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Malloussa, nestled within the Tanger-Tétouan-Al Hoceïma region of Morocco, occupies a geographically significant position at approximately 35.73°N, 5.63°W. The city’s location, just inland from the Atlantic coast, profoundly influences its environmental conditions, particularly air quality. Situated at an elevation of roughly 300 meters above sea level, Malloussa benefits from a relatively mild coastal climate, though it’s far enough from the immediate shoreline to avoid the most persistent maritime breezes. The surrounding landscape is characterized by a blend of rolling hills and fertile plains, indicative of the region’s agricultural activity. To the west, the Atlantic Ocean exerts a moderating influence, while eastward, the terrain gradually rises towards the Rif Mountains, a significant factor in regional weather patterns. This proximity to agricultural zones, particularly olive groves and cereal farms, introduces potential sources of particulate matter from agricultural practices, including tilling and fertilizer application. While not directly adjacent to major industrial belts, Malloussa’s position within the broader Tanger-Tetouan economic corridor means it can be affected by transboundary pollution drift from industrial areas further north and east. The urban–rural gradient around Malloussa is relatively gradual, with smaller villages and agricultural land seamlessly blending into the town’s periphery, contributing to a dispersed population density and a complex interplay between urban and rural pollution sources. The prevailing winds, often originating from the Atlantic, can carry pollutants inland, while the Rif Mountains can occasionally trap air masses, leading to localized air quality challenges.

Malloussa’s air quality exhibits a distinct seasonal pattern dictated by its Mediterranean climate. The dry summer months (June-August) typically see the poorest air quality. High temperatures and minimal rainfall create stable atmospheric conditions, frequently leading to temperature inversions where a layer of warm air traps cooler air near the ground, preventing pollutants from dispersing. This stagnation is exacerbated by reduced wind speeds, allowing particulate matter and other pollutants to accumulate. Dust storms, originating from the Sahara Desert, can also impact air quality during these months, significantly increasing particulate concentrations. Conversely, the wetter months (October-March) generally offer improved air quality. Increased rainfall effectively ‘washes’ pollutants from the atmosphere, and stronger, more frequent winds facilitate dispersion. Winter months, while cooler, can experience periods of fog, which, while visually striking, can trap pollutants close to the ground, creating localized air quality concerns. Spring (April-May) and Autumn (September) represent transitional periods with moderate air quality, influenced by shifting wind patterns and temperature fluctuations. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the summer months, limiting outdoor activities during peak heat and dust storm events. Maintaining indoor air quality through proper ventilation and air filtration is also advisable. During periods of fog in winter, short-term exposure should be minimized, and awareness of local air quality conditions is crucial for informed decision-making regarding outdoor pursuits.