Samahuta Air Quality Index (AQI)

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Samahuta, a small town in Bihar, India, sits at coordinates 25.8542°N, 84.6614°E, within the fertile plains of the Ganges River basin. The surrounding landscape is predominantly agricultural, characterized by rice paddies and wheat fields, typical of the Indo-Gangetic Plain. The terrain is remarkably flat, with a very gentle slope towards the Ganges, influencing drainage patterns and potentially contributing to localised humidity. Situated approximately 80km east of Patna, the state capital, Samahuta’s air quality is intrinsically linked to regional pollution sources, including those from Patna’s industrial areas and vehicular emissions. The urban-rural gradient is pronounced; Samahuta itself is a relatively small settlement, but is increasingly connected to larger urban centres. This connectivity brings increased traffic and associated pollutants. The lack of significant topographical features – hills or mountains – means there is little natural dispersion of pollutants, and temperature inversions can easily trap them near ground level. The proximity to agricultural lands also introduces seasonal burning of crop residue, a major contributor to particulate matter. The Ganges River, while a vital water source, doesn’t offer significant air purification benefits in this flat, stagnant airmass. The town’s elevation is low, further exacerbating the potential for pollutant accumulation.

Samahuta experiences a distinct seasonal air quality pattern dictated by the monsoon and post-monsoon periods. The pre-monsoon months (March-May) are typically the worst, with rising temperatures and stagnant air leading to increased concentrations of dust and particulate matter from agricultural activities and road dust. April and May are particularly challenging. The arrival of the monsoon (June-September) brings a temporary respite, as rainfall washes away pollutants and increased humidity suppresses dust. However, the monsoon can also lead to localised flooding, which can disrupt waste management and contribute to waterborne disease, indirectly impacting public health. Post-monsoon (October-November) sees a resurgence of pollution, driven by cooler temperatures, temperature inversions, and the widespread burning of crop residue after the harvest. This period is often marked by hazy conditions and respiratory irritation. Winter (December-February) brings relatively stable atmospheric conditions, trapping pollutants and exacerbating the effects of biomass burning for heating. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during the pre-monsoon and post-monsoon seasons. Monitoring local weather patterns and avoiding peak pollution times is crucial for protecting health.