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Ikoto, nestled within Eastern Equatoria State in South Sudan (4.0795° N, 33.1089° E), occupies a geographically significant position within a predominantly savanna landscape. The city’s terrain is characterized by gently undulating plains, transitioning into low hills to the south, a feature influencing local wind patterns and potential for temperature inversions. Situated at an elevation of approximately 1150 meters above sea level, Ikoto experiences a relatively cool climate compared to lower-lying regions of South Sudan. The surrounding landscape is dominated by grasslands and scattered acacia woodlands, interspersed with small-scale agricultural plots – primarily sorghum and maize cultivation – which contribute to seasonal dust emissions. While Ikoto lacks immediate proximity to major rivers, it draws water from seasonal streams and boreholes, impacting local humidity levels. The urban–rural gradient is relatively sharp; the city itself is compact, with a clear delineation between the built environment and the surrounding agricultural lands. There are no significant industrial belts nearby; economic activity is largely centered on local trade, agriculture, and pastoralism. The lack of heavy industry is a mitigating factor for air pollution, however, the prevalence of wood-fired cooking stoves within the community, coupled with seasonal agricultural practices like bush burning, and the frequent dust storms characteristic of the savanna biome, are key determinants of Ikoto’s air quality profile. The regional position, far from major urban centers, limits external pollution sources, but amplifies the impact of local emissions.

Ikoto’s air quality is intrinsically linked to its distinct wet and dry seasons. The dry season, typically spanning from December to March, presents the most challenging period. Reduced rainfall leads to parched vegetation and exposed soil, resulting in frequent and intense dust storms. These storms, driven by prevailing winds, significantly elevate particulate matter in the air, impacting visibility and respiratory health. Temperature inversions, common during the cooler nights of the dry season, can trap pollutants near the ground, exacerbating the situation. The months of January and February are particularly prone to these conditions, making outdoor activity for vulnerable populations – children, the elderly, and those with pre-existing respiratory conditions – inadvisable. Conversely, the wet season (April to November) brings a period of relative improvement. Rainfall washes away dust and particulate matter, and increased humidity helps to suppress dust generation. However, the burning of agricultural waste after harvests, particularly in October and November, can lead to localized spikes in smoke and carbon monoxide. The monsoon-like rains, while beneficial for cleansing the air, can also temporarily increase humidity, potentially triggering mold growth and affecting indoor air quality. During the transition months (March and December), fluctuating wind patterns and variable rainfall create unpredictable air quality conditions. It is recommended that sensitive individuals monitor local conditions and limit outdoor exposure during periods of high dust or smoke.