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Belemoka, nestled within the Fianarantsoa Province of Madagascar, occupies a geographically significant position in the island’s central highlands. Located at approximately -21.7823° latitude and 47.6060° longitude, the town sits at an elevation that contributes to its relatively cool climate compared to coastal regions. The surrounding landscape is dominated by rolling hills and terraced rice paddies, characteristic of the Betsileo region, a major agricultural zone. This proximity to intensive agricultural practices, particularly rice cultivation and the use of fertilizers, can contribute to localized ammonia emissions and particulate matter from soil erosion, especially during the rainy season. The urban character of Belemoka is distinctly rural, with a small population of around 13,000, reflecting a predominantly agrarian economy. The urban–rural gradient is gradual, blending seamlessly into the surrounding agricultural lands. While Belemoka itself lacks significant industrial belts, it serves as a regional market town, with some small-scale processing of agricultural products, potentially generating localized emissions. The town’s location within a valley can also influence air circulation patterns, potentially trapping pollutants under certain meteorological conditions. The nearest substantial body of water is the Onilahy River, which flows nearby, and while it doesn't directly impact air quality, its presence influences local humidity and temperature, which in turn can affect pollutant dispersion. The terrain’s undulating nature and the prevalence of agricultural land are key factors shaping Belemoka’s air quality profile.

Belemoka’s air quality is intrinsically linked to its tropical highland climate, exhibiting a distinct wet and dry season pattern. The wet season, typically spanning from November to April, brings frequent rainfall and high humidity. While the rain itself can help cleanse the atmosphere by scavenging particulate matter, the increased agricultural activity during this period, including fertilizer application and soil disturbance, leads to elevated levels of ammonia and dust. Fog, common during the cooler mornings of the wet season, can trap pollutants near the ground, exacerbating localized air quality issues. The dry season, from May to October, is characterized by lower rainfall and increased sunshine. Temperature inversions, where cooler air is trapped beneath a layer of warmer air, are more likely to occur during this period, particularly in the mornings, hindering vertical mixing and leading to pollutant accumulation. Wind patterns are generally light and variable throughout the year, but during the dry season, periods of calm can prolong the impact of inversions. Sensitive groups, such as children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season mornings, particularly in areas near agricultural fields. Outdoor activities are generally more favorable during the afternoons of the dry season and throughout the wet season, when rainfall and wind help disperse pollutants. The increased burning of agricultural waste after harvest, typically in October and November, can also temporarily degrade air quality. Overall, understanding these seasonal variations is crucial for managing potential air quality impacts and protecting public health.