The Crit'Air air quality certificate is mandatory in France for :

- vehicles travelling and parking in low-emission mobility zones decided by local authorities.

- vehicles travelling in the event of the implementation of differentiated traffic decided by the prefects during a pollution episode.

Local authorities with acute pollution problems can set up low-emission mobility zones using Crit'air certificates to adapt traffic and improve air quality in the long term.

In these zones, the certificate becomes essential for driving.

You can order your certificate online here: https://www.certificat-air.gouv.fr/