Heat wave: continuation of the ozone pollution episode in France

Many regions of France were still experiencing high levels of ozone concentrations in the air due to the early heat wave affecting the country, according to the official Prev'Air bulletin published on Saturday, which calls for "

".

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“

”, indicated the platform managed by Ineris. (National Institute for the Industrial Environment and Risks).

It reported "

" (180 µg/m3 on average hourly) in Ile-de-France, Hauts-de-France, Normandy and Auvergne-Rhône-Alpes.

Exceedances of this threshold are also possible in the Grand-Est, Centre-Val-de-Loire, Pays de la Loire, Brittany, New-Aquitaine, Bourgogne-Franche-Comté and Provence-Alpes-Côte-d'Azur regions.

“The situation should evolve favorably” from Sunday

"

" from Sunday, "

", specified the platform in its newsletter.

Ozone is a so-called “

” pollutant because it is not directly released by an activity.

It results from chemical reactions, under the effect of the sun, involving pollutants present in the air, such as nitrogen oxides, emitted mainly by road traffic, and volatile organic compounds (hydrocarbons, solvents, etc.) rejected by industry.

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It is an irritating gas that easily penetrates to the finest respiratory tracts.

It is especially a problem in summer, in periods of strong sunshine, if there is no wind to disperse it.

It can be transported over long distances.