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Gundrājukuppam, a coastal town in the Chittoor district of Andhra Pradesh, India, occupies a relatively flat terrain at approximately 18 meters above sea level. Its location at 13.3406°N, 79.5687°E places it close to the Bay of Bengal, influencing its climate and, consequently, its air quality. The town is situated within the broader Coromandel Coast plain, characterized by alluvial soils and a dense network of irrigation canals supporting significant agricultural activity, primarily rice cultivation and horticulture. This agricultural landscape, while vital for the local economy, contributes to seasonal biomass burning, impacting air quality. Gundrājukuppam isn’t a major industrial hub itself, but its proximity to industrial areas further inland, particularly around Sri City Special Economic Zone, means it can experience transboundary pollution. The urban-rural gradient is pronounced; the town centre is relatively densely populated, while the surrounding areas are dominated by agricultural land and scattered rural settlements. Sea breezes offer some dispersion, but during calmer periods, pollutants can accumulate, especially near roadways and local brick kilns. The coastal location also means a higher degree of humidity, potentially exacerbating the effects of certain pollutants. Understanding this interplay of geography and activity is crucial for addressing air quality concerns.

Gundrājukuppam experiences a tropical climate with distinct wet and dry seasons. Air quality generally worsens during the dry season, from November to May, due to reduced rainfall and increased dust suspension from agricultural lands and unpaved roads. January to March are typically the driest months, with stagnant air masses leading to pollutant build-up. Temperature inversions, common during cooler mornings in these months, trap pollutants near the ground. The monsoon season, from June to October, brings significant rainfall, effectively washing away many pollutants and improving air quality. However, increased humidity can also promote the formation of secondary pollutants. Post-monsoon, in November, a slight deterioration can occur due to residual moisture and calmer winds. Biomass burning from agricultural residue disposal after the harvest season, particularly in November and December, is a significant contributor to particulate matter. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during the dry season and periods of agricultural burning. Monitoring wind patterns is key; onshore breezes offer some relief, while offshore winds can concentrate pollutants. Avoiding peak hours near roadways is also advisable.