Sidi Merouane Air Quality Index (AQI)

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Sidi Merouane, nestled within the Chlef province of Algeria, occupies a geographically significant position in the country’s north-central region. Located at coordinates 36.5333° N, 1.3333° E, the city sits on the Tell Atlas mountain range foothills, transitioning from the coastal plains towards the higher elevations of the interior. This terrain influences air quality by creating localized wind patterns and potential for temperature inversions, trapping pollutants in the valleys. The surrounding landscape is characterised by fertile agricultural lands, primarily dedicated to cereal crops and olive groves, alongside some smaller-scale industrial activity concentrated around Chlef city, approximately 30km to the east. Sidi Merouane’s elevation, around 150m above sea level, moderates temperatures but doesn’t fully negate the effects of continental air masses. The Mediterranean Sea is roughly 50km north, providing some maritime influence but not enough to consistently disperse pollutants. The urban-rural gradient is relatively sharp; the city itself is compact, with a population of around 20,018, quickly giving way to agricultural fields. Dust from agricultural practices and potential emissions from nearby industrial zones contribute to the local air quality profile, exacerbated by the region’s semi-arid climate and occasional strong winds.

Air quality in Sidi Merouane experiences distinct seasonal variations. Spring (March-May) often sees a moderate increase in particulate matter due to agricultural burning and dust stirred up by winds transitioning from winter storms. Summer (June-August) is typically the clearest period, with prevailing winds from the Mediterranean offering some dispersion, though high temperatures can promote ozone formation. However, prolonged dry spells increase the risk of dust storms originating from the Sahara, impacting visibility and respiratory health. Autumn (September-November) marks a return to increased pollution as agricultural activities resume and temperature inversions become more frequent, trapping pollutants near the ground. This is often the most challenging period for those with respiratory sensitivities. Winter (December-February) brings cooler temperatures and increased humidity, potentially leading to fog formation which can exacerbate particulate matter concentrations. Months to avoid strenuous outdoor activity are October and November, while June and July generally offer the best air quality. Sensitive groups – children, the elderly, and those with pre-existing respiratory conditions – should limit exposure during autumn and winter, and monitor local conditions during Saharan dust events.