Beaufort Air Quality Index (AQI)

Loading live AQI data...

Loading historical AQI trends...

Beaufort, Sabah, Malaysia, nestled along the southwest coast of Borneo, occupies a geographically significant position within the Sabah region. Its coordinates (5.3473, 115.7455) place it within a low-lying coastal plain, characterized by alluvial soils deposited by the Beaufort River, which bisects the town. The surrounding landscape is a mosaic of mangrove forests, coastal wetlands, and gently sloping hills transitioning into the rugged interior of Borneo. Elevation is minimal, rarely exceeding 30 meters above sea level, contributing to a relatively uniform temperature profile. Beaufort’s proximity to the South China Sea influences local weather patterns and can impact air quality through sea breezes and occasional marine aerosol deposition. The town serves as a crucial transportation hub, historically significant for river trade and now connected by road and rail, facilitating movement of goods and people. While Beaufort itself is a relatively small urban centre with a population of approximately 12,742, it sits within a broader agricultural zone, with oil palm plantations dominating the surrounding countryside. This agricultural activity, while economically vital, can contribute to localized air pollution through biomass burning during land clearing and fertilizer application. The urban–rural gradient is gradual, with small villages and agricultural holdings interspersed throughout the landscape. The lack of significant topographic barriers means that pollutants, once generated, can disperse relatively easily, though prevailing winds and coastal influences play a crucial role in their distribution. The town’s flat terrain and coastal location make it susceptible to flooding during periods of heavy rainfall, which can temporarily exacerbate air quality issues by resuspending particulate matter.

Beaufort’s tropical climate dictates a wet and dry season pattern, significantly influencing its air quality profile. The wet season, typically spanning November to May, brings consistent rainfall and high humidity. While the rain itself can help cleanse the atmosphere by washing away particulate matter, the associated cloud cover often leads to reduced wind speeds and increased atmospheric stability. This can occasionally trigger temperature inversions, particularly during calmer periods, trapping pollutants closer to the ground. The dry season, from June to October, is characterized by lower rainfall and higher temperatures. While wind speeds generally increase during this period, facilitating pollutant dispersion, agricultural activities intensify, leading to increased biomass burning for land preparation and maintenance of oil palm plantations. This burning releases significant quantities of particulate matter and gaseous pollutants, often resulting in periods of poorer air quality. Fog, a relatively infrequent occurrence, can also develop during the cooler, calmer nights of the wet season, further trapping pollutants. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during periods of intense agricultural burning, typically observed in September and October. During the wet season, periods of prolonged cloud cover and reduced wind speeds can also warrant reduced outdoor exertion. While the coastal location generally provides some degree of air purification through sea breezes, the impact of local agricultural practices remains a key factor in Beaufort’s air quality fluctuations. Maintaining awareness of regional fire alerts and adhering to public health advisories is crucial for minimizing exposure to potential air pollution episodes.