Leer Air Quality Index (AQI)

Loading live AQI data...

Loading historical AQI trends...

Leer, situated in Unity State, South Sudan (8.3031° N, 30.1406° E), occupies a precarious position within the vast, flat expanse of the White Nile floodplain. The city’s geography is fundamentally shaped by its location on the banks of the White Nile, a major artery of the region, and its proximity to the swampy Sudd wetlands. Leer’s terrain is predominantly alluvial, characterized by low-lying, easily inundated plains, resulting in frequent flooding, particularly during the rainy season. Elevation is minimal, rarely exceeding a few meters above the surrounding floodplains, contributing to poor air circulation and potential pollutant stagnation. The surrounding landscape is dominated by savanna grasslands and scattered acacia woodlands, interspersed with extensive areas of papyrus and reeds typical of the Sudd. Agriculture, primarily subsistence farming focused on sorghum and maize, is a significant land use in the immediate vicinity, and seasonal burning of agricultural residues can contribute to localized air pollution. There's a gradual urban–rural gradient extending outwards from Leer, transitioning from densely populated areas to sparsely populated agricultural zones and ultimately to the expansive wetlands. The absence of significant industrial belts within close proximity is a mitigating factor, though reliance on biomass fuels (wood and charcoal) for cooking and heating within Leer itself represents a substantial source of particulate matter. The flat topography and limited natural barriers exacerbate the impact of any pollution sources, allowing pollutants to spread readily across the low-lying landscape.

Leer’s climate dictates a distinct wet and dry season pattern, profoundly influencing air quality. The dry season, typically from December to March, is characterized by lower rainfall and increased temperatures. While the lack of rain reduces the scrubbing effect of precipitation, the prevailing winds during this period often originate from the north, potentially carrying dust and particulate matter from the Sahara Desert, though the distance moderates this effect. Temperature inversions, though less frequent than in cooler climates, can occasionally occur, trapping pollutants close to the ground, especially during calmer nights. The wet season, from April to November, brings torrential rainfall and high humidity. While the rain itself helps to cleanse the air, the increased humidity can exacerbate respiratory issues for sensitive individuals. Burning of agricultural waste is most prevalent at the start of the dry season, creating periods of elevated particulate matter. Fog, a relatively rare occurrence, can form during cooler mornings in the dry season, trapping pollutants and reducing visibility. The months of February and March often experience a noticeable increase in dust and smoke, making outdoor activity less advisable for those with asthma or other respiratory conditions. During the peak of the rainy season (July-August), air quality generally improves due to frequent rainfall, but the risk of waterborne diseases increases. Sensitive groups, including children, the elderly, and individuals with pre-existing respiratory or cardiovascular conditions, should limit prolonged outdoor exposure during periods of smoke or fog, and prioritize indoor air quality through ventilation.