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Beketro, nestled within the Toliara region of Madagascar, occupies a unique coastal position significantly influencing its air quality. Located at approximately -24.5503° latitude and 45.2991° longitude, the city sits on a relatively flat coastal plain, just inland from the Mozambique Channel. This proximity to the Indian Ocean introduces a constant maritime influence, generally moderating temperatures and providing a degree of natural ventilation. The surrounding landscape is characterized by a mosaic of spiny forest, typical of southwestern Madagascar, interspersed with pockets of agricultural land primarily dedicated to vanilla, cloves, and rice cultivation. The urban–rural gradient is relatively sharp; Bekitro transitions quickly from a small settlement to the extensive, arid scrubland and forest. Elevation is minimal, rarely exceeding 30 meters above sea level, which limits the potential for topographic shielding from pollutants. While Bekitro itself lacks significant heavy industry, it serves as a regional hub for agricultural processing and small-scale fishing, activities that can contribute to localized air pollution. The prevailing winds, generally easterly, often carry dust and particulate matter from the interior, particularly during the drier months. The lack of substantial urban sprawl and the relatively small population (approximately 16,000) currently mitigate severe air quality issues, but future growth and agricultural intensification pose potential challenges. The coastal location also means the city is susceptible to sea spray and salt deposition, which can impact respiratory health.

Beketro’s tropical climate dictates a distinct wet and dry season cycle, profoundly impacting its air quality. The dry season, typically spanning from May to October, is characterized by consistently high temperatures and reduced rainfall. This period often sees a noticeable increase in particulate matter, largely due to windblown dust from the surrounding spiny forest and agricultural fields. The lack of rainfall means there's less atmospheric cleansing, allowing these particles to accumulate. Temperature inversions, though less frequent than in colder climates, can occasionally occur, trapping pollutants closer to the ground, especially during calmer nights. The wet season, from November to April, brings frequent rainfall and higher humidity, effectively washing away much of the accumulated particulate matter and significantly improving air quality. However, heavy rainfall can also lead to increased fungal spores and mold, potentially triggering respiratory issues in sensitive individuals. Fog, though infrequent, can occur during the transition months, trapping moisture and pollutants, creating localized pockets of poor air quality. During the dry season, outdoor activities are best undertaken in the early morning or late afternoon when temperatures are slightly cooler and wind speeds are higher. Individuals with respiratory conditions, such as asthma, should exercise caution and consider wearing masks during prolonged outdoor exposure. The wet season generally offers a more breathable environment, but those with allergies should remain vigilant regarding potential fungal triggers. Overall, Bekitro experiences a relatively benign air quality profile, with the dry season presenting the most significant, albeit manageable, challenges.