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Kaoma, nestled in the Western Province of Zambia at approximately -14.8000° latitude and 24.8000° longitude, occupies a geographically significant position within the Barotse Plain. This vast, flat floodplain, historically inundated annually by the Zambezi River’s floodwaters, dictates much of the region’s landscape and, consequently, influences air quality dynamics. The town itself sits at a relatively low elevation, contributing to potential temperature inversions, particularly during the cooler months. Surrounding Kaoma is a mosaic of miombo woodland, interspersed with agricultural land primarily dedicated to maize and cassava cultivation – key components of Zambia’s food security. The proximity to these agricultural zones introduces potential sources of particulate matter, especially during planting and harvesting seasons when soil disturbance is high. While Kaoma lacks immediate access to major rivers beyond the floodplains, the seasonal inundation creates a humid microclimate that can trap pollutants. The urban–rural gradient around Kaoma is gradual; the town blends seamlessly into the surrounding agricultural and forested areas, meaning that rural activities directly impact the air quality experienced within the town limits. There are no major industrial belts immediately adjacent to Kaoma, but regional mining operations, though distant, can contribute to long-range transport of pollutants. The flat terrain limits natural ventilation, potentially exacerbating localized pollution events. The prevailing winds, generally from the southeast, play a crucial role in dispersing or concentrating airborne particles.

Kaoma’s tropical savanna climate dictates a distinct wet and dry season cycle, profoundly impacting air quality. The dry season, typically spanning May to October, is characterized by lower rainfall and increased temperatures. This period often sees a rise in particulate matter concentrations due to the prevalence of dust storms originating from the exposed agricultural fields and unpaved roads. The lack of rainfall means less atmospheric cleansing, and the drier air facilitates the suspension of dust particles. Temperature inversions are more frequent during the cooler dry season nights, trapping pollutants close to the ground. Conversely, the wet season (November to April) brings frequent rainfall, which naturally washes pollutants from the atmosphere, leading to improved air quality. However, the wet season isn't entirely benign; agricultural burning, a common practice for land clearing and crop residue disposal, can release significant amounts of smoke and particulate matter, particularly in the early months of the season. Fog, occasionally forming during the cooler mornings of the wet season, can also trap pollutants, creating localized episodes of reduced visibility and potentially impacting respiratory health. Sensitive groups, including children, the elderly, and individuals with pre-existing respiratory conditions, should exercise caution during the dry season, particularly during periods of high dust activity. Outdoor activities are generally more favourable during the wet season, although vigilance regarding agricultural burning is advised. The transition months (April/May and October/November) often present unpredictable air quality conditions, influenced by shifting wind patterns and the interplay between drying conditions and residual moisture.