Sumber Air Quality Index (AQI)

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Sumber, nestled in the highlands of Jawa Barat, Indonesia, occupies a geographically significant position within the Bandung Regency. Located at approximately -6.7544° latitude and 108.4858° longitude, the city sits at an elevation of around 1,400 meters above sea level, contributing to a cooler climate compared to lowland areas. The surrounding landscape is dominated by the lush, rolling hills characteristic of the Priangan region, a landscape sculpted by volcanic activity and intensive agriculture. Sumber’s proximity to Mount Papandayan, an active volcano, influences local weather patterns and occasionally introduces volcanic ash into the atmosphere. The city is situated within a predominantly rural area, exhibiting a gradual urban–rural gradient as one moves away from the town center. While Sumber itself is a growing urban center, it’s surrounded by extensive tea plantations and agricultural fields, a vital component of the local economy. This agricultural activity, while providing livelihoods, can contribute to localized air pollution through the use of fertilizers and occasional burning of agricultural waste. The region’s topography, with its valleys and ridges, can trap pollutants, particularly during periods of low wind. Sumber’s location within a relatively isolated highland area means that air masses are less frequently flushed out by prevailing winds compared to coastal cities, potentially leading to pollutant accumulation. The absence of major industrial belts directly adjacent to Sumber mitigates some pollution risks, but emissions from regional industrial areas can still be transported into the region.

Sumber’s tropical highland climate dictates a distinct wet and dry season, profoundly impacting air quality. The dry season, typically spanning from May to September, often sees a gradual increase in particulate matter. Reduced rainfall during this period means less atmospheric cleansing, allowing dust and pollutants to linger. Temperature inversions, common during the cooler nights of the dry season, trap pollutants close to the ground, exacerbating the issue. Agricultural burning, though regulated, can still occur, releasing smoke and contributing to haze. The wet season, from October to April, brings frequent rainfall, which naturally washes pollutants from the atmosphere, leading to improved air quality. However, periods of prolonged fog, common during the wet season, can also trap moisture and pollutants, creating localized pockets of poor air quality. Wind patterns are generally light and variable throughout the year, but during the transition months (April/May and September/October), shifts in monsoon patterns can bring brief periods of stronger winds, temporarily dispersing pollutants. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, particularly during periods of haze or fog. Limiting outdoor exertion and wearing masks can help mitigate exposure. The cooler temperatures of the dry season can also exacerbate respiratory issues, so maintaining indoor air quality is crucial. While the wet season generally offers respite, awareness of localized fog events remains important for minimizing exposure.