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Le Bardo, nestled within the Tunis Governorate of Tunisia, occupies a geographically significant position at the foothills of the Djebel Chouigui mountain range, approximately 10 kilometers west of the Tunisian capital. Its coordinates (36.8092, 10.1406) place it within a gently sloping terrain, transitioning from the coastal plain towards the more rugged interior. The city’s elevation, averaging around 200 meters above sea level, contributes to localized microclimates and influences air circulation patterns. Le Bardo benefits from proximity to the Mediterranean Sea, approximately 5 kilometers to the northeast, which moderates temperatures and introduces maritime influences on wind direction. The surrounding landscape is a blend of urban development, agricultural land, and the natural beauty of the Chouigui mountains, characterized by scrub vegetation and rocky outcrops. The urban–rural gradient is relatively sharp; Le Bardo itself is a densely populated municipality, while the immediate periphery gives way to olive groves and small-scale farming. Further afield, the industrial belt of Tunis exerts an indirect influence, with potential for pollutants to be transported by prevailing winds. The city’s location within a basin-like topography, partially shielded by the mountains, can sometimes trap pollutants, particularly during periods of calm weather. Agricultural practices in the surrounding areas, including the use of fertilizers and occasional burning of crop residues, can also contribute to localized air quality concerns. The presence of the Bardo National Museum, a major cultural attraction, also necessitates careful management of vehicle traffic and associated emissions.

Le Bardo’s air quality experiences a distinct seasonal cycle dictated by Tunisia’s Mediterranean climate. Summers (June-August) are characterized by intense heat and minimal rainfall, leading to atmospheric stability and frequent temperature inversions. These inversions trap pollutants close to the ground, particularly those emitted from vehicular traffic and residential heating (though heating is less prevalent in summer). The lack of significant wind during these months exacerbates the problem, resulting in periods of stagnant air and potentially elevated concentrations of particulate matter. Spring (March-May) and Autumn (September-November) generally offer improved air quality due to increased wind speeds and more frequent rainfall, which helps to disperse pollutants. However, agricultural burning, a traditional practice, can occasionally contribute to localized spikes in smoke and particulate matter during these transitional seasons. Winter (December-February) brings cooler temperatures and occasional rainfall, but also increased humidity and fog, which can trap pollutants and reduce visibility. The combination of cooler temperatures and stagnant air can lead to periods of poor air quality. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should limit prolonged outdoor activity during periods of stagnant air, particularly during the hot summer months and foggy winter days. Maintaining indoor air quality through proper ventilation and air filtration is also advisable. Public health advisories are typically issued during periods of heightened concern, encouraging residents to take precautionary measures.