Air pollution for July-September quarter at second lowest in five years in Delhi: Centre for Science and Environment
Delhi’s PM2.5 pollution average for the July-August-September quarter this year stood at 37 micrograms per cubic metre, only marginally higher than the five-year low of 36 micrograms per cubic metre recorded during 2020, according to an analysis by the Centre for Science and Environment. Pollution levels in the July-August-September quarter were preceded by one of the most polluted summers this year, unlike in 2020 when the trimester followed the cleanest ever summer (March-May) due to extraordinary conditions created because of hard pandemic lockdowns, the green think tank said. “Therefore, it is important to understand what aided in cleaning up the Delhi air. Looking at the rainfall data it becomes evident that distribution of rainfall has a relatively higher impact on seasonal air quality than the absolute quantity of rainfall,” it said.
