Diondiori Air Quality Index (AQI)

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Diondiori, a town in the Mopti Region of Mali, sits at approximately 14.6167°N latitude and 4.7667°W longitude, placing it within the Sahelian zone. The terrain is largely flat, characteristic of the Inner Niger Delta, with an elevation hovering around 200 meters. This low-lying geography significantly influences air quality, as dust and particulate matter are easily mobilized and remain suspended. The town is situated relatively close to the Niger River, though not directly on its banks, and benefits from the river’s influence on local microclimates. However, the surrounding landscape is predominantly savannah and scrubland, prone to seasonal wildfires and wind erosion, major contributors to particulate pollution. Diondiori functions as a regional market centre, serving surrounding agricultural communities. The urban-rural gradient is pronounced; the town itself is relatively small (population approximately 20,160), but is surrounded by dispersed rural settlements engaged in subsistence farming and livestock rearing. Limited industrial activity exists within Diondiori itself, but regional transport routes passing through contribute to vehicle emissions. The lack of paved roads in many areas exacerbates dust resuspension. The Sahelian climate, with its distinct wet and dry seasons, dictates the dominant pollution patterns, with dust storms being particularly prevalent during the dry Harmattan winds.

Diondiori’s air quality follows a strong seasonal rhythm dictated by the wet and dry seasons. The dry season, roughly November to May, is characterized by consistently poorer air quality. The Harmattan winds, originating from the Sahara, bring vast quantities of dust and sand, dramatically increasing particulate matter concentrations. January and February are typically the worst months for respiratory health due to these dust storms. Temperatures are lower during this period, and temperature inversions can trap pollutants near the ground. The transition to the wet season (June-October) brings a significant improvement. Rainfall effectively washes away much of the accumulated dust, and increased humidity suppresses dust resuspension. However, even during the wet season, localized pollution can occur from biomass burning for agricultural purposes and cooking. August and September, while generally cleaner, can experience short-term spikes in pollution from these sources. Sensitive groups – children, the elderly, and those with pre-existing respiratory conditions – should limit strenuous outdoor activity during the dry season and be prepared to use respiratory protection when dust storm warnings are issued. Monitoring local fire activity during the wet season is also advisable.