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Gudūr is situated in the Nellore district of Andhra Pradesh, nestled within the fertile coastal plains that characterize the southeastern corridor of India. The town serves as a critical node along the National Highway 16, which facilitates heavy vehicular movement between Chennai and Kolkata, contributing significantly to the local air quality profile through constant exhaust emissions. Geographically, the terrain is predominantly flat and alluvial, lacking significant topographic barriers that would otherwise trap pollutants, though its low elevation makes it susceptible to humidity-driven stagnation. The town is renowned for its jute industry, with large markets and processing units that introduce organic particulate matter and dust into the immediate atmosphere. Surrounding the urban core is a vast agricultural landscape dominated by paddy and sugarcane cultivation, creating a sharp urban-rural gradient where the air quality fluctuates based on seasonal farming practices. The proximity to the Bay of Bengal, though not coastal, ensures a general maritime influence that provides occasional ventilating breezes, mitigating the accumulation of smog. However, the intersection of industrial activities from the nearby Nellore belt and the concentrated traffic on the highway creates a localized pollution corridor. This combination of flat topography and high transit volume means that pollutants often drift across the landscape, influenced by the prevailing winds of the Coromandel Coast, linking the town's air quality directly to regional industrial outputs and agricultural cycles. The result is an urban environment where air quality is a hybrid of transit-related smog and rural organic dust.

Gudūr experiences a tropical climate where air quality is dictated by the rhythmic arrival of the monsoons. During the scorching summer months, from March to May, high temperatures and low humidity lead to an increase in suspended particulate matter and wind-blown dust from the surrounding arid agricultural lands. The air often feels heavy, and ground-level ozone can peak due to intense solar radiation reacting with vehicular emissions from the highway. The arrival of the Southwest Monsoon between June and September brings a dramatic improvement; heavy rainfall effectively scrubs the atmosphere, washing away pollutants and significantly lowering the concentration of particulate matter. This is the cleanest period for the town, making it ideal for outdoor activities. However, as the region transitions into the post-monsoon and early winter phase from October to January, the air quality often degrades. Cooler temperatures lead to shallow mixing layers and occasional temperature inversions, which trap pollutants closer to the ground. This period coincides with agricultural residue burning in the neighboring fields, adding a layer of smoke to the urban air. For sensitive groups, including children and the elderly, the winter months are the most challenging, requiring caution during early morning fog when pollutants are most concentrated. By February, as the weather warms, the stagnation lifts, though dust levels begin to climb again. Residents are advised to monitor local conditions during the winter haze to avoid respiratory distress and minimize exposure to smog.