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Aguada de Pasajeros, nestled within the province of Cienfuegos, Cuba, occupies a strategically important location on the southern coast of the Jagua-Campeche peninsula. Its coordinates (22.3847, -80.8461) place it within a subtropical climate zone, significantly influenced by the Caribbean Sea. The city’s terrain is gently undulating, transitioning from coastal plains to slightly elevated ground inland, a characteristic of the peninsula’s geology. This topography can subtly influence local wind patterns and, consequently, the dispersion of pollutants. The immediate surrounding landscape is a blend of agricultural land – primarily sugarcane fields and smaller plots dedicated to fruit and vegetable cultivation – and scrubland typical of the Cuban dry forest ecoregion. The proximity to the Caribbean Sea is a defining feature, moderating temperatures and introducing maritime influences on air quality, including occasional salt spray. Further inland, the landscape gradually shifts to more rugged terrain as the peninsula extends eastward. Cienfuegos, a larger urban center, lies approximately 25 kilometers to the north, representing the closest significant industrial and population hub. This proximity means Aguada de Pasajeros experiences an urban–rural gradient, with increasing rural character as one moves away from the coastal areas. While not directly within a major industrial belt, the sugarcane processing activities in the region and occasional agricultural burning practices can contribute to localized air quality fluctuations. The city’s coastal location also makes it susceptible to the transport of pollutants from distant sources via prevailing winds.

Aguada de Pasajeros experiences a distinct wet and dry season pattern, profoundly impacting its air quality. The dry season, typically spanning from November to April, is characterized by lower humidity and increased sunshine. While this might seem beneficial, it often leads to a greater concentration of particulate matter due to reduced rainfall to wash pollutants from the atmosphere. Agricultural burning, a common practice for land clearing and sugarcane preparation, intensifies during this period, releasing significant amounts of smoke and contributing to hazy conditions. The lack of consistent rainfall allows these particles to linger. Conversely, the wet season (May to October) brings frequent showers and thunderstorms, naturally cleansing the air and reducing particulate concentrations. However, the increased humidity can exacerbate respiratory issues for sensitive individuals. During the transition months (April/May and October/November), unstable atmospheric conditions and shifting wind patterns can lead to unpredictable air quality fluctuations. Temperature inversions, where a layer of warm air traps cooler air near the ground, are less frequent than in more temperate climates but can still occur, particularly during calmer periods, leading to pollutant accumulation. The months of January and February, within the dry season, are generally periods to exercise caution for those with respiratory sensitivities, limiting prolonged outdoor activity during peak burning periods. Conversely, June and July, within the wet season, typically offer the most favorable air quality conditions. Sensitive groups, including children, the elderly, and individuals with pre-existing respiratory conditions, should monitor local conditions and take precautions during periods of agricultural burning or stagnant air.