Bramhabarada, a small town in the Khordha district of Odisha, India, occupies a relatively flat terrain typical of the coastal plains of eastern India. Situated at coordinates 20.6683°N, 86.0747°E, its elevation is low, contributing to limited atmospheric dispersion of pollutants. The town’s location is approximately 20km southwest of Bhubaneswar, the state capital, and benefits from proximity to the Daya River, a distributary of the Mahanadi. This riverine influence, while providing a water source, also creates conditions conducive to humidity and potential fog formation, impacting air quality. Surrounding Bramhabarada are predominantly agricultural lands, primarily rice paddies, with pockets of rural settlements. The urban-rural gradient is quite sharp, with Bhubaneswar representing a significant concentration of industry and traffic. While Bramhabarada itself doesn’t host heavy industry, it experiences a degree of ‘transport pollution’ due to its connectivity to the capital. The coastal location means the town is susceptible to monsoon winds and cyclonic disturbances originating in the Bay of Bengal, which can both disperse and concentrate pollutants depending on the weather system’s intensity and direction. The surrounding landscape is largely alluvial, with limited topographical features to break up wind flow, meaning pollutants can accumulate during stable atmospheric conditions. This geographical setting dictates the town’s unique air quality challenges.

Bramhabarada’s air quality follows a distinct seasonal pattern heavily influenced by the monsoon cycle. The pre-monsoon months of March to May are typically the worst, with rising temperatures and stagnant air leading to increased concentrations of dust and particulate matter from agricultural activities and road traffic. This period sees a build-up of pollutants before the cleansing rains arrive. The southwest monsoon, from June to September, brings significant relief, washing away pollutants and improving air quality considerably. However, high humidity during this period can also foster mould growth, potentially impacting respiratory health. October and November witness a transitional phase, with decreasing rainfall and a gradual return of drier conditions, leading to a slight deterioration in air quality. The winter months, December to February, often experience temperature inversions, trapping pollutants near the ground, particularly during calm, foggy mornings. This is a period of concern for those with pre-existing respiratory conditions. Sensitive groups – children, the elderly, and individuals with asthma – should limit outdoor exposure during the pre-monsoon and winter seasons. Monitoring wind patterns is crucial; winds from the northwest during winter can carry pollutants from industrial areas towards Bramhabarada.