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Tenjo, nestled in the Cundinamarca department of Colombia at coordinates 4.9167, -74.1667, presents a unique geographic setting influencing its air quality. Situated within the Andean foothills, the town occupies a relatively high elevation, averaging around 2,600 meters (8,530 feet) above sea level. This altitude contributes to lower oxygen levels and can exacerbate the effects of pollutants. The surrounding landscape is characterized by rolling hills, agricultural lands – primarily dedicated to flower cultivation and livestock farming – and patches of native forest. Tenjo lies within the Bogotá Savannah, a high-altitude plateau. Its proximity to Bogotá, a major metropolitan area, means it’s susceptible to pollutant transport from the capital, particularly during periods of stagnant air. The urban-rural gradient is quite pronounced; the town centre is densely populated, while the periphery quickly transitions into agricultural zones. The lack of significant bodies of water immediately adjacent to Tenjo means limited natural dispersion of pollutants. The terrain, while visually appealing, restricts air circulation in certain areas, creating localized pockets of poorer air quality. The prevailing winds, influenced by the Andean topography, play a crucial role in pollutant dispersal, but can also channel pollutants from nearby sources.

Tenjo experiences a relatively consistent climate due to its equatorial location, but distinct wet and dry seasons significantly impact air quality. The drier season, typically from December to February, sees increased dust and particulate matter from agricultural activities and unpaved roads. Lower rainfall means less atmospheric cleansing, leading to a build-up of pollutants. Temperature inversions, common in the mornings due to the altitude and stable atmospheric conditions, trap pollutants near the ground. The wet season, spanning roughly March to November, generally offers improved air quality as rainfall washes away pollutants. However, increased humidity can promote the formation of secondary pollutants. August and September often experience higher levels of pollen due to flowering plants, impacting those with allergies. October and November can see a resurgence of particulate matter as harvesting activities increase. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during the drier months and periods of high pollen. Monitoring local conditions and avoiding peak traffic hours are also advisable. The consistent winds from the east can sometimes bring pollutants from Bogotá, particularly during calm periods.