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El Kseur, nestled within the Bejaïa province of Algeria, occupies a unique geographic position in the Kabylie region. Situated at coordinates 36.6844, 4.8522, the city is characterized by a mountainous terrain, a direct consequence of its location within the Tell Atlas mountain range. The landscape immediately surrounding El Kseur is dominated by steep slopes and verdant valleys, heavily influenced by the Mediterranean climate. Its elevation, approximately 300 meters above sea level, contributes to localized weather patterns. The proximity to the Mediterranean Sea, roughly 20 kilometers to the north, introduces maritime influences, moderating temperatures and increasing humidity. While not directly adjacent to major industrial belts, the region supports significant agricultural activity, primarily olive groves and orchards, which can contribute to seasonal particulate matter from agricultural practices like burning. The urban-rural gradient is quite sharp; El Kseur itself is a relatively compact urban center, quickly transitioning to rural agricultural land and forested hillsides. This topography can trap pollutants during periods of calm weather, impacting local air quality, particularly in the lower-lying areas of the city. The prevailing winds, generally from the northwest, play a crucial role in dispersing or concentrating these pollutants.

El Kseur experiences a Mediterranean climate, dictating a distinct seasonal air quality narrative. Summers (June-August) often see relatively good air quality, driven by consistent sea breezes that help disperse pollutants, though ozone levels can rise with intense sunlight. However, agricultural burning during the harvest season can cause temporary spikes in particulate matter. Autumn (September-November) brings increased rainfall, effectively washing away many pollutants, leading to improved conditions. This is generally the most favourable period for outdoor activity. Winter (December-February) is characterized by cooler temperatures and potential temperature inversions, trapping pollutants in the valleys and lower parts of the city, particularly from residential heating using wood or other solid fuels. Fog can also exacerbate these conditions. Spring (March-May) sees a transition period, with fluctuating weather patterns. The drying vegetation and increased agricultural activity can lead to a rise in particulate matter, especially during dry, windy spells. Sensitive groups – children, the elderly, and those with respiratory conditions – should be particularly cautious during winter and spring months. Monitoring wind direction is key; winds from the south can bring dust from the Sahara, impacting air quality.