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Ankililoaka, nestled within the Toliara region of Madagascar, occupies a geographically significant position along the southwestern coast. Situated at approximately -22.7674° latitude and 43.6159° longitude, the city benefits from a coastal location bordering the Mozambique Channel. The surrounding landscape is characterized by a blend of sandy beaches, coastal scrubland, and the gradual transition to drier, more inland savannah ecosystems. Elevation is relatively low, rarely exceeding 30 meters above sea level, contributing to a generally flat terrain. This low elevation, combined with the proximity to the channel, influences local wind patterns and humidity levels. The urban character of Ankililoaka is that of a small, developing coastal town, primarily reliant on fishing and small-scale agriculture. While there are no major industrial belts directly adjacent to the city, agricultural zones cultivating vanilla, cloves, and rice extend inland, potentially contributing to localized emissions from burning and fertilizer use. The urban–rural gradient is relatively sharp; the town quickly gives way to rural agricultural lands and sparsely populated villages. The prevailing trade winds, typical of this region, generally blow from the southeast, impacting the dispersal of any pollutants generated within the town or carried from nearby agricultural practices. The coastal location also means the city is susceptible to sea breezes, which can influence local air circulation and potentially trap pollutants under certain meteorological conditions. The surrounding landscape’s vegetation cover, though limited, plays a role in absorbing some pollutants, but its capacity is constrained by the arid climate.

Ankililoaka experiences a tropical climate with distinct wet and dry seasons, significantly impacting air quality dynamics. The wet season, typically spanning from November to April, brings increased rainfall and higher humidity. While rainfall naturally helps to cleanse the atmosphere by removing particulate matter, the associated increased humidity can exacerbate respiratory issues for sensitive individuals. The dry season, from May to October, is characterized by lower rainfall, higher temperatures, and often, calmer wind conditions. This can lead to a build-up of pollutants, particularly during periods of agricultural burning, a common practice for land clearing and crop residue disposal. The lack of strong winds during these months can trap pollutants closer to ground level. Fog, though infrequent, can also occur, particularly during the transition months (April/May and October/November), further reducing air dispersion and potentially increasing localized pollution concentrations. The months of July and August often see the most stable atmospheric conditions, which, while pleasant for temperature, can lead to stagnant air and a greater potential for pollutant accumulation. Individuals with pre-existing respiratory conditions, such as asthma, and young children should exercise caution during these periods, limiting strenuous outdoor activity and monitoring for any adverse symptoms. The prevalence of wood-burning stoves for cooking in some households also contributes to indoor and outdoor air pollution, particularly during the dry season. Overall, while Ankililoaka’s coastal location offers some natural air cleansing, seasonal variations and local practices significantly influence air quality.