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Jori Kalān, nestled within the state of Jharkhand, India, occupies a geographically significant position at coordinates 24.2045°N, 84.8770°E. The town’s landscape is characterised by the undulating terrain typical of the Chota Nagpur Plateau, a region rich in mineral resources. Situated at an elevation of approximately 350 meters, Jori Kalān benefits from a relatively temperate climate, though susceptible to seasonal variations. The surrounding area is predominantly rural, dominated by agricultural lands – primarily rice paddies and small-scale farming – interspersed with forested patches. The proximity to the Damodar River valley influences local humidity and can contribute to localised fog formation during cooler months. While not directly within a major industrial belt, the wider Jharkhand region is heavily industrialised, particularly concerning coal mining and steel production, and prevailing winds can transport pollutants towards Jori Kalān. The urban-rural gradient is pronounced; Jori Kalān serves as a market town for surrounding villages, experiencing increased vehicular traffic and localised emissions. Dust from unpaved roads and agricultural practices also contributes to particulate matter in the air. The town’s location within a plateau region limits air dispersion, potentially exacerbating pollution episodes.

Jori Kalān experiences a distinct seasonal air quality pattern dictated by the monsoon and post-monsoon periods. The pre-monsoon months of March to May are typically the worst for air quality. Rising temperatures create unstable atmospheric conditions, trapping pollutants near the ground, and increased agricultural burning adds to particulate matter. The onset of the monsoon in June-September brings significant relief, as rainfall effectively washes away pollutants and increased humidity suppresses dust. However, the monsoon can also lead to localised flooding, potentially spreading contaminants. Post-monsoon, from October to November, sees a gradual deterioration in air quality as temperatures cool and wind speeds decrease, creating conditions for temperature inversions. This traps pollutants, particularly from biomass burning for cooking and heating. Winter, December to February, often experiences foggy conditions, further reducing air dispersion. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during March-May and October-November. Avoiding peak traffic hours and using masks when outdoors are recommended. The monsoon months generally offer the cleanest air, but vigilance regarding waterborne diseases is crucial.