In 2023, the environmental administration organised a nationwide air quality measurement campaign in collaboration with 33 participating municipalities and Klima-Agence. More specifically, it is a national measurement campaign of NO2 by passive tubes in the context of the national air quality program and the "Klimapakt Loftqualitéit". The campaign aims to raise awareness and inform municipalities and their inhabitants about the air quality in their respective municipalities, motivate municipalities to contribute to improving their air quality, and demonstrate the efforts undertaken by municipalities for future communications.

In 2021, the environmental administration organised a nationwide air quality measurement campaign in collaboration with 24 participating municipalities and myenergy. More specifically, it is a national measurement campaign of NO2 by passive tubes in the context of the national air quality program and the "Klimapakt Loftqualitéit". The campaign aims to raise awareness and inform municipalities and their inhabitants about the air quality in their respective municipalities, motivate municipalities to contribute to improving their air quality, and demonstrate the efforts undertaken by municipalities for future communications.

Every year, the Environment Administration organises a nationwide ambient air quality measurement campaign in collaboration with the Klima-Agence and participating municipalities. More specifically, this involves a national campaign to measure NO2 using passive tubes as part of the national air quality programme and the "Klimapakt Loftqualitéit". The aim of the campaign is to raise awareness and inform local authorities and their residents about the air quality in their respective communities, to motivate local authorities to help improve their air quality, and to demonstrate the efforts made by local authorities with a view to future communications.

In 2022, the environmental administration organised a nationwide air quality measurement campaign in collaboration with 30 participating municipalities and Klima-Agence. More specifically, it is a national measurement campaign of NO2 by passive tubes in the context of the national air quality program and the "Klimapakt Loftqualitéit". The campaign aims to raise awareness and inform municipalities and their inhabitants about the air quality in their respective municipalities, motivate municipalities to contribute to improving their air quality, and demonstrate the efforts undertaken by municipalities for future communications.

A medium combustion plant is any technical device with a rated thermal input of 1 MW or more and less than 50 MW in which combustible products are oxidised in order to use the heat thus produced, such as combustion plants, engines and gas turbines. All medium combustion installations must be registered with the Environmental Administration, which keeps a public register with information on each installation. The operating conditions and the obligations of the operators of these installations are laid down in the Grand-Ducal Regulation of 24 April 2018 on the limitation of emissions from medium combustion installations.

- European air quality index (based on pollutant concentrations in µg/m3): measurements over the last 100 days for each station - The sub-indices O3, PM10, PM2.5, NO2, and SO2 are available according to the type of station (industrial, background or traffic) in accordance with the methodology for calculating the European air quality index for the measuring stations throughout the Greater Region. - Data sources: ATMO Grand Est; Agence Wallonne de l'Air et du Climat - AWAC; Landesamt für Umwelt- und Arbeitsschutz Saarland - IMMESA; Landesamt für Umwelt Rheinland-Pfalz - ZIMEN; Administration de l'environnement Luxembourg. Harmonization: ATMO Grand Est and GIS-GR 2020

- Ozone pollution (PM2.5): number of days on which a sliding 8-hour average exceeded 120 µg/m3 (micrograms per cubic metre). Average 2021-22-23 for each station - Data sources: ATMO Grand Est, Agence Wallonne de l'Air et du Climat - AWAC, Landesamt für Umwelt- und Arbeitsschutz Saarland - IMMESA, Landesamt für Umwelt Rheinland-Pfalz - ZIMEN, Administration de l'environnement Luxembourg. Harmonization: ATMO Grand Est and GIS-GR 2024

- Nitrogen dioxide (NO2) pollution: annual mean values for 2023 in µg/m3 (micrograms per cubic metre) for each station - Data sources: ATMO Grand Est, Agence Wallonne de l'Air et du Climat - AWAC, Landesamt für Umwelt- und Arbeitsschutz Saarland - IMMESA, Landesamt für Umwelt Rheinland-Pfalz - ZIMEN, Administration de l'environnement Luxembourg. Harmonization: ATMO Grand Est and GIS-GR 2024

- Pollution by fine particles with a diameter of less than 2.5 micrometres (PM2.5): annual mean values for 2023 in µg/m3 (micrograms per cubic metre) for each station - Data sources: ATMO Grand Est, Agence Wallonne de l'Air et du Climat - AWAC, Landesamt für Umwelt- und Arbeitsschutz Saarland - IMMESA, Landesamt für Umwelt Rheinland-Pfalz - ZIMEN, Administration de l'environnement Luxembourg. Harmonization: ATMO Grand Est and GIS-GR 2024

- Pollution by particles with a diameter of less than 10 micrometres (PM10): annual mean values for 2023 in µg/m3 (micrograms per cubic metre) for each station - Data sources: ATMO Grand Est, Agence Wallonne de l'Air et du Climat - AWAC, Landesamt für Umwelt- und Arbeitsschutz Saarland - IMMESA, Landesamt für Umwelt Rheinland-Pfalz - ZIMEN, Administration de l'environnement Luxembourg. Harmonization: ATMO Grand Est and GIS-GR 2024