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Ammi Moussa, nestled within the Relizane Province of Algeria, occupies a geographically significant position in the country’s northwest. Located at approximately 35.8667°N latitude and 1.1167°E longitude, the city sits on the High Plateaus, a region characterised by a relatively flat, elevated terrain. This plateau landscape, a continuation of the Tell Atlas mountain range, influences local wind patterns and contributes to a continental climate. The surrounding landscape is predominantly agricultural, with extensive cultivation of cereals and vineyards, typical of the region’s fertile soils. While not immediately adjacent to the Mediterranean Sea, Ammi Moussa is within reasonable proximity, approximately 70km inland, meaning maritime influences are minimal but can contribute to humidity levels. The urban-rural gradient is fairly sharp; the city itself is a relatively compact settlement, quickly giving way to agricultural fields. Industrial activity is limited within Ammi Moussa itself, but the broader Relizane province contains some small-scale industrial zones focused on food processing and building materials. This combination of agricultural practices, limited industry, and plateau topography creates a unique set of conditions impacting air quality. Dust from agricultural activities, combined with potential emissions from local transport and small industries, are key considerations. The elevation, around 160m, can also contribute to temperature inversions, trapping pollutants near the ground.

Ammi Moussa experiences a Mediterranean-influenced semi-arid climate, resulting in distinct seasonal air quality patterns. Spring (March-May) sees a gradual improvement in air quality as rainfall increases, washing away accumulated dust from the dry winter months. However, agricultural burning for land preparation can temporarily elevate particulate matter. Summer (June-August) is typically the driest period, with hot, stable air masses leading to increased concentrations of ozone and dust, particularly during periods of strong winds originating from the Sahara. August is often the most challenging month for respiratory health. Autumn (September-November) brings a transition period, with decreasing temperatures and increasing rainfall, generally improving air quality. However, the first rains can stir up settled dust. Winter (December-February) is relatively cool and wet, offering the best air quality of the year due to rainfall scavenging pollutants and reduced agricultural activity. However, temperature inversions are common during calm winter nights, trapping pollutants at ground level. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during hot, dry summer days and calm winter evenings. Monitoring wind direction is crucial, as winds from the Sahara can significantly worsen air quality.