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Dūrpalli, a small town in the Nalgonda district of Andhra Pradesh, India, sits at coordinates 18.5967°N, 78.4517°E. The terrain is largely characterised by undulating plains typical of the Deccan Plateau, with a gentle slope towards the south. The town’s elevation is relatively low, contributing to limited natural dispersion of pollutants. Dūrpalli is not directly adjacent to a major body of water, though smaller streams and tanks (reservoirs) dot the surrounding landscape, crucial for local agriculture. The region is predominantly agricultural, with paddy cultivation being prominent, alongside cotton and other seasonal crops. While Dūrpalli itself isn’t a major industrial hub, its proximity to larger towns and cities with industrial activity – particularly Hyderabad to the northwest – means it’s susceptible to regional pollution transport. The urban-rural gradient is quite sharp; Dūrpalli represents a relatively rural setting, but is increasingly connected to the economic activity of nearby urban centres. This connection brings increased vehicular traffic and potential for localised emissions. Dust from agricultural practices and unpaved roads also contributes significantly to particulate matter in the air. The surrounding landscape is primarily farmland, interspersed with small patches of scrubland and vegetation, offering limited natural air purification capacity.

Dūrpalli experiences a tropical climate with distinct wet and dry seasons. Air quality generally worsens during the dry season, from November to May. This is due to lower rainfall, reduced humidity, and increased dust suspension from agricultural activities and road traffic. January and February are typically the months with the poorest air quality, as temperature inversions are common, trapping pollutants near the ground. The monsoon season, from June to October, brings significant relief. Heavy rainfall effectively washes away particulate matter, and increased humidity suppresses dust. However, increased cloud cover can also lead to stagnant air conditions during periods of weak monsoon activity. Post-monsoon, in October and November, a slight deterioration in air quality can occur as residual moisture combines with pollutants. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor exposure during the dry season, particularly in January and February. During the monsoon, while air is cleaner, the risk of waterborne diseases increases, so precautions are still necessary. The prevailing winds, generally from the southwest during the monsoon and northeast during the dry season, influence the direction of pollutant transport.