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Aïn Cheggag, nestled within the Fès-Meknès region of Morocco, occupies a geographically significant position in the foothills of the Middle Atlas Mountains. Located at approximately 33.8833°N, -5.0333°W, the city’s terrain is characterised by undulating hills and valleys, a landscape sculpted by both erosion and seasonal watercourses. The elevation, while not extreme, contributes to localised temperature inversions, a key factor influencing air quality. Aïn Cheggag isn’t directly adjacent to a major body of water, though it benefits from groundwater resources and is within reach of the Sebou River basin. The surrounding area is a mosaic of agricultural land – primarily olive groves and cereal crops – and semi-arid scrubland. This agricultural activity, while vital to the local economy, introduces potential sources of particulate matter from dust and agricultural burning. The urban-rural gradient is relatively sharp; the city itself is compact, with a noticeable transition to rural landscapes within a few kilometres. The proximity to Fès, a major industrial and commercial hub, means Aïn Cheggag is also susceptible to regional pollution transport, particularly during periods of stagnant air. The prevailing winds, often from the west, can carry pollutants from the coastal plains inland, impacting local air quality. Understanding this interplay of topography, land use, and regional influences is crucial for assessing and mitigating pollution in Aïn Cheggag.

Air quality in Aïn Cheggag follows a distinct seasonal pattern, largely dictated by meteorological conditions and agricultural practices. The summer months (June-August) often see a rise in particulate matter due to dry conditions and increased dust suspension from agricultural activities and unpaved roads. High temperatures can exacerbate ozone formation, though this is less pronounced than in larger urban centres. Autumn (September-November) brings a temporary improvement as rainfall begins to suppress dust, but also coincides with the burning of agricultural residue, leading to localised spikes in PM2.5. Winter (December-February) is typically the period of poorest air quality. Temperature inversions are common, trapping pollutants close to the ground, and wood burning for heating becomes prevalent, contributing significantly to particulate pollution. Fog can also exacerbate the issue, reducing dispersion. Spring (March-May) offers a gradual improvement as temperatures rise and rainfall increases, cleansing the atmosphere. Sensitive groups – children, the elderly, and those with respiratory conditions – should be particularly cautious during winter and periods of agricultural burning. Avoiding strenuous outdoor activity on still, cold days and during harvest seasons is advisable. Monitoring local conditions and heeding health advisories is crucial for protecting respiratory health throughout the year.