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Quemado de Güines, nestled in the Villa Clara province of Cuba, occupies a geographically significant position within the island’s central plains. Located at coordinates 22.7900, -80.2561, the city sits approximately 120 meters above sea level, contributing to relatively stable atmospheric conditions. The surrounding landscape is predominantly flat to gently rolling agricultural land, heavily dedicated to sugarcane and citrus cultivation. This agricultural dominance is a key factor influencing local air quality, with seasonal burning practices and fertilizer use contributing to particulate matter and ammonia emissions. The city isn’t directly on the coast, but is roughly 30km inland from the Bay of Cardenas, meaning maritime influences are present but moderated. Quemado de Güines functions as a regional service centre for the surrounding rural communities, creating a distinct urban-rural gradient. While not a major industrial hub, smaller-scale processing facilities related to agriculture are present. The terrain’s flatness limits natural dispersion of pollutants, and the prevailing trade winds, while generally easterly, can become stagnant during certain periods, exacerbating localised pollution events. The city’s position within a broad valley further contributes to potential air stagnation, particularly during the drier months. Understanding this interplay of geography and land use is crucial for assessing and mitigating air quality challenges.

Air quality in Quemado de Güines follows a distinct seasonal pattern dictated by Cuba’s tropical climate. The dry season, spanning November to April, typically sees the poorest air quality. Reduced rainfall means less atmospheric cleansing, and agricultural burning for sugarcane harvest is most prevalent during these months, releasing significant particulate matter. Temperature inversions, common during the cooler nights of the dry season, trap pollutants near ground level. February and March are often the most challenging months. The transition period of May brings increased rainfall and a gradual improvement in air quality. The wet season, from May to October, generally offers the cleanest air, with frequent rainfall effectively washing away pollutants. However, increased humidity can also promote the formation of mould spores, impacting respiratory health. September and October, coinciding with the tail end of the hurricane season, can experience periods of stagnant air following storm passage. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during the dry season and monitor conditions after heavy rainfall. Wind patterns shift during the wet season, offering better dispersion, but localised flooding can also stir up pollutants from saturated soils.