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Mansehra, nestled in the Khyber Pakhtunkhwa province of Pakistan, occupies a strategically important location within the broader Himalayan foothills. Situated at approximately 34.33°N, 73.20°E and an elevation of around 1,300 meters (4,265 feet), the city’s geography is dominated by rugged terrain and steep slopes, characteristic of the mountainous region. The surrounding landscape is a tapestry of dense coniferous forests, terraced agricultural fields, and the swift-flowing Kunhar River, which carves its way through the valley. Mansehra serves as a vital transport hub, connecting the northern areas of Pakistan with the rest of the country, contributing to its urban character as a commercial and transit point. The urban–rural gradient is sharp; the city itself is relatively compact, transitioning quickly into agricultural lands and then into the wilder, forested mountains. While not directly adjacent to major industrial belts, Mansehra’s proximity to agricultural zones means seasonal burning of crop residue can contribute to localized air pollution. The valley’s topography, with its enclosed nature, can exacerbate pollution events by trapping pollutants, particularly during periods of low wind. The surrounding mountains act as a barrier, limiting air circulation and potentially concentrating emissions from both local sources and those carried in from further afield. The Kunhar River, while providing a water source, also influences local microclimates and humidity levels, which can impact pollutant dispersion.

Mansehra’s air quality experiences a distinct seasonal cycle heavily influenced by its climate and regional weather patterns. The winter months (November to February) are typically characterized by colder temperatures and frequent fog, a consequence of the valley’s topography and moisture content. This fog, combined with temperature inversions – where a layer of warm air traps cooler air near the ground – significantly reduces vertical mixing, leading to a build-up of pollutants. Agricultural burning, a common practice for clearing fields after the harvest, further contributes to particulate matter during this period. Spring (March to May) brings warmer temperatures and increased wind speeds, generally improving air quality as pollutants are dispersed. However, dust storms originating from the plains to the south can occasionally impact the city. The monsoon season (June to September) introduces higher humidity and rainfall, which helps to cleanse the atmosphere, reducing pollutant concentrations. However, heavy rainfall can also lead to flooding and the release of pollutants from waterlogged areas. Autumn (October) sees a gradual cooling and a return to conditions conducive to fog formation, mirroring the winter pattern. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the winter months, limiting outdoor activity on foggy days and avoiding areas with visible smoke. During the monsoon, while overall air quality improves, be mindful of potential waterborne illnesses related to flooding.