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Bouaké, Ivory Coast's second-largest city, occupies a strategic position in the heart of the country's central plateau region within Vallée du Bandama. Situated at approximately 350 meters above sea level, the city lies on gently undulating terrain characterized by savanna-woodland transitions, creating a distinct urban-rural gradient where the dense urban core gradually gives way to agricultural peripheries. This elevation provides some natural ventilation but is insufficient to fully disperse pollutants accumulating in the basin-like topography. The city's location between the Bandama River to the west and the N'Zi River to the east creates a hydrological corridor that influences local humidity patterns and occasionally traps airborne particulates during stagnant conditions. Bouaké functions as a major transportation and commercial hub connecting northern agricultural zones with coastal economic centers, resulting in significant vehicular emissions from transit routes converging here. The surrounding landscape consists primarily of cashew, cotton, and yam cultivation, with seasonal agricultural burning contributing to regional haze. Urban expansion has created a patchwork of formal and informal settlements with varying air quality exposures, while limited industrial activity focuses on textile processing and food manufacturing. The city's position away from coastal breezes means it experiences less natural air flushing than Abidjan, allowing pollutants from domestic biomass burning, aging vehicle fleets, and road dust to accumulate more persistently in the urban atmosphere.

Bouaké's air quality follows distinct seasonal patterns shaped by West Africa's monsoon regime. During the long dry season from November to March, Harmattan winds transport Saharan dust southward, creating hazy conditions that peak in December and January when particulate levels are highest. These months combine dust intrusion with increased domestic biomass burning for heating and cooking, creating challenging conditions for respiratory health. The short dry season in August brings another pollution peak as agricultural burning coincides with reduced rainfall, though this period is less severe than the Harmattan season. From April to July, the major rainy season provides natural cleansing through frequent downpours that wash pollutants from the air, making this the most favorable period for outdoor activities. The minor rainy season in September and October offers similar benefits with moderate rainfall improving visibility. Temperature inversions occasionally develop during cool, calm nights in the dry seasons, trapping pollutants near ground level until morning breezes disperse them. Sensitive groups including children, elderly residents, and those with asthma or cardiovascular conditions should limit prolonged outdoor exposure during Harmattan months, particularly in early mornings when inversion layers are strongest. The rainy seasons present optimal windows for outdoor exercise and activities, though high humidity may exacerbate symptoms for some individuals with respiratory conditions.