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Kofelē, nestled within the Oromīya region of Ethiopia at coordinates 7.0000, 38.7500, is a small city of approximately 13,127 inhabitants. Its geography is defined by the Ethiopian Highlands, a rugged and elevated plateau that dominates much of the country. Kofelē itself sits at a considerable elevation, contributing to cooler temperatures than lower-lying areas, but also influencing atmospheric circulation. The surrounding landscape is characterised by rolling hills, interspersed with agricultural land – primarily smallholder farms cultivating crops like teff, coffee, and barley. There are no major bodies of water immediately adjacent to Kofelē, though seasonal streams and rivers are present, dependent on rainfall patterns. The urban-rural gradient is quite sharp; Kofelē represents a concentrated settlement within a predominantly agricultural matrix. While not a major industrial centre, localised processing of agricultural products and small-scale manufacturing contribute to potential emission sources. Dust from unpaved roads and agricultural activities is a significant factor. The city’s position within a valley or basin, common in the highlands, can exacerbate pollution by trapping air masses and hindering dispersion, particularly during periods of calm weather. This topographic constraint is crucial to understanding Kofelē’s air quality challenges.

Kofelē experiences a distinct wet and dry season, rather than traditional four seasons. Air quality in Kofelē is most compromised during the dry season, typically from November to February. Reduced rainfall means less atmospheric cleansing, allowing particulate matter from dust, agricultural burning, and local industry to accumulate. Temperature inversions, common in valleys during the cooler dry season nights, trap pollutants near ground level. The wind patterns are generally calmer during this period, further hindering dispersion. March to May brings the main rainy season, offering significant improvements in air quality as rainfall washes away pollutants. However, increased humidity can also promote mold growth, impacting respiratory health. June to October represents a transitional period with intermittent rainfall. While generally better than the dry season, localised agricultural burning for land preparation can cause temporary spikes in particulate matter. Sensitive groups – children, the elderly, and those with pre-existing respiratory conditions – should limit strenuous outdoor activity during the dry season, particularly in the mornings and evenings. Monitoring local fire activity is advisable during the transitional seasons. The wet season generally offers the most favourable conditions for outdoor activity.