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Nagnur, a town in Karnataka, India, rests at coordinates 16.1400°N, 74.8100°E, nestled within the undulating terrain of the Western Ghats foothills. With a population of 13,459, Nagnur’s geography is defined by its rural character and proximity to agricultural lands, primarily sugarcane and cotton cultivation. The surrounding landscape is a mosaic of fields, interspersed with small hills and patches of deciduous forest. The town’s elevation, approximately 650 meters above sea level, influences local weather patterns and contributes to temperature variations. While not directly adjacent to a major body of water, Nagnur benefits from seasonal streams and groundwater resources vital for agriculture. The nearest significant urban centre is Hubballi-Dharwad, creating an urban-rural gradient where Nagnur serves as a market town for surrounding villages. Air quality is intrinsically linked to this agricultural dominance; seasonal burning of crop residue after harvest is a significant localised emission source. Dust from unpaved roads and agricultural activities also contributes to particulate matter. The town’s location within a valley can sometimes trap pollutants, exacerbating air quality issues, particularly during calmer weather conditions. Limited industrial activity within Nagnur itself means regional transport emissions are a more prominent factor.

Nagnur experiences a distinct wet and dry season pattern, heavily influenced by the Southwest Monsoon. Air quality generally improves dramatically during the monsoon months (June-September) as rainfall effectively washes away particulate matter and suppresses dust. However, increased humidity can foster mould growth, potentially impacting respiratory health. The post-monsoon period (October-November) sees a gradual deterioration in air quality as agricultural activities intensify, including the burning of sugarcane stalks after harvest – a major source of localised smoke and particulate pollution. This is often the most challenging period for those with respiratory sensitivities. Winter (December-February) brings cooler temperatures and often temperature inversions, trapping pollutants near the ground, particularly in the mornings. Dry conditions exacerbate dust from roads and fields. March-May, the pre-monsoon period, is characterised by rising temperatures and strong winds, which can stir up dust and contribute to hazy conditions. This period sees a build-up of pollutants before the cleansing rains arrive. Sensitive groups – children, the elderly, and those with pre-existing respiratory conditions – should limit outdoor exposure during the post-monsoon and winter months, and consider using masks when venturing outside.