On July 9, 2026, a report revealed that harmful ozone levels may have reached two-thirds of the European Union's population during the record-breaking heat wave in June. Nearly 300 million people, including 100 million children and elderly individuals, faced elevated levels of this toxic pollutant as temperatures soared across Europe, according to a report from the NGO Global Witness shared with AFP.
Impact of Ozone Pollution on Health
Ground-level ozone, unlike the protective ozone layer in the atmosphere, poses serious health risks. This pollutant is a primary component of smog, leading to respiratory problems, lung tissue damage, and increased asthma attacks. The European Environment Agency attributed over 63,000 deaths and billions of euros in crop damage to ozone pollution in 2023 alone.
During the heat wave from June 21-28, the report analyzed data from 162 air quality monitoring stations across Europe. It found that nearly 298 million people were exposed to levels above the EU's recommended maximum of 120 micrograms of ozone per cubic meter. Furthermore, approximately 87% of the EU's 450 million inhabitants faced levels exceeding the World Health Organization's guideline of 100 micrograms per cubic meter.
Record-Breaking Ozone Levels
The report indicated that around 72 million people encountered the most dangerous threshold of 150 micrograms per cubic meter. Notably, two-thirds of monitoring stations recorded readings in the top 1% of all June days since 2013, with the highest level reaching 233.7 micrograms in North Rhine-Westphalia, Germany, on June 27.
- 63,000 deaths attributed to ozone pollution in 2023
- 300 million people exposed to harmful ozone levels
- 87% of EU population faced elevated ozone levels
- 72 million at risk of severe health effects
Causes and Future Implications
Ground-level ozone forms through chemical reactions involving nitrogen oxides from traffic and organic compounds from methane emissions. Laurence Rouil, director of the Copernicus Atmosphere Monitoring Service, emphasized that if these pollutants are not emitted, ground-level ozone will not form. The report underscores the urgent need for international collaboration to address ozone pollution and its health impacts.
James Weber, a climate scientist at the University of Reading, noted that similar trends were observed in the U.K. during the heat wave, where more than half of air pollution monitoring sites exceeded WHO's ozone limit. He cautioned that climate change will likely lead to longer and more frequent heat waves, increasing the risks associated with ozone pollution.
🤖 This article was rewritten by Feed and Figures' editorial AI from a report originally published by Phys.org. Facts and quotes are preserved from the original; the rewrite focuses on clarity and structure. For the unedited original, see the source link below.
