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Maurānwān, a small city nestled within the expansive plains of Uttar Pradesh, India, occupies a geographically significant position at 26.4300°N latitude and 80.8800°E longitude. The terrain is characteristically flat, typical of the Indo-Gangetic Plain, with a low elevation that contributes to the potential for stagnant air masses. The city’s surrounding landscape is predominantly agricultural, dominated by wheat, rice, and sugarcane cultivation. This agricultural activity, while vital to the regional economy, introduces particulate matter from crop residue burning and fertilizer use. Maurānwān is not directly adjacent to any major bodies of water, though it lies within the broader watershed of the Gomti River. The urban-rural gradient is relatively sharp; the city itself is compact, quickly transitioning to rural farmland. While not a major industrial hub, the increasing presence of small-scale brick kilns and agro-processing units in the surrounding districts contributes to localised pollution sources. The lack of significant topographical features – hills or forests – limits natural ventilation, exacerbating the concentration of pollutants during periods of low wind speed. This flat, agricultural setting, combined with emerging industrial activity, defines Maurānwān’s unique air quality challenges.

Maurānwān experiences a distinct seasonal air quality pattern dictated by the monsoon and post-monsoon periods. The summer months (April-June) bring consistently high temperatures and dry conditions, leading to dust storms and increased concentrations of particulate matter, particularly PM10. October-November, following the monsoon’s retreat, is often the worst period for air quality. Stubble burning from the harvested rice crop blankets the region in smoke, combined with cooler temperatures creating strong temperature inversions that trap pollutants near the ground. December-January sees a continuation of these conditions, often exacerbated by fog which further reduces dispersion. The monsoon season (July-September) provides a temporary respite, as rainfall effectively washes pollutants from the atmosphere and increased humidity suppresses dust. However, even during the monsoon, localised sources like brick kilns can contribute to pollution. Sensitive groups – children, the elderly, and those with respiratory conditions – should avoid prolonged outdoor activity during the post-monsoon and winter months. Monitoring wind direction is crucial; winds from agricultural areas to the west and south will likely carry higher pollutant loads. Prioritising indoor air purification and wearing masks during peak pollution times are recommended.