Marianao Air Quality Index (AQI)

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Marianao, a municipality within Havana Province, Cuba, occupies a strategically important position just west of the city of Havana, nestled within a gently undulating landscape. Its coordinates (23.0833, -82.4333) place it within a subtropical climate zone, characterized by warm temperatures and distinct wet and dry seasons. The terrain is predominantly low-lying, transitioning from coastal plains to slightly elevated areas towards the interior, facilitating drainage towards the expansive Bay of Havana. This proximity to the bay influences local weather patterns, often bringing humidity and sea breezes. Surrounding Marianao, the landscape is a blend of urban development and agricultural land, with smaller farms and vegetable plots interspersed amongst residential areas. The urban–rural gradient is relatively gradual, reflecting Havana's sprawling metropolitan character. Historically, the area supported sugar cane cultivation, though this has largely diminished, replaced by more diverse agricultural practices. To the east lies the dense urban core of Havana, a significant source of industrial activity and vehicular emissions. To the west, the terrain rises slightly, offering some natural ventilation, but also creating potential for localized pollution accumulation under certain meteorological conditions. The municipality’s location within the Havana metropolitan area means it shares in the broader regional environmental challenges, including traffic congestion and industrial discharge, impacting its air quality profile. The relatively flat topography limits dispersion of pollutants, particularly during periods of stagnant air.

Marianao’s air quality experiences a distinct seasonal rhythm dictated by Cuba’s subtropical climate. The dry season, typically spanning from November to April, often sees clearer skies and reduced humidity, but can also bring periods of stagnant air. Temperature inversions, where a layer of warm air traps cooler air near the ground, are more frequent during these months, hindering the vertical dispersion of pollutants released from Havana’s industrial zones and vehicular traffic. This can lead to localized increases in particulate matter and other airborne contaminants. The wet season, from May to October, brings frequent rainfall and higher humidity. While rainfall naturally helps to cleanse the atmosphere, the increased humidity can exacerbate respiratory issues for sensitive individuals. The intensity of rainfall and the frequency of storms vary considerably, with some months experiencing prolonged periods of rain and others relatively dry spells. Wind patterns are generally variable, with prevailing easterly trade winds offering some degree of ventilation, but these can weaken or shift direction, leading to periods of poor air quality. During the transition months (April/May and October/November), the combination of changing wind patterns and fluctuating humidity can create unpredictable air quality conditions. Sensitive groups, including children, the elderly, and individuals with pre-existing respiratory conditions, should be particularly cautious during periods of stagnant air, especially in the drier months, and monitor local conditions. Outdoor activities are generally more favourable during periods of moderate wind and rainfall.