Ahmedabad, situated in the semi-arid plains of Gujarat in western India, occupies a strategic position along the banks of the Sabarmati River, which bisects the city into eastern and western sectors. The urban landscape unfolds on relatively flat terrain at an elevation of approximately 53 meters above sea level, with the Aravalli Range lying to the northeast, though distant enough to offer minimal topographic influence on local air circulation. This geography places Ahmedabad within the densely populated and industrially vibrant Ahmedabad-Vadodara industrial corridor, a hub for textile manufacturing, chemical production, and pharmaceutical industries that significantly contribute to particulate and gaseous emissions. The city's location in the heart of Gujarat's agricultural belt means seasonal crop residue burning in surrounding rural areas exacerbates pollution, particularly during post-harvest periods. Proximity to the Gulf of Khambhat, about 100 kilometers to the southwest, provides some maritime influence, but the semi-arid climate limits precipitation's cleansing effect for much of the year. The urban-rural gradient is sharp, with rapid expansion into peri-urban zones increasing construction activity and road dust. This combination of industrial concentration, agricultural hinterland, and constrained atmospheric dispersion due to the flat terrain creates a perfect storm for air quality degradation, trapping pollutants under frequent temperature inversions.

Ahmedabad's air quality follows a distinct seasonal pattern shaped by its semi-arid climate and monsoon cycle. During winter (November to February), pollution peaks dramatically as cold, stable atmospheric conditions foster temperature inversions that trap vehicle exhaust, industrial emissions, and dust near the surface, compounded by agricultural burning from nearby fields. This period sees frequent fog and haze, making it the worst time for outdoor activity, especially for sensitive groups like children, the elderly, and those with respiratory conditions who should limit exposure and use air purifiers indoors. Spring (March to May) brings extreme heat, which can increase ozone formation from precursor pollutants, though stronger daytime winds offer some dispersion; however, heatwaves may still elevate health risks. The monsoon (June to September) provides relief as heavy rainfall washes away particulate matter, resulting in the cleanest air of the year—ideal for outdoor pursuits. Post-monsoon (October) marks a transition as drying conditions and reduced winds allow pollution to accumulate again. To minimize health impacts, residents should monitor air quality indices, avoid strenuous activities during peak pollution months, and seek indoor environments with filtered air during hazardous episodes.