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Mehidpur, nestled in the heart of Madhya Pradesh, India, at coordinates 23.4888°N, 75.6580°E, occupies a relatively flat terrain typical of the Malwa Plateau. The city’s elevation is modest, contributing to limited natural dispersion of pollutants. Its location isn’t directly adjacent to major bodies of water, though smaller rivers and tributaries meander through the surrounding agricultural landscape. This landscape is predominantly rural, characterized by intensive farming, particularly wheat, soybean, and cotton cultivation. The urban-rural gradient is quite sharp; Mehidpur itself is a relatively small urban center surrounded by extensive agricultural lands. While not a major industrial hub, the presence of small-scale industries – primarily related to agricultural processing and textiles – contributes to localized emissions. The region experiences a distinct monsoon season, and dust from agricultural activities is a significant factor. The city’s position within a broader network of smaller towns means it acts as a regional market and transport node, increasing vehicular traffic. This combination of factors – agricultural practices, small industries, transport, and limited topographical features for dispersion – creates a specific set of challenges for maintaining good air quality in Mehidpur. The surrounding areas are also prone to seasonal biomass burning, further impacting air quality.

Mehidpur’s air quality follows a predictable seasonal pattern. The post-monsoon period, from October to November, often sees a deterioration in air quality due to stagnant air and the practice of crop residue burning following the harvest. Cooler temperatures during these months can also lead to temperature inversions, trapping pollutants near the ground. December and January represent the coolest months, with generally better air quality due to increased wind speeds, but particulate matter from household heating (wood and dung) remains a concern. The pre-monsoon months, March to May, are typically the worst for air quality. Rising temperatures and dry conditions exacerbate dust from agricultural lands and construction activities. The onset of the monsoon in June brings a significant improvement, as rainfall washes away pollutants and increased humidity suppresses dust. However, increased cloud cover can also lead to reduced sunlight, potentially increasing ground-level ozone formation. August and September maintain relatively clean air, though localized flooding can sometimes disrupt waste management, leading to temporary pollution spikes. Sensitive groups – children, the elderly, and those with respiratory conditions – should be particularly cautious during the pre-monsoon and post-monsoon seasons, limiting outdoor activity and using appropriate respiratory protection.