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Puerto Boyacá, nestled in the department of Boyacá, Colombia, occupies a geographically significant position within the Eastern Ranges of the Andes. Located at approximately 6°N, 74°W and an elevation of around 2,150 meters (7,050 feet) above sea level, the city experiences a cool, temperate climate characteristic of the Colombian highlands. The surrounding landscape is dominated by rolling hills, steep slopes, and verdant valleys, typical of the Andean foothills. This terrain significantly influences air circulation patterns; the valley location can trap pollutants, particularly during periods of low wind. The city’s proximity to agricultural zones, primarily dedicated to potato and vegetable cultivation, introduces potential sources of particulate matter from agricultural practices, including burning of crop residues, though regulations aim to mitigate this. While not directly adjacent to major rivers, the presence of smaller streams and irrigation channels contributes to localized humidity, which can affect the dispersion of pollutants. The urban–rural gradient around Puerto Boyacá is relatively gradual, with small farming communities and scattered rural settlements blending into the urban fabric. The city itself exhibits a compact urban character, with a central plaza and radiating residential areas. The lack of extensive industrial belts within the immediate vicinity reduces the likelihood of heavy industrial emissions, but transportation-related pollution from vehicles remains a factor, compounded by the hilly terrain which can impede efficient traffic flow and increase emissions. The surrounding mountains act as a barrier, potentially hindering the dispersal of pollutants and contributing to localized air quality challenges.

Puerto Boyacá’s air quality follows a distinct seasonal pattern dictated by its tropical highland climate, exhibiting a pronounced wet and dry season cycle. The dry season, typically spanning December to March, often sees a slight increase in particulate matter concentrations. This is partly attributable to reduced rainfall, which limits the natural cleansing effect of precipitation, and potentially increased agricultural burning, although enforcement of regulations is intended to minimize this. Temperature inversions, common during the cooler nights of the dry season, can trap pollutants near the ground, exacerbating localized air quality issues. Conversely, the wet season (April to November) brings more frequent rainfall, which effectively washes pollutants from the atmosphere, leading to improved air quality. However, periods of prolonged fog, particularly during the transition months, can temporarily reduce visibility and trap moisture-borne pollutants. Wind patterns are generally variable, but stronger winds during the wet season help disperse pollutants. The months of January and February, coinciding with the driest period, may present slightly less favorable conditions for those with respiratory sensitivities. Individuals with asthma or other respiratory conditions should be mindful of potential increases in particulate matter during these months and consider limiting strenuous outdoor activity on days with stagnant air. During the wetter months, while overall air quality is generally better, those with allergies may experience increased pollen exposure. Maintaining indoor air quality through proper ventilation and air filtration is advisable year-round, particularly for vulnerable populations including children and the elderly.