Articles by Dr. Sarath Guttikunda

The National Clean Air Programme (NCAP) was announced in 2018 and the draft was accepted in 2019. The programme is designed to build institutional capacity and initiate studies to better understand the pollution load in cities.  122 cities from 20 states and 3 union territories were declared “non-attainment” cities, based on the observed particulate matter pollution trends from the national ambient monitoring program (NAMP).  These cities were required to submit action plans outlining how to achieve 20-30% reduction in the ambient PM 2.5 levels by 2024, when compared to 2017. As of May 2020, there are 102 approved action plans.…

During a question and answer session in Delhi late last year, I was asked this question “Since Diwali, the Delhi government has installed 20 continuous monitoring stations. Despite that, why are the pollution levels still so high?” The simple answer to this is that monitoring is a diagnostic tool to assess levels of air pollution and in itself does not reduce any air pollution. What it does do, is provide a starting point for understanding the air pollution problem and a direction for addressing pollution control options. This however got me thinking. Having worked on air pollution-related research over my entire…

For an effective air quality management plan, a lot of information is required at various stages to ascertain the sources, their impacts on health, and their potential to control emissions. However, the most basic information that every city requires is ambient monitoring data. This data tells us, what is the level of air pollution, where and when is it the highest (spatial and temporal trends). It is very important that the ambient monitoring network for a city is representative, spatially and temporally, to support an effective long-term air quality management plan for the entire airshed of the city. For example,…