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Nestled in the heart of Chhattisgarh's tribal belt, Kanker occupies a strategic position at the crossroads of central India's forested highlands and agricultural plains. Situated at coordinates 20.2710°N, 81.4940°E, this small urban centre with a population of 33,000 lies approximately 140 kilometres south of Raipur, the state capital, placing it within the broader industrial and mining corridor of the Chhattisgarh region. The town's elevation of roughly 400 metres above sea level on the undulating terrain of the Bastar Plateau creates a basin-like topography that significantly influences air quality by trapping pollutants. Kanker is surrounded by dense deciduous forests to the south and east, while its western and northern fringes transition into agricultural zones dominated by paddy fields, contributing seasonal biomass burning emissions. The Mahanadi River basin lies to the north, but Kanker itself lacks major water bodies, reducing natural ventilation effects. The urban-rural gradient is pronounced, with the compact town centre characterised by low-rise buildings and unpaved roads generating substantial road dust, while the periphery blends into rural settlements where domestic biomass burning is prevalent. This geographic setting, combined with its location in a tropical wet-and-dry climate zone, creates a complex air quality dynamic where local emissions from vehicles, construction, and domestic sources interact with regional pollution from forest fires and agricultural burning, often accumulating due to the terrain-induced stagnation.

Kanker's air quality follows a distinct seasonal rhythm shaped by its tropical wet-and-dry climate and local emission patterns. During the winter months from November to February, pollution peaks dramatically due to a combination of meteorological and anthropogenic factors. Cooler temperatures and frequent temperature inversions trap pollutants close to the ground, while calm winds and morning fog further reduce dispersion. This period coincides with post-harvest agricultural residue burning in surrounding farmlands and increased domestic biomass burning for heating, creating a hazardous mix of particulate matter. Sensitive groups such as children, the elderly, and those with respiratory conditions should minimise outdoor activities during these months, especially in the early mornings when pollution concentrations are highest. The summer season from March to May brings extreme heat that can elevate ozone levels, though stronger daytime winds and convective activity provide some ventilation, making late evenings the best time for outdoor exertion. The monsoon from June to September offers the cleanest air, as heavy rainfall from thunderstorms scrubs the atmosphere and suppresses dust and fire emissions, though flooding can temporarily stir up sediments. The post-monsoon period in October sees a gradual return of pollution as dry conditions set in and agricultural burning begins. Year-round, road dust and vehicle exhaust remain persistent concerns, exacerbated by the town's unpaved surfaces and growing motorisation.