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Takelsa, nestled in the Nabeul Governorate of Tunisia, occupies a geographically significant position along the country’s northeastern coast. Located at approximately 36.78°N, 10.63°E, the city benefits from a Mediterranean climate and a landscape shaped by both coastal influences and proximity to the fertile Sahel plain. The terrain is gently undulating, transitioning from sandy coastal stretches to slightly elevated ground inland, rarely exceeding 50 meters above sea level. This low elevation, combined with its coastal location, creates a unique microclimate susceptible to sea breezes and temperature inversions, factors that significantly impact air quality. Takelsa’s urban character is primarily residential, with a developing commercial sector and limited industrial activity concentrated in nearby Nabeul. The surrounding landscape is dominated by olive groves, citrus orchards, and date palm plantations, characteristic of the region’s agricultural intensity. The urban–rural gradient is relatively smooth, with agricultural land gradually merging into the city’s periphery. To the west, the Boughrara plain extends, while eastward, the hills of Sahel rise gently. The proximity to the Mediterranean Sea introduces a marine influence, contributing to humidity and occasional salt spray. While large-scale industrial zones are absent directly within Takelsa, the broader Nabeul region hosts some ceramic production and light manufacturing, potentially contributing to localized air pollution episodes, particularly during periods of stagnant air. The prevailing winds generally blow from the northwest, but their effectiveness in dispersing pollutants can be hampered by atmospheric stability.

Takelsa’s air quality experiences a distinct seasonal cycle dictated by its Mediterranean climate. Summers (June-August) are characterized by intense heat and prolonged periods of atmospheric stability, frequently leading to temperature inversions. These inversions trap pollutants near the ground, resulting in a noticeable increase in particulate matter and potentially other gaseous pollutants. The lack of significant rainfall during these months exacerbates the situation, as there’s minimal natural cleansing of the atmosphere. Spring (March-May) and Autumn (September-November) generally offer improved air quality, with more frequent wind events that help disperse pollutants. However, agricultural burning practices, common during these transition periods, can contribute to localized spikes in smoke and particulate matter. Winter (December-February) brings cooler temperatures and occasional rainfall, which helps to clear the air. Fog, however, can form during these months, particularly in the early morning, trapping pollutants and reducing visibility. 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 periods of stagnant air. Spring and autumn require awareness of agricultural burning; checking local air quality reports and avoiding areas with visible smoke is advisable. While winter generally offers better air quality, fog events can pose a temporary risk. Maintaining good ventilation indoors and avoiding strenuous outdoor activity during periods of poor air quality are always recommended.