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Oued el Abtal, nestled within the Mascara province of Algeria, occupies a geographically significant position in the country’s northwest. Located at coordinates 35.4500, 0.6833, the city is situated in a region characterized by rolling hills and fertile plains, part of the Tell Atlas mountain range foothills. The terrain is undulating, influencing local wind patterns and creating microclimates. The surrounding landscape is predominantly agricultural, with olive groves, vineyards, and cereal crops dominating the rural areas immediately adjacent to the urban centre. This agricultural activity, while vital to the local economy, contributes to seasonal particulate matter from field preparation and harvesting. Oued el Abtal isn’t directly adjacent to a major body of water, though smaller wadis (seasonal riverbeds) traverse the region, occasionally contributing to localised humidity. The urban-rural gradient is relatively sharp, transitioning quickly from denser residential areas to open farmland. While not a major industrial hub, Mascara province does have some localised industrial activity, and prevailing winds can transport pollutants from these sources towards Oued el Abtal. The city’s elevation, approximately 800m above sea level, influences temperature and atmospheric circulation, potentially trapping pollutants during temperature inversions, particularly in the cooler months. This combination of factors creates a unique air quality profile for the city.

Air quality in Oued el Abtal experiences a distinct seasonal rhythm. Spring (March-May) often sees a temporary improvement as rainfall washes away accumulated pollutants, but agricultural burning for land preparation can elevate particulate matter levels. Summer (June-August) is typically drier, with higher temperatures and stable atmospheric conditions. This can lead to the build-up of ozone, exacerbated by sunlight and vehicle emissions. August is often the least favourable month for outdoor activity for those with respiratory sensitivities. Autumn (September-November) brings a return of agricultural activity, with olive harvesting and processing contributing to localised dust and smoke. November often experiences increased humidity and potential for fog, trapping pollutants near the ground. Winter (December-February) is generally the period of poorest air quality. Lower temperatures create temperature inversions, preventing vertical mixing of the atmosphere and concentrating pollutants from domestic heating (wood and charcoal) and vehicle exhaust. Sensitive groups – children, the elderly, and those with pre-existing respiratory conditions – should limit outdoor exposure during these colder months. Wind patterns, predominantly from the west, play a crucial role in dispersing or concentrating pollutants throughout the year. Monitoring wind direction is key to understanding pollution events.