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Rāhon, a small town nestled in the fertile plains of Punjab, India, occupies a geographically significant position within the broader Indo-Gangetic Plain. Located at approximately 31.0527° N, 76.1191° E, Rāhon’s terrain is predominantly flat, characteristic of the alluvial soil deposited over millennia by the Indus River and its tributaries. The elevation is relatively low, contributing to atmospheric stability and potential for pollutant accumulation. The surrounding landscape is overwhelmingly agricultural, a patchwork of cultivated fields primarily dedicated to wheat and rice cultivation – a major source of seasonal agricultural burning. Rāhon sits within a gradual urban–rural gradient, transitioning from the denser urban sprawl of nearby Ludhiana to the quieter agricultural hinterland. While Rāhon itself is a small urban centre, its proximity to Ludhiana, a significant industrial hub, exposes it to pollutants transported by prevailing winds. The lack of significant natural barriers, such as hills or mountains, allows for the unimpeded movement of air masses, facilitating both the dispersal and concentration of pollutants. The absence of major water bodies within immediate proximity further limits the natural cleansing effect of humidity and precipitation. The region's climate, characterized by hot summers and cool winters, influences atmospheric mixing and stability, impacting the dispersion of emissions from agricultural practices, vehicular traffic, and industrial sources in Ludhiana. The flat topography and agricultural dominance create a unique vulnerability to air quality challenges.

Rāhon’s air quality follows a distinct seasonal pattern dictated by meteorological conditions and agricultural practices. The winter months (November to February) are typically the most challenging. Cold temperatures lead to frequent temperature inversions, trapping pollutants close to the ground. Dense fog, a common occurrence during this period, further exacerbates the problem by reducing visibility and hindering pollutant dispersion. Agricultural burning, a widespread practice to clear crop residue after the harvest of rice and wheat, releases significant quantities of particulate matter and other harmful gases, dramatically worsening air quality. Spring (March-May) sees a gradual improvement as temperatures rise, promoting atmospheric mixing and diluting pollutants. However, dust storms originating from the Thar Desert can occasionally impact air quality. The monsoon season (June-September) brings relief with increased rainfall, which helps to wash away pollutants and improve air quality. However, heavy rainfall can also lead to waterlogging and the release of methane from flooded fields. The monsoon winds also influence the transport of pollutants from other regions. Finally, the summer months (October) are generally characterized by relatively clear skies and moderate temperatures, although dust from construction activities and vehicular emissions can still contribute to localized pollution. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the winter months and avoid prolonged outdoor exposure when air quality is visibly poor. Staying indoors with air purifiers and wearing masks can offer some protection.