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Beni Tamou, nestled within the Blida Province of Algeria, occupies a geographically significant position in the country’s north-central region. Located at coordinates 36.5333° N, 2.8167° E, the city is situated on the slopes of the Tell Atlas mountain range, a defining feature of Algeria’s landscape. This mountainous terrain influences local wind patterns and can contribute to temperature inversions, trapping pollutants in the valley. The surrounding landscape is characterised by a mix of agricultural lands – primarily olive groves and vineyards – and semi-arid steppe. Beni Tamou isn’t directly adjacent to a major body of water, though it benefits from seasonal streams descending from the Atlas Mountains. The urban-rural gradient is relatively sharp; the city itself is compact with a population of approximately 33,846, quickly transitioning to agricultural fields and then more rugged, sparsely populated mountainous areas. While not a major industrial hub, the presence of smaller-scale industrial activity related to agricultural processing and local manufacturing contributes to the overall pollution profile. The city’s elevation, approximately 200-300 meters above sea level, further impacts air circulation and pollutant dispersion. The proximity to Blida city, a larger urban centre, also means Beni Tamou can experience pollutant transport from regional sources.

Air quality in Beni Tamou experiences a distinct seasonal rhythm. The summer months (June-August) often see a rise in particulate matter due to dry, dusty conditions and increased agricultural activity, including harvesting and land preparation. Hot, stable air masses can lead to temperature inversions, trapping pollutants near the ground. Autumn (September-November) brings a temporary improvement as rainfall washes away some of the accumulated dust and pollutants, but cooler temperatures can also exacerbate inversion conditions. Winter (December-February) is generally the period of best air quality, with increased precipitation and stronger winds aiding dispersion, though domestic heating using wood and other solid fuels can contribute to localised smoke pollution. Spring (March-May) is a transitional period, with increasing temperatures and agricultural activity leading to a gradual deterioration in air quality. March and April can be particularly problematic due to windblown dust from the Sahara. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during the summer and spring months. Monitoring wind direction is crucial; winds from the south often carry Saharan dust. Fog, common in the cooler months, can also trap pollutants, reducing visibility and impacting respiratory health.