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Santa Rosa de Cabal, nestled in the heart of Colombia’s Risaralda department, occupies a dramatic and geographically complex position within the Andean foothills. Located at approximately 4.8667° N, 75.6167° W and an elevation of around 2,100 meters (6,889 feet) above sea level, the city’s terrain is characterized by steep slopes and deep valleys carved by numerous streams and rivers, most notably the Río Quindío. This mountainous landscape significantly influences local air circulation patterns. The surrounding landscape is dominated by coffee plantations, a defining feature of the region’s economy and land use, interspersed with patches of cloud forest and remnant primary vegetation. Santa Rosa de Cabal sits within the Paisa Region, a densely populated and economically vibrant area known for its coffee production and tourism. The urban fabric is a blend of traditional colonial architecture and modern development, sprawling across the valley floor and clinging to the hillsides. The urban–rural gradient is relatively sharp; the city quickly transitions to agricultural land and forested areas. While not directly adjacent to a major lake or river system beyond the Río Quindío, the region’s high rainfall and numerous waterways contribute to humidity levels. The proximity to larger industrial centers like Pereira, approximately 40 kilometers to the south, means Santa Rosa de Cabal can be susceptible to transported pollutants, although its elevation and prevailing winds often mitigate this effect. The steep topography and limited flat land constrain urban expansion and influence the dispersion of any locally generated air pollutants.

Santa Rosa de Cabal experiences a tropical rainforest climate with distinct wet and dry seasons rather than the four traditional seasons. The wet season, typically spanning from April to October, brings consistent rainfall and high humidity, often resulting in reduced air quality due to increased moisture trapping pollutants near the ground. Fog is a frequent occurrence during these months, further hindering dispersion. The dry season, from November to March, generally sees improved air quality as drier conditions promote better ventilation. However, periods of stagnant air can still occur, particularly during temperature inversions, which are more common in the cooler months of December and January. These inversions trap pollutants in the valley, leading to localized air quality concerns. Agricultural burning, a common practice during the dry season to clear land for coffee cultivation, can significantly contribute to particulate matter pollution, especially in areas surrounding the city. During the wettest months (May-June), rainfall helps to cleanse the atmosphere, but the increased humidity can exacerbate respiratory issues for sensitive individuals. The city’s elevation contributes to cooler temperatures, which can intensify temperature inversions. Individuals with respiratory conditions, such as asthma, and the elderly are advised to limit outdoor activity during periods of fog or stagnant air, particularly in the mornings. Children are also more susceptible to the effects of air pollution and should be monitored closely. Maintaining indoor air quality through ventilation and air purification can be beneficial during periods of poor air quality.