Es Sebt, nestled within the Skikda province of Algeria, occupies a strategically important coastal position along the Mediterranean Sea. Located at approximately 36.6624° N, 7.0774° E, the town’s geography is characterized by a gently sloping terrain rising from the shoreline towards the foothills of the Tell Atlas Mountains. This proximity to the mountains creates a localized rain shadow effect, influencing precipitation patterns and contributing to drier conditions compared to areas further inland. The surrounding landscape is a blend of coastal plains, agricultural land, and the rugged, increasingly arid terrain of the Atlas foothills. Es Sebt’s position within the wider Skikda region places it within a historically significant industrial belt, with nearby zones dedicated to phosphate processing and petrochemical industries, a factor that can influence regional air quality. The urban–rural gradient transitions relatively quickly, with agricultural fields and small villages dominating the immediate periphery. The Mediterranean Sea itself plays a crucial role; sea breezes can provide some ventilation, dispersing pollutants, but also introduce marine aerosols. Elevation is relatively low, averaging around 20 meters above sea level, minimizing the potential for significant altitude-related air quality variations. The town’s coastal location and proximity to industrial activity combine to create a complex interplay of factors impacting local air quality, making it susceptible to both localized and regional pollution sources. The prevailing northerly winds, common along this stretch of the Algerian coast, can either dilute or concentrate pollutants depending on their origin and atmospheric stability.

Es Sebt’s air quality experiences a distinct seasonal cycle dictated by the interplay of temperature, wind patterns, and regional weather systems. The warm, dry summers (June-August) often see a stagnation of air due to high-pressure systems, leading to temperature inversions where cooler air becomes trapped beneath a layer of warmer air aloft. This inversion prevents vertical mixing, trapping pollutants released from industrial activities and vehicle emissions near the ground. Dust storms, originating from the Sahara, can also significantly degrade air quality during these months, carrying fine particulate matter over long distances. Autumn (September-November) brings a gradual shift, with increased wind speeds and more frequent rainfall, which helps to cleanse the atmosphere. Winter (December-February) is generally the most favourable period for air quality, with consistent northerly winds dispersing pollutants and regular rainfall washing them out. However, periods of calm weather and fog can still lead to localized pollution build-up. Spring (March-May) is a transitional period, with variable wind patterns and occasional dust events. Sensitive groups, such as children, the elderly, and individuals with respiratory conditions, should exercise caution during the summer months, limiting outdoor activity during peak pollution hours. Increased hydration and the use of air purifiers indoors can also provide some relief. The agricultural practices in the surrounding areas, particularly the use of fertilizers, can contribute to ammonia emissions, which are more noticeable during the wetter months. Overall, careful monitoring and public health advisories are crucial throughout the year to mitigate the impacts of fluctuating air quality.