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Chandwā, nestled in the heart of Jharkhand, India, occupies a geographically significant position within the Chota Nagpur Plateau. Located at approximately 23.6756° N latitude and 84.7401° E longitude, the town sits at an elevation of roughly 330 meters (1083 feet) above sea level. The surrounding landscape is characterized by undulating hills and plateaus, typical of the region's Precambrian terrain, composed primarily of granite and basalt. This topography influences local wind patterns, often creating stagnant air conditions, particularly during calmer periods. While not directly adjacent to a major river, Chandwā benefits from proximity to smaller streams and seasonal tributaries that drain the plateau, contributing to localized humidity. The urban character is that of a small, developing town, primarily serving as a local market and administrative center for the surrounding agricultural areas. The dominant land use is a mix of residential, commercial, and agricultural, with fields of rice, maize, and pulses extending outwards. The urban–rural gradient is relatively sharp, with agricultural activities quickly dominating the landscape beyond the town limits. Significant industrial activity is limited within Chandwā itself, though the broader region experiences some mining and related industries, potentially contributing to regional air pollution transported by prevailing winds. The plateau's geology and the surrounding agricultural practices, combined with the town’s limited urban planning, create a setting where localized pollution sources can accumulate, impacting air quality.

Chandwā’s air quality follows a distinct seasonal pattern dictated by the region’s tropical monsoon climate. The dry season, spanning roughly October to May, is typically characterized by lower rainfall and increased dust levels. November and December often experience periods of dense fog, trapping pollutants near the ground and exacerbating respiratory issues. Temperature inversions, common during these months, further contribute to poor air quality by preventing vertical mixing of the atmosphere. The peak pollution period generally occurs in January and February, when agricultural burning is prevalent as farmers prepare fields for the spring planting season. The onset of the monsoon season (June to September) brings a significant improvement in air quality due to increased rainfall, which washes pollutants from the atmosphere, and stronger winds that disperse them. However, the monsoon can also introduce moisture and humidity, which can aggravate respiratory conditions for some individuals. The transitional months of March-May see a gradual increase in temperature and dust levels as the monsoon recedes, leading to a slow deterioration in air quality. Sensitive groups, including children, the elderly, and individuals with pre-existing respiratory conditions, should exercise caution during the dry, foggy months (November-February) and be mindful of agricultural burning. Outdoor activities are generally more favorable during the monsoon season, although humidity can still be a factor. Maintaining indoor air quality through ventilation and air purification can be beneficial during periods of elevated pollution.