Rengāli Air Quality Index (AQI)

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Rengāli, a small town in Odisha, India, is situated at coordinates 21.6460°N, 84.0531°E, nestled within the eastern coastal plains. The terrain is predominantly flat, characteristic of the Mahanadi River delta region, with an elevation hovering around a modest 35 meters above sea level. This low-lying geography contributes to limited natural dispersion of pollutants. Rengāli’s location places it within a largely agricultural zone, primarily rice cultivation, with smaller pockets of inland fisheries. The town benefits from proximity to the Bay of Bengal, approximately 60 kilometers east, influencing humidity and seasonal weather patterns. However, this coastal proximity doesn’t guarantee strong sea breezes for pollutant removal, as local topography can channel winds. The surrounding landscape is a mix of agricultural fields, small forested patches, and rural settlements. The urban-rural gradient is quite sharp; Rengāli itself is a relatively small urban centre surrounded by a predominantly agrarian hinterland. Industrial activity is limited within Rengāli itself, but regional industrial belts further north along the coast and in Angul district can contribute to long-range transport of pollutants, impacting local air quality, particularly during periods of stagnant air. The town’s position within the monsoon belt also plays a crucial role in air quality dynamics.

Rengāli experiences a distinct wet and dry season, heavily influenced by the Indian monsoon. Air quality generally improves significantly during the monsoon months (June to September) due to rainfall effectively scavenging particulate matter from the atmosphere. However, high humidity can also foster mould growth, impacting respiratory health. The post-monsoon period (October-November) sees a gradual deterioration in air quality as temperatures drop and wind speeds decrease, creating conditions for temperature inversions that trap pollutants near the ground. This is often a period of agricultural burning, adding to particulate matter concentrations. The dry season (December to April) presents the most challenging air quality conditions. Low wind speeds, coupled with higher temperatures, exacerbate pollution build-up. January and February are typically the worst months, with dust from agricultural activities and potential regional industrial emissions contributing to poor air quality. During these months, sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity. The pre-monsoon season (May-June) sees rising temperatures and dust storms, further degrading air quality before the cleansing rains arrive. Consistent monitoring and public health advisories are crucial during these periods.