Ben Daoud Air Quality Index (AQI)

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Ben Daoud, nestled within the Relizane province of Algeria, occupies a geographically significant position in the Mitidja plain, a fertile coastal region west of Algiers. Located at approximately 35.7192° N, 0.5203° E, the city’s elevation is relatively low, averaging around 20 meters above sea level, contributing to a generally stable atmospheric layer. The surrounding landscape is characterized by undulating hills and agricultural fields, primarily dedicated to cereal cultivation and olive groves, typical of the Mitidja’s productive farmland. The proximity to the Mediterranean Sea, roughly 15 kilometers to the north, introduces a maritime influence, moderating temperatures and occasionally bringing in sea breezes. However, this proximity also means the city is susceptible to coastal fog, particularly during cooler months, which can trap pollutants. The urban–rural gradient transitions quickly; Ben Daoud is surrounded by agricultural land, limiting extensive industrial sprawl. While not directly adjacent to major industrial belts, the broader Relizane province does contain some light industrial activity, and the city’s connection to the national road network facilitates the transport of goods and potentially contributes to localized traffic-related pollution. The Mitidja plain's topography, with its gentle slopes, can sometimes impede the dispersion of pollutants, especially during periods of calm winds. The region's climate, classified as semi-arid, influences evaporation rates and the potential for dust storms, further impacting air quality.

Ben Daoud’s air quality experiences a distinct seasonal cycle dictated by its Mediterranean climate. Spring (March-May) typically sees a gradual improvement in air quality as temperatures rise and winds become more frequent, dispersing accumulated winter pollutants. However, spring also brings increased agricultural activity, potentially leading to elevated levels of particulate matter from tilling and fertilizer application. Summer (June-August) is generally the cleanest period, characterized by hot, dry conditions and often strong, consistent sea breezes that effectively ventilate the area. These breezes help to flush out pollutants, though intense heat can exacerbate ozone formation under certain conditions. Autumn (September-November) marks a transition period, with decreasing temperatures and a weakening of the sea breeze. This often leads to a gradual decline in air quality as pollutants become trapped, particularly during periods of calm weather. Winter (December-February) is typically the most challenging season. Cooler temperatures and frequent temperature inversions – where a layer of warm air sits above cooler air – trap pollutants near the ground. Fog, common during these months, further exacerbates this issue. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should limit prolonged outdoor activity during winter mornings and days with persistent fog. Increased agricultural burning, a traditional practice in the region, can also contribute to elevated particulate matter levels during this time. The dry season, encompassing much of summer, is generally favorable for outdoor activities, while spring and autumn require greater vigilance regarding air quality conditions.