Ozone pollution returns to Île-de-France this Friday, July 10, 2026, as heatwaves grip the region. According to the Prefecture of Police, Airparif anticipates a likely breach of the information and recommendations threshold, set at 180 µg/m³. The entire region is affected, from Paris to the eight departments of Île-de-France.
In response to the situation, Patrice Faure, Police Prefect and Prefect of the Paris Defense and Security Zone, has set up a information and recommendation framework aimed at reducing pollutant emissions. For the time being, these are guidelines rather than mandatory restrictions.
The ozone is an irritating gas. When it concentrates near the ground, it can cause eye irritation, coughing, breathing difficulties or a sensation of chest tightness, especially for children, asthmatics and sensitive people.
For Friday, July 10, 2026, the Police Prefecture urges people to delay car trips if possible, to favor the cleanest vehicles (notably electric or zero-emission), and to lean into carpooling, public transport, walking or cycling. Drivers are also asked to slow down across the entire region:
Transit trucks over 3.5 tonnes are asked to bypass the metropolitan area via the Francilienne beltway.
As of now, the Police Prefecture's briefing does not include a differentiated traffic scheme or any mandatory restrictions for the most polluting vehicles (unlike last June's episode). Today's guidance is therefore only a recommendation.
The prefecture says it will continue to monitor air quality and, if the episode lasts, could impose tougher measures.
In Paris, the City of Paris offers free residential parking for Friday, July 10, 2026, as provided for in the plan for pollution spikes. The prefecture also urges people to telework, to adjust hours, or to activate mobility plans for commuting.
Additional measures are advised to avoid worsening the episode: steer clear of solvent-based products (acetone, varnish, glues, paints) and limit the operation of pollutant-emitting installations.
This episode of pollution unfolds in a heatwave context, with Île-de-France remaining under orange alert for July 9 and 10, with peaks up to 38°C forecast for Friday, according to Météo-France. To track changes in the air quality, information is available on the sites of Airparif, the Préfecture de Police, and the ARS Île-de-France. Our tips for limiting exposure to pollution are also available on our side.
