Sevilla Air Quality Index (AQI)

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Sevilla, nestled within the Valle del Cauca department of Colombia at coordinates 4.2689, -75.9361, is a municipality of approximately 41,153 inhabitants. Its geography is defined by the Andean foothills, transitioning from steeper slopes to the flatter alluvial plains characteristic of the Cauca River valley. The city sits at a relatively low elevation, around 980 meters above sea level, contributing to a warmer climate and influencing atmospheric mixing. Sevilla is strategically positioned along the Cauca River, a vital transportation artery and source of moisture, but also a potential pathway for pollutant dispersal. Surrounding the urban core is a mosaic of agricultural land, primarily sugarcane and banana plantations, alongside smaller-scale coffee cultivation. These agricultural activities contribute to particulate matter through field burning and the use of agricultural chemicals. The urban-rural gradient is relatively sharp, with rapid transitions from densely populated areas to agricultural landscapes. Industrial activity is limited within Sevilla itself, but the broader Valle del Cauca region contains significant industrial centres, particularly around Cali, which can impact air quality through long-range transport of pollutants. The valley’s topography, often experiencing temperature inversions, can trap pollutants, exacerbating air quality issues. The prevailing winds, influenced by the Andean orography, play a crucial role in pollutant dispersion, but can also concentrate them during periods of calm.

Sevilla’s air quality follows a distinct wet-dry seasonal pattern rather than traditional four seasons. The drier months, typically December through March, witness the poorest air quality. Reduced rainfall means less atmospheric cleansing, and increased dust from agricultural activities and unpaved roads becomes prevalent. Temperature inversions are also more common during this period, trapping pollutants near the ground. Conversely, the wetter seasons, from April to November, generally offer improved air quality. Frequent rainfall effectively washes pollutants from the atmosphere, and higher humidity can suppress dust. However, even during the wet season, localized pollution spikes can occur due to agricultural burning, particularly after harvests. August and September often see increased particulate matter from sugarcane burning. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during the drier months. Monitoring wind patterns is crucial; winds from the direction of agricultural zones or industrial areas in the broader Valle del Cauca region can signal poorer air quality. Fog, common in the mornings, can also trap pollutants, worsening conditions locally. Staying informed about local weather forecasts and agricultural practices is key to protecting respiratory health.