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Pāonta Sāhib, nestled in the foothills of the Shivalik range in Himachal Pradesh, India, occupies a geographically significant position within the broader Indo-Gangetic Plain. Located at approximately 30.4380° N, 77.6240° E and an elevation of around 427 meters (1401 feet), the town’s terrain is characterized by undulating hills and valleys, typical of the lower Himalayan region. The surrounding landscape is a mosaic of agricultural fields – primarily cultivating wheat, maize, and vegetables – interspersed with pockets of dense deciduous forests. This agricultural activity, while vital to the local economy, contributes to seasonal particulate matter. Pāonta Sāhib’s proximity to the Yamuna River, though not directly adjacent, influences regional weather patterns and can impact the dispersion of pollutants. The town’s urban character is evolving; it began as a small trading post but has experienced rapid industrial growth, particularly in the pharmaceutical and manufacturing sectors, creating an urban–rural gradient. This industrial belt, concentrated along the national highway, is a key factor influencing local air quality. The town’s location within the Himalayan foothills means it’s susceptible to topographic effects, such as cold air pooling during winter months, which can exacerbate pollution. The surrounding rural areas act as a buffer, but increased vehicular traffic and industrial emissions are steadily impacting the air quality, demanding careful monitoring and mitigation strategies. The valley setting limits atmospheric mixing, further compounding the issue.

Pāonta Sāhib’s air quality exhibits a distinct seasonal pattern dictated by the interplay of meteorological factors and local activities. The winter months (November to February) typically see the poorest air quality. Cold temperatures lead to temperature inversions, trapping pollutants near the ground and hindering dispersion. Frequent fog, a common occurrence during this period, further reduces visibility and concentrates particulate matter. Agricultural burning, a practice used to clear fields after harvest, significantly contributes to pollution spikes in late autumn and early winter. Spring (March to May) brings a gradual improvement as temperatures rise, and winds increase, aiding in pollutant dispersal. However, dust storms originating from the Thar Desert can occasionally impact air quality. The monsoon season (June to September) offers a period of relative respite. Rainfall effectively washes away pollutants, and increased wind speeds promote ventilation. However, heavy rainfall can also lead to waterlogging and the release of methane from agricultural lands. The post-monsoon period (October) often sees a return to poorer air quality as conditions become more stable and agricultural burning resumes. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during winter months and be mindful of dust storm advisories in spring. Outdoor activities are generally more favourable during the monsoon season, but vigilance is still advised, particularly near industrial areas. Maintaining indoor air quality through ventilation and air purifiers is recommended during periods of elevated pollution.