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Rewa, situated in northeastern Madhya Pradesh at coordinates 24.5300°N, 81.3000°E, occupies a distinctive position within India's Vindhya Range foothills, approximately 300 meters above sea level. This elevation creates a natural basin-like topography where the city nestles, surrounded by undulating hills that trap atmospheric pollutants, particularly during cooler months. The region forms part of the agriculturally intensive Rewa Plateau, characterized by fertile alluvial soils that support extensive crop cultivation, including wheat, pulses, and oilseeds, contributing to seasonal agricultural burning. Rewa's urban character blends historic administrative functions with emerging industrial activity, notably cement production, which, combined with its role as a regional transport hub, intensifies local emissions. The city lies near the Tamsa River, a tributary of the Ganges, but this proximity offers limited air-cleansing effects due to the river's seasonal flow patterns. Positioned along National Highway 7, Rewa experiences significant vehicular traffic linking it to major centers like Allahabad and Jabalpur, exacerbating road dust and exhaust pollution. The urban-rural gradient is pronounced, with the city core transitioning rapidly to agricultural hinterlands, where domestic biomass burning for cooking and heating is prevalent. This geographic setting, compounded by industrial emissions from local cement plants and the region's bowl-like terrain, creates a persistent air quality challenge, particularly when meteorological conditions inhibit pollutant dispersion.

Rewa's air quality follows a distinct seasonal pattern driven by its tropical wet-and-dry climate and local emission sources. During the winter months from November to February, pollution peaks dramatically due to a combination of factors: lower temperatures foster temperature inversions that trap pollutants near the surface, while calm winds and frequent fog episodes further impede dispersion. This period coincides with post-harvest agricultural burning in surrounding farmlands and increased domestic biomass burning for heating, compounding emissions from cement plants and vehicles. Sensitive groups, including children, the elderly, and those with respiratory conditions, should minimize outdoor activities during these months, especially in early mornings when inversion layers are strongest. The pre-monsoon summer from March to May brings extreme heat, which can elevate ground-level ozone formation, though stronger daytime winds and convective activity provide some pollutant mixing, offering slightly better conditions for outdoor exertion in cooler hours. The monsoon season from June to September delivers substantial rainfall that scrubs particulate matter from the air, resulting in the year's cleanest air; however, high humidity and thunderstorms pose other weather hazards. Post-monsoon October sees a gradual return of stagnant conditions as temperatures drop and agricultural fires begin, marking the transition back to peak pollution. For health protection, residents are advised to monitor local air quality reports, use air purifiers indoors during winter, and schedule outdoor activities for late mornings or afternoons when inversion effects weaken.