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Kherālu, a municipality in the Panchmahal district of Gujarat, India, occupies a relatively flat terrain typical of the eastern Gujarat plains. Situated at coordinates 23.8800°N, 72.6200°E, the city’s elevation is modest, contributing to limited natural dispersion of pollutants. The surrounding landscape is predominantly agricultural, characterized by farmland dedicated to cotton, tobacco, and various food crops. This agricultural activity, while vital to the local economy, introduces potential sources of particulate matter through farming practices like stubble burning and fertilizer application. Kherālu isn’t directly adjacent to major bodies of water, though smaller rivers and seasonal streams crisscross the region, influencing local humidity and potentially trapping pollutants during temperature inversions. The city’s position isn’t within a heavily industrialized belt like those found closer to Ahmedabad or Vadodara, but regional industrial activity and transportation networks contribute to background pollution levels. The urban-rural gradient is fairly sharp; Kherālu itself is a relatively small urban center surrounded by a largely rural hinterland. This proximity means pollutants generated within the city can quickly impact surrounding villages, and vice versa. The prevailing wind patterns, influenced by the monsoon and post-monsoon seasons, play a crucial role in pollutant transport and dispersion, or lack thereof, within this localized geographical setting.

Kherālu experiences a distinct seasonal air quality pattern. The post-monsoon period (October-November) often sees a peak in pollution, driven by stagnant air following the monsoon’s retreat, coupled with increased agricultural burning as farmers prepare fields for Rabi crops. Temperature inversions are common during these cooler months, trapping pollutants near ground level. December to February brings relatively cleaner air, benefiting from moderate wind speeds and occasional rainfall that helps to wash away particulate matter. However, dust from agricultural activities remains a concern. March to May marks a gradual deterioration in air quality as temperatures rise and dry conditions prevail. Dust storms are frequent, significantly increasing particulate matter concentrations. The pre-monsoon season (June) is characterized by hot, dry winds and a build-up of pollutants before the monsoon arrives. The monsoon season (July-September) generally offers the cleanest air, as heavy rainfall effectively scrubs the atmosphere. However, increased humidity can also promote the formation of secondary pollutants. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during October-November and March-May. Monitoring local conditions and heeding health advisories is crucial throughout the year.