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Arugollu, a small town in Andhra Pradesh, India, sits at coordinates 16.8253°N, 81.5775°E, within the Krishna River delta region. The terrain is predominantly flat, characteristic of the fertile alluvial plains formed by the river’s deposition. This low-lying landscape, with an elevation barely above sea level, significantly influences local air quality. Arugollu is surrounded by intensely cultivated agricultural land, primarily paddy fields, and increasingly, commercial crops. The proximity to the Krishna River provides irrigation but also contributes to humidity, potentially trapping pollutants. While not a major industrial hub itself, Arugollu functions as a market town for surrounding agricultural produce, leading to increased vehicular traffic and dust from transport. The urban-rural gradient is sharp; immediately surrounding the town are rural villages engaged in farming. This creates a complex pollution dynamic – agricultural practices contribute to ammonia and particulate matter, while transport links introduce emissions from vehicles. The lack of significant topographical features hinders natural dispersion of pollutants, making Arugollu susceptible to localised air quality issues, particularly during calmer weather conditions. The delta’s flat geography means pollutants aren’t readily flushed out by wind or elevation changes.

Arugollu experiences a tropical climate with distinct wet and dry seasons. Air quality generally worsens during the dry season (October to May), peaking in March and April. This is due to lower rainfall, increased dust from agricultural activities – harvesting and land preparation – and temperature inversions trapping pollutants near the ground. The lack of monsoon winds during this period further exacerbates the situation. The southwest monsoon (June to September) brings significant relief, washing away pollutants and improving air quality. However, increased humidity can also foster fungal growth, potentially impacting respiratory health. Post-monsoon (October-November) sees a transitional period with moderate pollution levels. Fog formation during cooler mornings in winter can trap pollutants, leading to localised poor air quality. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during the dry season, particularly in March and April. During the monsoon, while air is cleaner, precautions should be taken to avoid waterborne diseases. Maintaining good ventilation indoors and using air purifiers can offer some protection year-round, but are especially important during peak pollution periods.