Murshidābād Air Quality Index (AQI)

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Murshidābād, a historic city in the state of West Bengal, India, occupies a relatively flat alluvial plain within the Ganges Delta. Situated at approximately 24.18°N latitude and 88.27°E longitude, the city’s geography is profoundly shaped by the Bhagirathi River, a major distributary of the Ganges, which flows nearby. The surrounding landscape is predominantly agricultural, characterized by intensely cultivated rice paddies and jute fields, interspersed with pockets of rural settlements. Elevation is low, generally below 20 meters, contributing to limited atmospheric dispersion of pollutants. Historically a significant centre of power during the Mughal period, Murshidābād’s urban character reflects a blend of architectural styles, though modern development is increasingly impacting the traditional layout. The urban-rural gradient is quite sharp, with agricultural land immediately bordering the city limits. This proximity to agricultural activities introduces sources of particulate matter from crop residue burning and fertilizer use. Furthermore, the region experiences seasonal flooding, which can exacerbate air quality issues by mobilizing dust and pollutants. The lack of significant industrial belts *within* Murshidābād itself doesn’t preclude regional industrial contributions to background pollution levels, transported by prevailing winds. The flat terrain and limited natural ventilation channels create conditions conducive to pollutant accumulation, particularly during periods of calm weather.

Murshidābād’s air quality follows a distinct seasonal pattern dictated by the monsoon and post-monsoon weather systems. The monsoon season (June-September) generally brings temporary relief from pollution due to rainfall which effectively scrubs the air of particulate matter. However, increased humidity can also foster mould growth, impacting respiratory health. October-November sees a deterioration in air quality as the monsoon retreats, and temperatures drop, leading to temperature inversions that trap pollutants near the ground. This post-monsoon period is often associated with increased agricultural burning of crop residue, further exacerbating particulate matter levels. Winter (December-February) is typically the worst period for air quality, with consistently low temperatures, calm winds, and frequent fog, trapping pollutants. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during these months. March-May brings rising temperatures and increasing wind speeds, gradually improving air quality, though dust storms can occasionally occur. The pre-monsoon heat can also contribute to the formation of ground-level ozone. Avoiding strenuous outdoor activity during peak heat hours and monitoring local conditions is advisable. Overall, the months of December through February pose the greatest risk to respiratory health, while the monsoon season offers the most favourable conditions.