Ozone levels in all megacities of the country have been high during summer of 2025, above one -third with Bangalore and Mumbai recording levels, above the standards set for summer days, a new center is a new center for analysis, a new center science and environment (CSE) analysis.
The new assessment used data from 80 continuous ambient air quality monitoring stations in Mumbai, Kolkata, Bangalore, Chennai and Hyderabad.
When CSE analyzed Delhi’s ozone (O3) level Last month, they were found to be more than each summer day between March 1 and May 31.
The new analysis stated that the ozone level in Bengaluru was more than 45 out of the 92-day summer days monitored by CSE, an increase of 29 percent compared to the previous summer. In Chennai, the ozone level exceeded the prescribed level to 15 of the 92 days, compared to more and more days for the same period last year.
Mumbai recorded an excess of ozone at 32 of the 92 days, marking a decline of 42 percent compared to the same period last year. In Kolkata, about 22 out of 92 days in this summer did maximum of ozone standards, which was more than 45 percent improvement last year.
Due to its reactive nature, unlike other pollutants, the O3 level is monitored in an average period of eight hours, rather than an average of 24-hour. The ozone standard for a period of eight hours is 100 micrograms/cubic meters according to the standard national environmental air quality standards (NAAQ).
CSE Executive Director, Anumita Roychovadhari said, “If uncontrolled, it can become a serious public health crisis as ozone is a highly reactive gas and unlike cities in North India, as well as ozone as well as other cities can be harmful with high temperatures and intense solar radiation, unlike high-term explosions, as well as.”
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“Ground-Level Ozone is beginning to emerge as a pollutant with cities that experience more than 8-hour standards. While it is expected to be more and more during the summer months, which is expected to be more during the summer months with strong sun-lightening days and summer, it is being highly highlighted as a round-round problem in hot climate.
Ozone is not a primary, but is a secondary pollutant formed through chemical reactions between other pollutants under sunlight. Therefore, the summer months see the spike in ozone concentrations. These chemicals include nitrogen oxide (NOX), volatile organic compounds, and carbon monoxide (CO), vehicle tailPipes, pollutants emitted from power plants, factories, CSE analysis.
Ground-level ozone can adversely affect the airways and lungs, increase sensitivity to infections, can spoil respiratory diseases, and reduce lung function.
Air Action Plan (T) NAAQs (T) Environmental Impact (T) Urban Air Pollution (T) Indian Express
