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El Hadjar, nestled within the Annaba Province of Algeria, presents a unique geographic context influencing its air quality. Situated at coordinates 36.8000, 7.7333, the city occupies a position on the coastal plains, gently rising towards the Tell Atlas mountains to the south. This proximity to the Mediterranean Sea moderates temperatures but also introduces moisture, potentially contributing to secondary pollutant formation. The surrounding landscape is a mix of agricultural land – primarily olive groves and vineyards – and increasingly, industrial zones associated with Annaba’s port and petrochemical complexes. El Hadjar itself, with a population of approximately 26,060, functions as a satellite city to Annaba, experiencing a degree of urban-rural gradient as one moves inland. The terrain is generally flat near the coast, becoming more undulating with elevation. The prevailing winds are typically from the north and northeast, carrying maritime influences but also potentially channeling pollutants from the larger Annaba industrial area. This geographic configuration means El Hadjar is susceptible to both locally generated emissions and the transport of pollutants from regional sources, impacting air quality, particularly during periods of atmospheric stability. The city’s relatively low elevation further limits atmospheric dispersion.

El Hadjar experiences a Mediterranean climate, with distinct wet and dry seasons heavily influencing air quality. Winter (December-February) often brings increased particulate matter due to residential heating using wood and coal, coupled with temperature inversions trapping pollutants near the ground. Rainfall, while present, isn’t always sufficient to fully cleanse the air. Spring (March-May) sees improving conditions as temperatures rise and winds become more frequent, dispersing pollutants. However, agricultural burning can temporarily elevate particulate levels. Summer (June-August) is typically the clearest period, with strong sea breezes and high temperatures promoting atmospheric mixing. However, ozone formation can be a concern due to intense sunlight and precursor emissions from Annaba’s industry. Autumn (September-November) marks a transition, with decreasing temperatures and calmer winds leading to a gradual build-up of pollutants. Sensitive individuals – children, the elderly, and those with respiratory conditions – should be particularly cautious during winter and autumn. Avoiding strenuous outdoor activity during peak pollution periods, and monitoring local conditions, is advisable. The dry season generally presents better air quality for outdoor activities, but ozone levels should be considered.