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Summer of 2022 saw increased ozone levels in India: CSE analysis
Updated On: 04 June, 2022 05:18 PM IST | New Delhi | IANS
During one of the hottest summers, the excessive ozone levels have made the air in Delhi-NCR most toxic in India followed by Mumbai, Kolkata, Hyderabad, Chennai and Bengaluru
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The summer of 2022 - one of the hottest in history - has witnessed widespread excessive ozone levels, making the air of Delhi-NCR more toxic, while other metros are not far behind, said a latest analysis released by the Centre for Science and Environment (CSE) on Friday. Among the six big metros, Mumbai is second, followed by Kolkata, Hyderabad, Chennai and Bengaluru - with the last two having longer durations of exceedance despite lower frequency compared to the other metros, as per the latest air quality analysis by CSE released in the run up to the World Environment Day on June 5.
Geographical spread of ground-level ozone pollution in Delhi-NCR during March-April was highest in past four years. Ground-level ozone usually exceeds the safety standard on all days of summer in some location in Delhi-NCR every year. "But this year, the spatial spread (number of stations exceeding the standard across the city) has been much higher. On an average, 16 stations have exceeded the standard daily this March and April, which is 33 per cent increase from previous year March and April. During 2020, when lockdowns had reduced the precursor gases needed for formation of ground-level ozone, the number was down to 10 stations daily," the CSE analysis showed.
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