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Kailāras, nestled in the heart of Madhya Pradesh, India (26.3050°N, 77.6160°E), is a small city of approximately 28,955 residents. The terrain surrounding Kailāras is largely characterised by the undulating plains of the Malwa Plateau, a region known for its black soil and moderate elevation, typically ranging between 400-500 meters above sea level. This plateau landscape influences local wind patterns, often creating stagnant air conditions, particularly during the winter months. The city isn’t directly adjacent to any major bodies of water, though smaller rivers and tributaries meander through the surrounding agricultural lands. Kailāras functions as a regional market town, serving the agricultural communities of the district. The surrounding landscape is dominated by farmland, primarily cultivating wheat, soybeans, and cotton. While not a major industrial hub itself, the city’s proximity to larger industrial areas in nearby districts contributes to regional background pollution levels. The urban-rural gradient is quite sharp; the city centre is relatively compact, quickly transitioning to agricultural fields. This proximity to agricultural practices introduces seasonal dust and potential for biomass burning emissions, impacting local air quality. The city’s location, shielded by the plateau, can also trap pollutants, exacerbating air quality issues.

Kailāras experiences a distinct seasonal air quality pattern. The post-monsoon period (October-November) often sees a deterioration in air quality. The receding monsoon winds are weak, leading to stagnant air and the accumulation of pollutants from agricultural residue burning following the harvest season. November and December bring cooler temperatures and increased frequency of temperature inversions, trapping pollutants near the ground. These months are generally the least favourable for outdoor activity, particularly for those with respiratory conditions. The winter months also see increased reliance on solid fuel for heating, adding to particulate matter levels. The pre-monsoon season (March-May) is characterised by rising temperatures and dust storms, elevating particulate matter concentrations. May, before the arrival of the monsoon, is often the most polluted month. The monsoon season (June-September) provides a temporary respite, as rainfall washes away pollutants and increased humidity suppresses dust. However, increased cloud cover can also contribute to temperature inversions. The period immediately following the monsoon (October) sees a rebound in pollution as agricultural activities resume. Sensitive groups – children, the elderly, and those with pre-existing respiratory or cardiovascular conditions – should take extra precautions during the post-monsoon and pre-monsoon seasons.