilometers north, introduces humidity and potential for long-range transport of pollutants. The porous limestone bedrock, while providing natural filtration, also limits the retention of pollutants in the soil, potentially leading to groundwater contamination. The lack of substantial natural barriers to wind flow can both aid and hinder pollutant dispersal, depending on prevailing conditions.

Ticul experiences a distinct wet and dry season, rather than traditional four seasons. Air quality in Ticul is most compromised during the dry season, typically from February to May. This period sees reduced rainfall, leading to dust resuspension from agricultural lands and unpaved roads. The lack of precipitation also inhibits the natural cleansing of the atmosphere. Stagnant air masses, coupled with temperature inversions common in the mornings, trap pollutants near the ground. March and April are often the months with the poorest air quality. Conversely, the wet season, spanning June to November, brings significant improvements. Frequent rainfall washes away particulate matter, and increased humidity promotes pollutant deposition. However, the wet season can also see localized flooding, potentially releasing contaminants from agricultural runoff. December and January offer a transitional period with generally favourable conditions. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during the peak of the dry season. Monitoring wind direction is crucial; winds from the northwest can carry pollutants from more industrialized areas further inland. Maintaining good ventilation indoors and using air purifiers are recommended during periods of poor air quality.