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Rajahmundry, situated at 17.0005°N, 81.8040°E in Andhra Pradesh's East Godavari district, occupies a strategic position on the left bank of the Godavari River, India's second-longest river, which profoundly shapes its geography and air quality dynamics. The city lies within the fertile Godavari delta, a vast agricultural zone where rice paddies and sugarcane fields dominate the landscape, contributing to seasonal pollution through stubble burning. With an elevation of just 14 meters above sea level, Rajahmundry's low-lying terrain and proximity to the Bay of Bengal, approximately 60 kilometers east, create a humid environment that traps pollutants near the surface. The urban area blends into surrounding rural villages, creating a distinct urban-rural gradient where industrial emissions from paper mills like Andhra Paper and JK Paper mingle with agricultural and vehicular sources. This industrial belt along the riverfront, combined with ongoing construction and traditional brick kilns, generates persistent particulate matter. The city's location in South Asia's tropical wet-and-dry zone means it experiences distinct wet and dry seasons, with the Godavari River acting as both a moisture source and a corridor for pollutant dispersion—or stagnation, depending on wind patterns. The surrounding Eastern Ghats to the west provide some topographic shelter but can also contribute to temperature inversions during cooler months, exacerbating pollution episodes in this riverine settlement.

Rajahmundry's air quality follows a pronounced seasonal rhythm dictated by its tropical wet-and-dry climate and local emission patterns. From June to September, the southwest monsoon brings heavy rainfall that scrubs pollutants from the atmosphere, resulting in the cleanest air of the year—ideal for outdoor activities like riverfront walks or visits to the Godavari bridges. However, this period also carries cyclone risks from the Bay of Bengal, which can temporarily worsen air quality through storm-driven dust. As the monsoon retreats in October, pollution begins to accumulate, peaking from November through February during the dry winter months. During this peak, calm winds, frequent fog, and temperature inversions trap emissions from paper mills, agricultural stubble burning in the Godavari delta, vehicle exhaust, and construction dust, creating hazardous haze. Sensitive groups—children, elderly, and those with respiratory conditions—should limit outdoor exposure, especially in early mornings when inversions are strongest. March to May brings extreme heat, with temperatures often exceeding 40°C, which increases ozone formation from vehicle emissions, though stronger daytime breezes provide some dispersion. To minimize health risks, residents should monitor local air quality advisories, use air purifiers indoors during peak months, and schedule outdoor exercise for late mornings after fog dissipates or during the monsoon respite.