Bouanri Air Quality Index (AQI)

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Bouanri, a municipality within Benin’s Borgou Department, occupies a position in the country’s central-northern region, at coordinates 10.2000° N, 2.8667° E. The terrain is generally undulating, characteristic of the Benin Plateau, with elevations ranging between 200 and 400 meters above sea level. This plateau landscape, a remnant of ancient geological formations, influences local drainage patterns and air circulation. Bouanri is not directly adjacent to a major body of water, though smaller rivers and streams dissect the surrounding agricultural lands. The dominant land use is subsistence farming, primarily focused on maize, yams, and cotton, creating a significant rural-urban gradient as the city serves as a market and administrative centre for the surrounding villages. While Bouanri itself isn’t heavily industrialised, the broader Borgou region experiences some activity related to agricultural processing and small-scale manufacturing. Dust from unpaved roads and agricultural activities is a significant factor. The city’s location, coupled with prevailing wind patterns, means that pollutants generated in surrounding areas can be transported into Bouanri, impacting local air quality. The urban layout is relatively dispersed, with a mix of traditional housing and more modern structures, influencing ventilation and pollutant dispersion.

Bouanri experiences a distinct tropical climate with a pronounced wet and dry season cycle, heavily influencing air quality. The dry season, typically from November to March, sees a peak in particulate matter pollution. Reduced rainfall means less atmospheric cleansing, and increased dust resuspension from agricultural activities and unpaved roads. Harmattan winds, originating from the Sahara, can transport significant amounts of dust southward, exacerbating the problem. January and February are generally the months with the poorest air quality. The transition period, April-May, brings increasing humidity and sporadic rainfall, offering a temporary improvement. The wet season, from June to October, provides the most significant relief. Frequent rainfall effectively washes pollutants from the atmosphere, leading to cleaner air. However, high humidity can also promote the growth of mold and allergens, impacting respiratory health. August and September, while having the cleanest air overall, can experience localised flooding which can stir up sediment. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during the dry season and take precautions during periods of high humidity. Monitoring wind direction is crucial, as pollutants can be concentrated depending on prevailing breezes.