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Gueznaia, nestled within the Tanger-Tétouan-Al Hoceïma region of Morocco, presents a fascinating case study in urban geography and air quality. Situated at coordinates 35.7066, -5.9088, the city occupies a position in the foothills of the Rif Mountains, approximately 20 kilometers inland from the Atlantic coastline. This proximity to the ocean exerts a moderating influence on the climate, but also introduces the potential for salt spray and marine aerosols impacting local air composition. The terrain is characterised by rolling hills and valleys, influencing wind patterns and creating localised pockets where pollutants can accumulate. Gueznaia’s urban character is evolving, transitioning from a primarily agricultural community to a more diversified economy. Surrounding the city are significant agricultural zones, particularly olive groves and citrus farms, which contribute to seasonal biomass burning for agricultural waste disposal. Further afield, the industrial activity concentrated around Tangier, a major port city, can contribute to regional background pollution levels. The urban-rural gradient is relatively sharp, with agricultural land immediately bordering the city limits. This interplay of geographical features and human activity creates a complex environment for air quality management in Gueznaia, demanding a nuanced understanding of local emission sources and meteorological conditions.

Air quality in Gueznaia follows a distinct seasonal pattern, largely dictated by meteorological conditions and agricultural practices. Spring (March-May) sees a gradual improvement in air quality as rainfall increases, washing away accumulated pollutants. However, this period also coincides with agricultural burning, potentially leading to spikes in particulate matter. Summer (June-August) is typically characterised by stable atmospheric conditions and high temperatures, which can exacerbate ozone formation, particularly downwind of urban areas. The dry, hot winds from the Sahara, known as Sirocco, can transport dust and sand, significantly degrading air quality. Autumn (September-November) often experiences a return of agricultural burning as farmers prepare fields for winter planting, again increasing particulate pollution. This is also a period of increased temperature inversions, trapping pollutants near the ground. Winter (December-February) generally offers the cleanest air, with increased precipitation and stronger winds dispersing pollutants. However, domestic heating using wood and charcoal can contribute to localised pollution hotspots. Sensitive groups – children, the elderly, and those with respiratory conditions – should be particularly cautious during the summer and autumn months, limiting strenuous outdoor activity on days with poor visibility. Monitoring wind direction and avoiding areas near agricultural burning are advisable.