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Oulad Salmane, nestled within the Rabat-Sale-Kenitra region of Morocco, occupies a geographically significant position on the Atlantic coastal plain. Located approximately 34.3356° N, -6.4604° W, the town’s terrain is predominantly flat, characteristic of the fertile plains stretching inland from the Atlantic Ocean. Its proximity to the coast, roughly 15 kilometers inland, introduces a maritime influence on the local climate and, consequently, air quality. The surrounding landscape is a blend of agricultural land – primarily dedicated to cereal crops and fruit orchards – and gradually transitioning into the rolling hills of the western Moroccan countryside. This agricultural activity, while vital to the regional economy, can contribute to localized air pollution through the use of fertilizers and occasional agricultural burning practices. The urban–rural gradient around Oulad Salmane is relatively gentle; the town itself is a small settlement, and the transition to rural agricultural areas is gradual. There are no major industrial belts immediately adjacent to Oulad Salmane, though the larger industrial zones of the Rabat-Kenitra metropolitan area lie to the north, potentially influencing regional air quality patterns through prevailing winds. The elevation is low, generally below 50 meters above sea level, which can exacerbate temperature inversions during cooler months, trapping pollutants closer to the ground. The Atlantic Ocean itself acts as a moderating influence, but coastal fog and humidity can also impact pollutant dispersion, sometimes leading to stagnant air conditions. The town’s relatively small size limits its own internal pollution sources, but it remains susceptible to external influences.

Oulad Salmane’s air quality experiences a distinct seasonal pattern dictated by Morocco’s Mediterranean climate. The dry season, spanning roughly from April to October, generally sees improved air quality due to increased wind speeds and solar radiation, which aids in pollutant dispersion. However, the summer months (July and August) can experience periods of stagnant air, particularly during heatwaves, when temperature inversions become more frequent. These inversions trap pollutants near the ground, potentially leading to localized increases in particulate matter. The agricultural burning season, often occurring in late spring and early autumn as farmers clear fields, can also contribute to short-term spikes in air pollution. The wet season, from November to March, brings cooler temperatures and increased rainfall, which naturally helps to cleanse the atmosphere. However, periods of prolonged fog, common during the winter months, can significantly reduce visibility and trap pollutants, creating localized air quality challenges. The months of November and December often see the highest incidence of fog. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during periods of stagnant air or fog, limiting outdoor activity and ensuring adequate ventilation indoors. During the summer, staying hydrated and avoiding strenuous activity during peak heat hours is also advisable. While the overall air quality is generally moderate, awareness of these seasonal variations is crucial for protecting public health.