Average levels of pollutants in 2020 lowest in 7 yrs: Delhi Economic Survey

Average levels of various pollutants, including PM10, PM2.5 and nitrogen dioxide, in Delhi last year were the lowest since 2014, according to the Delhi Economic Survey report.

Government data also showed that average levels of the major pollutants in the city have been decreasing steadily over the years.

The annual average concentrations of PM2.5, fine particulate matter that is about three per cent the diameter of a human hair and can lead to premature deaths from heart and lung diseases, decreased from 149 microgram per cubic meter (g/m3) in 2014 to 101 g/m3 in 2020, it said.

The annual average of PM10 also decreased from 324 g/m3 in 2014 to 187 g/m3 in 2020, according to the Economic Survey report, tabled by Deputy Chief Minister Manish Sisodia in the Delhi Assembly on Monday.

PM6 levels below 40 g/m3 and PM10 levels below 100 g/m3 are considered safe in India.

The annual average for PM2.5 and PM10, at all the monitoring locations, exceeded the prescribed standards, the report said.

Nitrogen Dioxide's annual average concentration has decreased from 82.45 g/m3 in 2014 to 40.30 g/m3 in 2020.

The yearly average of carbon monoxide concentration has dipped to 1.27 mg/m3 in 2020. It was 2.07 mg/m3 in 2017, the highest in the last seven years.

The safe limit for CO levels is 2 mg/m3.

However, no significant variation was observed in the annual average value for Sulphur dioxide, which emanates during the burning of fossils fuels, between 2014 and 2020.

The annual city average for SO2 at all the monitoring locations is within the prescribed standard i.e 50g/m3, it said.

Various studies conducted in the wake of COVID-19-induced lockdowns have shown that air pollution levels have fallen significantly across the world due to the reduced traffic and restricted industrial activity.


(Only the headline and picture of this report may have been reworked by the Business Standard staff; the rest of the content is auto-generated from a syndicated feed.)


Dear Reader,


Business Standard has always strived hard to provide up-to-date information and commentary on developments that are of interest to you and have wider political and economic implications for the country and the world. Your encouragement and constant feedback on how to improve our offering have only made our resolve and commitment to these ideals stronger. Even during these difficult times arising out of Covid-19, we continue to remain committed to keeping you informed and updated with credible news, authoritative views and incisive commentary on topical issues of relevance.

We, however, have a request.

As we battle the economic impact of the pandemic, we need your support even more, so that we can continue to offer you more quality content. Our subscription model has seen an encouraging response from many of you, who have subscribed to our online content. More subscription to our online content can only help us achieve the goals of offering you even better and more relevant content. We believe in free, fair and credible journalism. Your support through more subscriptions can help us practise the journalism to which we are committed.

Support quality journalism and subscribe to Business Standard.

Digital Editor

Business Standard is now on Telegram.
For insightful reports and views on business, markets, politics and other issues, subscribe to our official Telegram channel