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Galbois, nestled within the Bordj Bou Arréridj province of Algeria, occupies a geographically significant position in the country’s interior. Located at coordinates 36.2000, 4.4900, the city sits amidst the Tell Atlas mountain range, a landscape characterised by rolling hills and valleys. The terrain is predominantly undulating, influencing local wind patterns and contributing to potential pockets of air stagnation. Galbois’s elevation, approximately 1200 meters above sea level, moderates temperatures but can also exacerbate pollution events through temperature inversions. The city isn’t directly adjacent to a major body of water, though smaller wadis and seasonal streams traverse the surrounding area. The regional economy is a blend of agriculture – primarily cereal crops and olive groves – and light industry, concentrated around Bordj Bou Arréridj city itself, approximately 20km distant. This proximity to industrial activity is a key factor in Galbois’s air quality profile. The urban-rural gradient is relatively sharp; Galbois is a smaller settlement surrounded by agricultural land, meaning pollutants from agricultural practices (dust, ammonia) can contribute to local air quality issues. The prevailing winds, generally from the west, can transport pollutants from the more industrialised areas eastward towards Galbois, impacting air quality, particularly during calmer weather conditions.

Galbois experiences a Mediterranean climate with hot, dry summers and mild, wet winters, profoundly influencing its air quality. Summer (June-August) typically sees the highest pollution levels. Intense sunlight and high temperatures promote the formation of ground-level ozone, a key component of smog, exacerbated by vehicle emissions and industrial activity. Dry conditions also mean dust, both locally generated from agricultural land and transported from the Sahara Desert, becomes a significant pollutant. Autumn (September-November) brings a gradual improvement as temperatures cool and rainfall increases, washing away particulate matter. However, stable atmospheric conditions can still trap pollutants. Winter (December-February) is generally the period of best air quality, with increased precipitation and stronger winds dispersing pollutants. However, wood burning for heating in residential areas can lead to localised spikes in particulate matter. Spring (March-May) sees a transition period, with increasing temperatures and agricultural activity contributing to a gradual rise in pollution. Sensitive individuals – children, the elderly, and those with respiratory conditions – should be particularly cautious during the summer months and consider limiting strenuous outdoor activity on hot, still days. Monitoring wind direction and avoiding activity near agricultural fields during dry spells is also advisable.