Airparif barometer (ATO indicator)

**Airparif data included in the quarterly travel barometer of the City of Paris** (station of the 4th arrondissement) The ATMO index, adopted by the Ministry of Ecological Transition, is a qualifying daily indicator of air quality. It provides summary information in a simple form on the level of ambient air pollution, by aggregating data on concentrations of several air pollutants. It integrates the main regulated air pollutants, tracers of transport, urban and industrial activities: dusts PM10 and PM2.5, nitrogen dioxide, ozone, sulphur dioxide. The dataset shall contain, for each quarter, the number of days per class: “good”, “average”, “degraded”, “bad”, “very bad”, “extremely bad”. More information: <HTTPS://WWW.AIRPARIF.ASSO.FR/INDICE-ATMO> Check out the Quarterly Travel Barometer on Paris Data: [link](https://parisdata.opendatasoft.com/pages/observatoire-parisien-mobilites/)