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Kittanapalli, nestled in the Dharmapuri district of Tamil Nadu, India (12.5133° N, 78.1844° E), occupies a geographically significant position within the broader Kaveri River basin. The town’s terrain is characterized by gently undulating plains, typical of the Deccan Plateau, with elevations rarely exceeding 600 meters above sea level. This relatively low elevation, combined with its inland location, influences local air circulation patterns. Kittanapalli is surrounded by a mosaic of agricultural land, primarily dedicated to crops like paddy, sugarcane, and pulses, contributing to potential biogenic volatile organic compound (BVOC) emissions, particularly during the monsoon season. To the west, the landscape gradually transitions into more rugged terrain, hinting at the Western Ghats further afield. The town’s proximity to the Kaveri River, though not directly adjacent, provides a degree of humidity and influences local weather patterns. The urban–rural gradient around Kittanapalli is relatively sharp; the town itself is compact, with surrounding villages maintaining a predominantly agrarian character. While not situated within a major industrial belt, Dharmapuri district does host some small-scale industries, including textile units and agricultural processing facilities, which can contribute localized pollution. The prevailing winds, generally from the southwest during the monsoon and shifting to the northeast during the dry season, play a crucial role in dispersing or concentrating pollutants within the region. The relatively flat topography limits vertical mixing, potentially exacerbating ground-level pollution episodes.

Kittanapalli’s air quality follows a distinct seasonal pattern dictated by the region’s tropical climate and the influence of the Indian monsoon. The dry season, spanning roughly from March to May, often witnesses a gradual increase in particulate matter concentrations. This is due to reduced rainfall, leading to less atmospheric cleansing, coupled with increased dust from agricultural activities like plowing and harvesting. Temperature inversions, common during these months, trap pollutants near the ground, worsening air quality. The monsoon season, from June to September, brings significant relief as heavy rainfall washes away pollutants and strong winds disperse them. However, the monsoon also introduces its own challenges; increased humidity can exacerbate respiratory issues, and agricultural burning, though regulated, can still contribute to localized smoke events. October and November mark a transitional period, with decreasing rainfall and gradually rising temperatures, potentially leading to a resurgence of particulate matter. December and January are generally cooler and drier, with relatively better air quality compared to the pre-monsoon period. Sensitive groups, including children, the elderly, and individuals with pre-existing respiratory conditions, should exercise caution during the dry season (March-May) and be mindful of potential agricultural burning in October/November. Outdoor activities are generally more favorable during the monsoon months (June-September) and the cooler winter months (December-January), although humidity should be considered.