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Singur, a small town in the Hooghly district of West Bengal, India, lies at coordinates 22.8100°N, 88.2300°E. Its geography is characteristic of the Gangetic plains – a flat, low-lying alluvial terrain formed by the deposition of sediments from the Ganges and its tributaries. The elevation is minimal, averaging around 15 meters above sea level, contributing to limited natural dispersion of pollutants. Singur is situated approximately 35 kilometers northwest of Kolkata, placing it within the extended urban agglomeration’s sphere of influence. Historically an agrarian region, Singur’s landscape was dominated by paddy fields and wetlands, but this has undergone significant transformation following industrial development, particularly the now-relocated Tata Nano car factory. The surrounding areas are a mix of agricultural land, small villages, and increasingly, industrial zones. This urban-rural gradient is crucial; prevailing winds can carry pollutants from Kolkata and other industrial hubs towards Singur, while local agricultural practices, including seasonal crop burning, contribute to localized air pollution. The proximity to the Rupnarayan River offers some limited natural ventilation, but its effect is often overshadowed by stagnant air conditions, especially during winter months. The flat terrain hinders pollutant dispersal, exacerbating air quality issues.

Singur’s air quality follows a distinct seasonal pattern dictated by the monsoon and post-monsoon weather systems. The monsoon season (June-September) generally brings temporary relief, as heavy rainfall washes away particulate matter and increased humidity suppresses dust. However, this is often followed by a period of high humidity and stagnant air. October-November sees a deterioration in air quality as temperatures drop and temperature inversions become more frequent, trapping pollutants near the ground. This period coincides with post-harvest crop residue burning, a significant contributor to particulate matter. Winter (December-February) is typically the worst period for air quality, with consistently poor ventilation and increased reliance on biomass burning for heating. March-May brings rising temperatures and drier conditions, leading to increased dust and potential for localized fires, further degrading air quality. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during the winter and post-monsoon months. Avoiding peak traffic hours and exercising indoors on poor air quality days is advisable. The monsoon offers the most favourable conditions for outdoor activity, but vigilance regarding waterborne diseases is necessary.