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Ebn Ziad, nestled within the Constantine Province of Algeria, occupies a unique geographical position in the northeast of the country. Situated at coordinates 36.3833° N, 6.4667° E, the city is characterized by a plateau landscape, a feature common to this region of the Aurès Mountains. The terrain is undulating, marked by deep ravines and valleys carved by seasonal watercourses. This topography significantly influences air quality, creating localized pockets where pollutants can accumulate due to limited air circulation. Ebn Ziad’s elevation, approximately 600-700 meters above sea level, contributes to cooler temperatures and increased precipitation compared to lower-lying areas. The surrounding landscape is a mix of semi-arid steppe and agricultural land, with olive groves and cereal crops dominating the rural areas. While not directly on the coast, the Mediterranean Sea’s influence moderates the climate. The urban-rural gradient is relatively sharp, with a noticeable increase in dust and particulate matter as one moves closer to agricultural activities and unpaved roads. The city itself is compact, with a growing population of 15,514, and limited heavy industry within the immediate urban core, though regional industrial activity impacts the broader air shed. The ravine systems, while scenic, can trap pollutants during calm weather conditions.

Air quality in Ebn Ziad experiences a distinct seasonal rhythm. Spring (March-May) brings a temporary improvement as increased rainfall washes away accumulated dust from the dry winter months. However, agricultural burning for land preparation can cause localized spikes in particulate matter. Summer (June-August) is typically the driest period, with hot, stable air masses leading to increased concentrations of ozone and ground-level pollutants from vehicle emissions. The high temperatures exacerbate these issues. Autumn (September-November) sees a return of dust storms, originating from the Sahara Desert, carried by prevailing winds. This is often the period of poorest air quality. Winter (December-February) is characterized by cooler temperatures and occasional fog, which can trap pollutants near the ground, leading to reduced visibility and respiratory irritation. Temperature inversions are common during winter mornings, further concentrating pollutants. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during autumn and winter months. Spring offers the most favourable conditions, but awareness of agricultural burning is crucial. Monitoring wind patterns is key; periods of calm wind are associated with poorer air quality, regardless of season.