With increasing population, urbanization, and industrialization, air pollution is emerging as a significant problem. According to WHO (World Health Organization), around 90% of people worldwide breathe polluted air. Further, a study published in The Lancet Journal of Planetary Health states that poor air quality is also the cause of around 1.24 million premature deaths in India. Vehicular pollution, road dust, construction, industrial pollution are some of the major sources responsible for air pollution. Maintaining good air quality is already a major challenge for authorities. As a step towards awareness and maintaining air-quality levels within permissible limits, many countries have developed the Air Quality Index (AQI). On 17th September 2014, the Government of India announced the Air Quality Index of India.
AQI provides a good understanding of the overall air pollution scenario. But to calculate AQI, it is necessary to measure the concentration of various air-quality parameters such as PM2.5, PM10, CO, NO2, SO2, O3, NH3, etc. Air quality monitoring is also important to understand the Spatio-temporal variation of various pollutants. As the saying goes – “you cannot manage, what you cannot measure”, air quality monitoring is the first step in understanding the global issue and an inevitable step in developing mitigation strategies.