They set the fundamentals in terms of surveillance, information and action. In the event of non-compliance, States are exposed to condemnation.

French regulations specify the modalities for implementing European directives, or even supplement them.

It is triggered when a pollution episode is predicted to limit its effects and protect populations.

At different geographical scales and for different sectors, they set actions to improve air quality in a transversal approach.

Non-binding, non-regulatory, they reflect the state of scientific knowledge concerning the impact of air pollution on health.

Created in 1994 at the initiative of the Ministry of the Environment and approved air quality monitoring associations. The regulatory ATMO index was completely revised as of 01/01/2021.