Sughrāin Air Quality Index (AQI)

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Sughrāin, a small town nestled in the fertile plains of Bihar, India, occupies a geographically significant position within the Gangetic Basin. Located at approximately 25.7460° N, 86.3250° E, the town’s terrain is predominantly flat, characteristic of the Indo-Gangetic Plain, with an elevation of around 61 meters above sea level. This low-lying topography contributes to a tendency for pollutants to accumulate, particularly during periods of atmospheric stability. The surrounding landscape is dominated by agricultural fields – primarily rice and maize cultivation – which, while vital to the regional economy, can contribute to particulate matter through seasonal burning practices. Sughrāin’s proximity to the Ghaghara River, though providing a source of water, also influences local humidity and can impact the dispersion of pollutants. The urban–rural gradient around Sughrāin is gradual; the town itself exhibits a modest urban character with a mix of residential and commercial areas, while the immediate periphery is largely agrarian. Further afield, the region is part of a broader industrial belt centered around larger cities like Patna, though Sughrāin itself lacks significant heavy industry. However, transportation corridors connecting these industrial hubs pass nearby, contributing to vehicular emissions. The flat, expansive nature of the plain, combined with limited natural barriers, means that air pollution originating from distant sources can readily impact Sughrāin’s air quality, making it susceptible to regional pollution events. The climate, characterized by hot summers and a distinct monsoon season, further complicates atmospheric dynamics and pollutant dispersal.

Sughrāin’s air quality follows a distinct seasonal pattern dictated by its subtropical monsoon climate. The pre-monsoon months (March-May) typically experience the poorest air quality. High temperatures and low wind speeds create atmospheric stability, fostering temperature inversions that trap pollutants near the ground. Agricultural burning, a common practice to clear fields for the planting season, significantly elevates particulate matter concentrations during this period. The monsoon season (June-September) brings relief as increased rainfall and stronger winds effectively flush out pollutants, leading to a noticeable improvement in air quality. However, heavy rainfall can also lead to localized flooding, potentially releasing pollutants from stagnant water sources. Post-monsoon (October-November) sees a gradual return to less favourable conditions. As temperatures drop and wind speeds decrease, a period of calm sets in, allowing pollutants to accumulate. Fog, common during these months, further exacerbates the problem by trapping particulate matter and reducing visibility. Winter (December-February) is generally the coolest and driest period, with air quality fluctuating depending on the frequency of fog and temperature inversions. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the pre-monsoon and post-monsoon seasons, limiting outdoor activity during peak pollution episodes. Maintaining indoor air quality through ventilation and air purification can also be beneficial. Public health advisories are often issued during periods of elevated pollution, urging residents to take preventative measures.