Swedru Air Quality Index (AQI)

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Swedru, located in the Central Region of Ghana at approximately 5.5371° N, -0.6998° E, occupies a geographically significant position within the coastal savanna transitional zone. The city’s terrain is generally flat, characteristic of the low-lying plains that stretch inland from the Atlantic coast, resulting in limited natural elevation to facilitate air dispersion. Swedru sits near the Pra River, a major waterway that influences local humidity and temperature patterns. The surrounding landscape is a mix of agricultural land – predominantly cocoa, cassava, and plantain farms – and smaller settlements, creating a gradual urban-rural gradient. This proximity to intensive agricultural practices contributes to localized air pollution from burning vegetation and fertilizer use. Further inland, the savanna gradually transitions to forest, impacting prevailing wind patterns and potentially trapping pollutants under certain meteorological conditions. The city’s location within a relatively densely populated region of Ghana means it’s influenced by regional industrial activity, though Swedru itself is not a major industrial hub. However, the transportation of goods and people through the area, along major roadways, introduces vehicular emissions. The flat topography and coastal proximity mean that sea breezes can play a role in dispersing pollutants, but also contribute to humidity and potential fog formation, which can exacerbate air quality issues by trapping pollutants close to the ground. The lack of significant natural barriers means Swedru is susceptible to pollutants originating from further afield, carried by prevailing winds.

Swedru experiences a tropical climate with distinct wet and dry seasons, significantly impacting its air quality profile. The dry season, typically spanning from November to April, often sees a build-up of pollutants. Reduced rainfall means less atmospheric cleansing, and the lower humidity allows for dust and particulate matter to remain suspended in the air for longer periods. Agricultural burning, a common practice for land preparation, intensifies during this period, releasing significant amounts of smoke and particulate matter. Temperature inversions, where cooler air is trapped beneath warmer air, are more frequent during the dry season, further hindering vertical mixing and trapping pollutants near the ground. The harmattan winds, a dry, dusty trade wind blowing from the Sahara, can also exacerbate particulate matter levels, particularly in January and February. The wet season, from May to October, generally brings improved air quality due to frequent rainfall that washes pollutants from the atmosphere. However, periods of intense rainfall can lead to flooding, which can stir up dust and mold spores, temporarily degrading air quality. Fog, common during the transitional periods between wet and dry seasons, can also trap pollutants. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, particularly during periods of agricultural burning or when the harmattan winds are strong. Limiting outdoor exertion and wearing masks can help mitigate exposure. During the wet season, be mindful of potential allergens released during flooding events.