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Batié, nestled in Burkina Faso’s Sud-Ouest region, occupies a geographically significant position within the country’s transition zone between the Sahelian and Sudanian savannas. Located at approximately 9.8833° latitude and -2.9167° longitude, the town sits at an elevation of roughly 330 meters above sea level, contributing to a relatively mild climate compared to more northerly regions. The surrounding landscape is characterized by undulating grasslands and sparse woodlands, typical of the Sahelian-Sudanian ecotone. This area is predominantly agricultural, with small-scale farming practices dominating the rural areas immediately surrounding Batié, including the cultivation of millet, sorghum, and maize. The urban–rural gradient is gradual, with agricultural fields often bordering the town’s periphery. While Batié lacks direct proximity to major rivers or lakes, seasonal watercourses and ephemeral pools are present, influencing local humidity and vegetation patterns. The town’s location, away from major industrial centers, initially suggests lower pollution risks. However, the prevalence of wood-fired cooking and traditional charcoal production, common practices in the region, coupled with vehicular traffic (increasing with improved road infrastructure), introduces localized air quality challenges. Dust storms, characteristic of the Sahel, are a recurring feature, significantly impacting particulate matter concentrations, particularly during the dry season. The terrain, a gently sloping plateau, can influence the dispersion of pollutants, potentially leading to localized accumulation in certain areas of the town.

Batié’s air quality follows a distinct seasonal pattern dictated by its tropical savanna climate. The dry season, spanning roughly November to May, presents the most significant air quality concerns. Characterized by minimal rainfall and persistent sunshine, this period is prone to intense dust storms originating from the Sahara and the Sahelian regions to the north. These events dramatically increase particulate matter concentrations, impacting visibility and respiratory health. Temperature inversions, common during the cooler nights of the dry season, can trap pollutants near the ground, exacerbating the problem. The months of January and February often experience the highest levels of dust-related pollution. Conversely, the wet season (June to October) brings a period of relative improvement. Rainfall effectively washes pollutants from the atmosphere, and increased humidity can help to settle dust particles. However, biomass burning associated with agricultural practices, particularly after the harvest, can introduce localized smoke plumes, temporarily degrading air quality. The monsoon winds, though beneficial in dispersing pollutants overall, can occasionally carry smoke from distant agricultural fires. Sensitive groups, including children, the elderly, and individuals with pre-existing respiratory conditions, should exercise caution during the dry season, limiting outdoor activities during peak dust storm periods and avoiding areas with heavy vehicular traffic. During the wet season, while generally better, vigilance regarding smoke from agricultural burning remains important, particularly in rural areas surrounding Batié.