Marudi Air Quality Index (AQI)

Loading live AQI data...

Loading historical AQI trends...

Marudi, Sarawak, Malaysia, occupies a unique and geographically significant position within the Baram River basin. Located at approximately 4.18° N, 114.31° E, the town sits on a low-lying alluvial plain, historically a riverine settlement and now a bustling commercial hub for the surrounding rural areas. The terrain is predominantly flat, gently sloping towards the Baram River, which acts as a vital transportation artery and influences local microclimates. Marudi’s location is characterized by a gradual urban–rural gradient; the town itself represents a concentrated area of commerce and services, transitioning rapidly into extensive agricultural lands and dense rainforest. Surrounding Marudi are oil palm plantations, a dominant feature of the regional landscape and a significant contributor to the local economy. Further afield, the terrain rises into the foothills of the Malay Range, influencing regional wind patterns and potentially trapping pollutants under certain meteorological conditions. The proximity to the Baram River, while providing a crucial resource, can also contribute to humidity and localized fog formation, impacting air dispersion. The absence of major industrial belts directly within Marudi is notable, however, the region’s reliance on palm oil processing and transportation activities, coupled with occasional agricultural burning practices in surrounding areas, can influence air quality. The relatively low elevation (averaging around 30 meters above sea level) means that atmospheric conditions are generally stable, potentially exacerbating pollution episodes when they occur.

Marudi’s tropical climate dictates a distinct wet and dry season pattern, profoundly influencing its air quality. The dry season, typically spanning from March to September, often sees a slight increase in particulate matter due to agricultural activities. Controlled burns, traditionally used for land clearing and preparing fields for planting, are more prevalent during this period, releasing smoke and contributing to localized haze. While wind patterns are generally consistent throughout the year, the dry season tends to experience periods of reduced wind speed, which can trap pollutants closer to the ground. The wet season, from October to February, brings frequent rainfall and increased humidity. These conditions naturally cleanse the atmosphere, washing away particulate matter and reducing overall pollution levels. However, periods of prolonged rainfall can also lead to localized flooding, potentially releasing pollutants from inundated areas. Fog, common during the wet season, particularly in the early mornings, can significantly reduce visibility and temporarily trap pollutants near the surface. Temperature inversions, though less frequent than in temperate climates, can occasionally occur, particularly during cooler nights, further hindering vertical air mixing and concentrating pollutants. Sensitive groups, such as children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, particularly when agricultural burning is reported. Outdoor activities are generally more favourable during the wet season, although periods of heavy rain and fog can still impact air quality and visibility.