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Pirthīpur, nestled within the heart of Madhya Pradesh, India, at coordinates 25.1853°N, 78.6650°E, presents a fascinating case study in rural-urban air quality dynamics. The city’s terrain is largely flat, characteristic of the Malwa Plateau, with a gentle slope towards the north. This relatively low elevation contributes to potential temperature inversions, trapping pollutants near the ground. Pirthīpur’s population of approximately 42,883 suggests a developing urban centre, transitioning from a predominantly agricultural landscape. Surrounding the city are extensive agricultural lands, primarily cultivating wheat, soybean, and cotton, with associated seasonal burning of crop residue being a significant factor. While no major industrial belts directly abut Pirthīpur, regional industrial activity in nearby districts contributes to background pollution levels. The Betwa River flows some distance to the north, offering limited influence on local air circulation patterns. The urban-rural gradient is pronounced; air quality deteriorates noticeably closer to the city centre due to vehicular emissions, dust from unpaved roads, and localized biomass burning for cooking and heating. Understanding this interplay between agricultural practices, developing urban infrastructure, and regional influences is crucial for effective air quality management in Pirthīpur.

Pirthīpur experiences a distinct seasonal air quality pattern dictated by the monsoon and post-monsoon periods. The summer months (March-May) see rising temperatures and dry conditions, exacerbating dust pollution from construction and agricultural activities. Hot, dry winds can carry pollutants from surrounding regions, leading to poorer air quality. The arrival of the monsoon in late June/early July brings temporary relief, as rainfall washes away particulate matter and increased humidity suppresses dust. However, stagnant air during periods of weak monsoon activity can trap pollutants. Post-monsoon (October-November) is often the worst period, coinciding with the burning of crop residue after the harvest. This practice releases significant amounts of particulate matter and other pollutants, creating a haze that lingers due to cooler temperatures and stable atmospheric conditions. Winter (December-February) sees cooler temperatures and potential for temperature inversions, trapping pollutants near the ground. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during October-November and periods of stagnant air in winter. Avoiding peak hours for commuting and using respiratory masks can offer some protection.