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Biougra, nestled within the Souss-Massa region of Morocco, occupies a unique geographic position that significantly influences its air quality. Located at approximately 30.2144° N, -9.3708° W, the city sits on a relatively flat coastal plain, just inland from the Atlantic Ocean. This proximity to the sea introduces a moderating effect on temperatures, but also exposes the city to potential salt spray and marine aerosols. The surrounding landscape is characterized by a gradual transition from fertile agricultural lands, particularly date palm groves and argan tree plantations, to the foothills of the Anti-Atlas Mountains to the east. This agricultural intensity contributes to potential sources of particulate matter, especially during harvest seasons when agricultural burning may occur. The urban–rural gradient is relatively sharp; Biougra is a small town, and the immediate surrounding area is predominantly rural, minimizing the impact of large-scale industrial zones. However, the broader Souss-Massa region does contain some industrial activity, primarily related to food processing and phosphate mining further inland, which can occasionally influence air quality through long-range transport. The elevation of Biougra is low, generally below 50 meters above sea level, which can exacerbate temperature inversions, trapping pollutants close to the ground. The prevailing winds are generally westerly, bringing in maritime air, but local topography can disrupt these patterns, creating pockets of stagnant air, particularly during periods of calm weather. The argan forests, while ecologically valuable, also contribute to biogenic volatile organic compounds (BVOCs), which can react with other pollutants to form ozone under specific conditions.

Biougra’s air quality experiences a distinct seasonal pattern dictated by its Mediterranean climate, characterized by warm, dry summers and mild, wetter winters. The summer months (June-August) typically see the lowest rainfall and highest temperatures, often accompanied by periods of atmospheric stability. This can lead to temperature inversions, where a layer of warm air traps cooler air and pollutants near the ground, resulting in a noticeable increase in particulate matter and potentially other pollutants. The dry, hot conditions also encourage dust lifting from agricultural fields, further degrading air quality. Spring (March-May) and Autumn (September-November) generally offer the most favourable conditions, with moderate temperatures, increased wind speeds, and occasional rainfall, which helps to disperse pollutants. Winter (December-February) brings cooler temperatures and increased precipitation, which can temporarily improve air quality by washing pollutants from the atmosphere. However, periods of fog, particularly in December and January, can trap pollutants and reduce visibility. Sensitive groups, such as children, the elderly, and individuals with respiratory conditions, should be particularly cautious during the summer months, limiting strenuous outdoor activity during peak heat and potential pollution episodes. Agricultural burning, if practiced, is most likely to occur during the autumn harvest season, so awareness of local agricultural practices is important. While the coastal location provides some buffering, prolonged periods of calm weather in any season can lead to localized air quality deterioration.