Air and Health Indicators 2019-2021-revised

To better protect populations and help decision-makers translate actions for air quality into health gains for populations, Atmo Auvergne-Rhône-Alpes, with financial support from the Auvergne-Rhône-Alpes region, and Santé Publique France and the ORS Auvergne-Rhône-Alpes have therefore partnered to create indicators to assess the health impact of pollution at the local level. These communal indicators make it possible to link air quality to health impacts. **/!\ Revision** In 2022, the indicators were revised to facilitate the interpretation of trends, while maintaining a relevant representativeness of pollutants. Thus, modeled concentrations of PM2.5 fine particles are averaged over 2 years to express mean population exposure (concentration in μg/m³) as well as a share of the population exposed to concentrations greater than 10 μg/m³ (in %). Nitrogen dioxide (NO2) less impacted by meteorological conditions than fine particles, is modeled for a single year to express an annual mean exposure of the population (concentration in μg/m³) and a share of the population exposed to concentrations greater than 10 μg/m³ (in %). The year 2020, particularly in terms of emissions due to successive lockdowns, could not be included in an average that must be representative of a trend. It was chosen to remove 2020 from the indicator calculation. Thus, the revised indicator calculated for 2021 concerns the years 2019 and 2021 for PM2.5 and 2021 for NO2.