Nallamada Air Quality Index (AQI)

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Nallamada, nestled in the Kadapa district of Andhra Pradesh, India, occupies a geographically significant position within the Deccan Plateau. Located at approximately 14.2164° N latitude and 77.9944° E longitude, the town’s elevation of around 350 meters above sea level contributes to a relatively stable atmospheric layer, which can, at times, exacerbate pollution accumulation. The surrounding landscape is characterized by undulating hills and rocky terrain, typical of the region's ancient geological formations. While not directly adjacent to a major river, Nallamada benefits from proximity to the Pennar River basin, influencing local humidity and rainfall patterns. The urban character is primarily rural, with Nallamada serving as a small market town catering to the agricultural communities in the surrounding area. The dominant land use is agricultural, with crops like groundnut, maize, and pulses being cultivated. This agricultural activity, while vital to the local economy, can contribute to particulate matter pollution through practices like crop residue burning, particularly during post-harvest seasons. The urban–rural gradient is gradual, with small villages and agricultural fields seamlessly blending into the town's periphery. Further afield, the industrial belt of Kurnool, approximately 80 kilometers to the west, introduces a potential source of industrial pollutants that can be transported by prevailing winds. The town's location within a relatively enclosed valley can also limit atmospheric dispersion, especially during periods of low wind speed, leading to localized air quality challenges.

Nallamada experiences a distinct tropical wet and dry climate, significantly impacting its air quality throughout the year. The dry season, typically spanning from March to May, is characterized by high temperatures and minimal rainfall. This period often witnesses a noticeable increase in particulate matter pollution, primarily due to increased dust from agricultural activities, road construction, and the prevalence of crop residue burning following the harvest season. Temperature inversions, common during these months, trap pollutants near the ground, further worsening air quality. The monsoon season, from June to September, brings relief with frequent rainfall, effectively washing away pollutants and significantly improving air quality. However, heavy rainfall can also lead to increased humidity and the release of biogenic volatile organic compounds (BVOCs) from vegetation. The post-monsoon season (October-November) sees a gradual decrease in rainfall and a return of drier conditions, with a corresponding rise in pollution levels. December and January are comparatively cooler and often experience periods of fog, which can trap pollutants and reduce visibility. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season and periods of fog, limiting outdoor exertion and wearing appropriate masks. Outdoor activities are generally more favourable during the monsoon season and the cooler months of December and January, although vigilance regarding pollen counts during the post-monsoon period is advisable.