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Bab Ezzouar, a vibrant city within the Algiers province of Algeria, occupies a strategic position on the Mitidja Plain, a fertile coastal area. Located approximately 15km east of Algiers city centre, its coordinates (36.7217, 3.1853) place it close to the Mediterranean Sea, roughly 5km inland. The terrain is relatively flat, typical of the plain, rising gently towards the Atlas Mountains to the south. This proximity to the sea introduces a moderating influence on the climate, but also allows for the potential influx of maritime air masses carrying pollutants. Bab Ezzouar is experiencing rapid urbanisation, transitioning from a largely agricultural area to a densely populated residential and commercial hub. Surrounding the city are agricultural lands, particularly citrus groves and vineyards, alongside expanding industrial zones concentrated towards the west, near the Algiers port area. This industrial activity, coupled with increasing vehicular traffic associated with urban sprawl, contributes significantly to localised air pollution. The urban-rural gradient is becoming increasingly blurred, with peri-urban development encroaching on previously agricultural land. The prevailing winds, generally from the northwest, can transport pollutants from Algiers and the industrial zones directly over Bab Ezzouar, exacerbating air quality concerns. The flat topography limits natural dispersion of pollutants, creating pockets of higher concentration.

Bab Ezzouar’s air quality follows a distinct seasonal pattern, largely dictated by meteorological conditions. Summer (June-August) often sees a slight improvement due to consistent sea breezes that help disperse pollutants, though high temperatures can promote ozone formation. However, this is also a period of increased energy demand, potentially raising emissions from power generation. Autumn (September-November) brings a deterioration in air quality as temperatures drop and temperature inversions become more frequent, trapping pollutants near the ground. This is compounded by the start of the heating season, increasing reliance on fossil fuels. Winter (December-February) is typically the worst period for air quality, characterised by stagnant air masses, low wind speeds, and frequent temperature inversions. Rainfall is relatively low during this time, offering limited natural cleansing. Spring (March-May) sees a gradual improvement as temperatures rise and winds become more frequent, dispersing pollutants. However, dust storms originating from the Sahara Desert can significantly impact air quality during this period. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during winter and periods of Saharan dust intrusion. Monitoring wind direction is crucial; winds from the west bring pollutants from Algiers’ industrial areas.