Gohpur Air Quality Index (AQI)

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Gohpur, Assam, nestled in the Brahmaputra Valley, occupies a geographically significant position within India’s northeastern region. Located at approximately 26.88°N, 93.61°E, the town’s terrain is predominantly alluvial, a direct consequence of the Brahmaputra River’s sediment deposition over millennia. The elevation is relatively low, averaging around 125 meters above sea level, contributing to a generally flat landscape. This low elevation, combined with the valley’s topography, can exacerbate air pollution episodes by trapping pollutants close to the ground. Gohpur’s proximity to the Brahmaputra River itself influences local climate and humidity, which can affect the dispersion of airborne particles. The surrounding landscape is a mosaic of agricultural fields – primarily rice cultivation – interspersed with pockets of tropical forests and tea gardens, characteristic of Assam’s rural character. The urban–rural gradient around Gohpur is gradual; the town serves as a local trading hub for the surrounding agricultural communities. While not directly adjacent to major industrial belts, the region experiences agricultural burning during post-harvest seasons, a significant contributor to particulate matter. The valley’s enclosed nature, bordered by the foothills of the Himalayas to the north, can limit wind speeds and promote stagnant air conditions, particularly during cooler months, further impacting air quality. The town’s small size (population 12,433) means that local vehicular traffic and small-scale industries are the primary sources of pollution, though regional agricultural practices have a broader impact.

Gohpur’s air quality follows a distinct seasonal pattern dictated by the region’s monsoon climate. The monsoon season, typically from June to September, brings heavy rainfall and strong winds, generally leading to improved air quality as pollutants are washed away and dispersed. However, the preceding pre-monsoon period (March-May) often witnesses a concerning rise in air pollution, primarily due to agricultural burning. Farmers clearing crop residue after the harvest season release substantial amounts of smoke and particulate matter into the atmosphere. This period is characterized by drier conditions and calmer winds, which trap these pollutants. The post-monsoon season (October-November) also sees a gradual increase in pollution as humidity decreases and agricultural activities resume. Winter months (December-February) are often marked by fog, which further concentrates pollutants near the ground, reducing visibility and potentially increasing exposure. Temperature inversions, common during winter nights, trap cooler air and pollutants beneath a layer of warmer air. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the pre-monsoon and winter months, limiting outdoor activities during peak pollution periods. The humid climate generally mitigates the severity of dry particulate matter impacts compared to drier regions, but prolonged exposure to elevated pollution levels remains a concern. Maintaining indoor air quality through ventilation and air purification can be beneficial during periods of poor air quality.