Loading air quality context...

Keota, Bihar, situated at approximately 25.6440° N, 85.8287° E, occupies a geographically significant position within the fertile Gangetic plains of eastern India. The town’s terrain is predominantly flat, characteristic of the Indo-Gangetic alluvial plain, resulting in minimal elevation changes. This flatness, while conducive to agriculture, also contributes to air quality challenges as it limits natural dispersion of pollutants. Keota lies within the broader Bihar region, a densely populated state with a substantial agricultural economy. Surrounding Keota is a mosaic of agricultural land, primarily dedicated to rice and maize cultivation, interspersed with smaller villages and rural settlements. The urban–rural gradient is relatively gradual, with agricultural activities extending close to the town’s periphery. While Keota itself is a small town, it benefits from its proximity to larger regional hubs, potentially experiencing some indirect impacts from industrial activity further afield, particularly related to transportation and agricultural processing. The absence of significant natural barriers, such as hills or mountains, means that pollutants released within the region can readily spread across the landscape. The local climate, dominated by a monsoon season and hot, dry periods, further influences atmospheric conditions and pollutant behaviour. The flat topography and surrounding agricultural landscape create a setting where stagnant air conditions and localized emissions can readily accumulate, impacting air quality within Keota.

Keota’s air quality experiences a distinct seasonal cycle heavily influenced by the region’s monsoonal climate. The pre-monsoon months (March-May) typically see the poorest air quality, characterized by hot, dry conditions and frequent temperature inversions. These inversions trap pollutants close to the ground, exacerbating existing emissions from agricultural practices like crop residue burning, a common practice in Bihar. Dust storms, prevalent during this period, further degrade air quality, increasing particulate matter concentrations. The arrival of the monsoon (June-September) brings a significant improvement, as rainfall washes away pollutants and strong winds disperse them. However, even during the monsoon, localized pollution from agricultural activities and vehicular emissions can persist. The post-monsoon season (October-November) often mirrors the pre-monsoon period, with decreasing rainfall and the return of temperature inversions, leading to a renewed deterioration in air quality. The winter months (December-February) are generally cooler, with periods of dense fog, which can trap pollutants and reduce visibility. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the pre-monsoon and post-monsoon seasons, limiting outdoor activities during peak pollution periods. Agricultural workers are particularly vulnerable and should utilize appropriate respiratory protection. Maintaining indoor air quality through ventilation and air purification can also offer some relief during periods of poor air quality.