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Mahemdāvād, a municipality in the Kheda district of Gujarat, India, occupies a relatively flat terrain typical of the broader Gujarat plains. Situated at coordinates 22.8300°N, 72.7700°E, the city’s geography is defined by its position within the fertile plains between the Sabarmati and Mahi rivers, though it isn’t directly adjacent to either. The surrounding landscape is predominantly agricultural, characterized by cotton, wheat, and vegetable farming, interspersed with smaller industrial units. This mix of agrarian and light industrial activity significantly influences local air quality. The urban-rural gradient is fairly sharp, with the city centre exhibiting denser construction and traffic, while the periphery quickly transitions into farmland. The relatively low elevation contributes to potential temperature inversions, trapping pollutants near the ground. Mahemdāvād’s location within Gujarat, a state with a substantial industrial base, means it’s susceptible to regional transport of pollutants from larger urban and industrial centres like Ahmedabad and Vadodara. Dust from agricultural practices, particularly during harvest seasons, is a consistent contributor to particulate matter. The lack of significant natural barriers to wind flow means pollutants can disperse, but also be readily carried *to* the city from upwind sources. This interplay of factors creates a complex air quality profile.

Mahemdāvād 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 and stagnant air create ideal conditions for dust storms and the build-up of pollutants from agricultural burning and local industry. October and November, following the monsoon’s retreat, often see a resurgence in pollution as temperatures drop and temperature inversions become more frequent, trapping emissions. The monsoon season (June to September) generally brings a temporary respite, with rainfall effectively washing away particulate matter and increased humidity suppressing dust. However, even during the monsoon, localised pollution from traffic and smaller industries persists. Winter months (December to February) can experience moderate pollution due to temperature inversions and increased use of solid fuels for heating. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during the pre-monsoon and post-monsoon periods. Avoiding peak traffic hours and wearing masks can offer some protection. Monitoring local conditions and heeding health advisories is crucial.