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Rājpura, nestled within the fertile plains of Punjab, India, occupies a geographically significant position at 30.4840°N, 76.5940°E. The city’s terrain is largely flat, characteristic of the Indo-Gangetic Plain, with a gentle slope towards the south. This flatness contributes to the potential for stagnant air masses, impacting air quality. Rājpura’s elevation is relatively low, around 250-260 meters above sea level, further reducing atmospheric dispersion. The Sutlej River flows nearby, influencing local humidity and occasionally contributing to fog formation, a key factor in winter pollution episodes. Surrounding Rājpura is a predominantly agricultural landscape, intensely cultivated with wheat, rice, and sugarcane. This agricultural activity, while vital to the regional economy, introduces particulate matter from crop residue burning, especially after the harvest seasons. The city is also experiencing increasing industrial development, particularly in the small-scale manufacturing sector, adding to the emission sources. The urban-rural gradient is relatively sharp, with agricultural lands immediately bordering the city limits. This proximity means pollutants generated within Rājpura can quickly affect surrounding rural areas, and vice versa. The city’s location within the Indo-Gangetic Plain, a known hotspot for air pollution, exacerbates these challenges.

Rājpura’s air quality follows a distinct seasonal pattern. The post-monsoon period, from October to November, sees a significant deterioration in air quality. The burning of crop residue from the rice harvest, combined with cooler temperatures and calm winds, creates a hazardous pollution cocktail. November is typically the most challenging month. Winter, from December to February, brings frequent temperature inversions, trapping pollutants near the ground and intensifying smog. Dense fog further reduces visibility and exacerbates respiratory issues. March and April offer a brief respite as temperatures rise and winds pick up, dispersing pollutants. However, dust storms originating from the western deserts can temporarily worsen conditions. The monsoon season, from July to September, generally provides the cleanest air due to rainfall washing away pollutants and increased wind speeds. However, increased humidity can also promote the formation of secondary pollutants. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during October-November and December-February. Staying indoors during peak pollution hours and using air purifiers are recommended. Avoiding strenuous exercise outdoors during these periods is also crucial.