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Pageralam, nestled in the province of South Sumatra, Indonesia, occupies a geographically significant position within the island’s interior highlands. Located at approximately -4.0167° latitude and 103.2500° longitude, the city’s elevation, averaging around 700 meters above sea level, contributes to a cooler climate compared to coastal regions of Sumatera Selatan. The surrounding landscape is dominated by rolling hills and dense tropical rainforest, a characteristic feature of the Bukit Barisan mountain range that stretches across Sumatra. This terrain influences local wind patterns, often creating localized areas of stagnant air, particularly during periods of low wind speed. Pageralam sits within a transitional zone between the densely forested highlands and the agricultural lowlands to the east, where extensive palm oil plantations and rubber estates are prevalent. This proximity to agricultural zones introduces potential sources of air pollutants, including smoke from land clearing practices, although the city itself is not a major industrial hub. The urban–rural gradient around Pageralam is relatively gradual, with small villages and agricultural areas blending seamlessly into the city’s periphery. The Musi River, though not directly adjacent to the city center, influences regional hydrology and can impact humidity levels, which in turn affects the dispersion of pollutants. The city’s location inland, shielded by the surrounding hills, can trap pollutants, especially when combined with unfavorable meteorological conditions.

Pageralam’s tropical climate dictates a distinct wet and dry season, profoundly impacting its air quality. The dry season, typically spanning from June to September, presents the most significant air quality challenges. Reduced rainfall and lower humidity create conditions conducive to the accumulation of particulate matter. Agricultural burning, a common practice for land preparation in the surrounding plantations, intensifies during this period, releasing substantial amounts of smoke and haze that can blanket the city. Temperature inversions, where cooler air is trapped beneath a layer of warmer air, are also more frequent during the dry season, further hindering vertical mixing and trapping pollutants near the ground. The wet season, from October to May, brings increased rainfall and higher humidity, naturally cleansing the atmosphere and dispersing pollutants. However, periods of persistent fog, particularly in the mornings, can temporarily reduce visibility and trap moisture-laden pollutants. Wind patterns play a crucial role; consistent easterly winds during the wet season generally help to flush out pollutants, while calmer conditions during the dry season exacerbate the problem. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, limiting outdoor activities during peak haze periods and ensuring adequate ventilation indoors. The months of August and September often experience the worst air quality due to the combined effects of agricultural burning and temperature inversions.