Air quality in Delhi: high temperature spikes ozone, pollution higher than in April ‘15: The Indian Express

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“…Ozone levels shot up to the highest during the odd even scheme so far on Sunday, according to ministry of earth sciences’ SAFAR, peaking around 75 parts per billion or 150 micrograms per cubic metre up from Saturday’s around 62 parts per billion or 124 micrograms per cubic metre. Between April 19-22 ozone levels had remained around 51-52 parts per billion or 102-104 micrograms per cubic metre. According to the CPCB, on Monday, also ozone levels remained high with five of nine stations including RK Puram, Punjabi Bagh and Anand Vihar recording Ozone as the dominant pollutant on Monday.

The second phase of the odd-even scheme vehicle has come exactly a year after a series of orders by the National Green Tribunal (NGT) on a spate of issues concerning air pollution in Delhi. These orders came in the backdrop of a series of articles published in The Indian Express, titled `Death by Breath’ which investigated the particulate matter curves in the capital from the pre-CNG days to 2015.

One year later, how far has the air quality changed in the capital?

If we compare the period April 15-25 the CPCB station at Punjabi Bagh recorded three “moderate days” last year and not a single moderate day this year. Compared to four “very poor” days last year, this year, we’ve had six days `very poor’ days this year.” The Indian Express. Read the full article and comparisons on delhiair.org.

Air quality in Delhi: high temperature spikes ozone, pollution higher than in April ‘15

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