| Country | Institute | |
| Austria | Umweltbundesamt | |
| | Oberösterreichische Landesregierung | |
| Belgium | IRCEL/CELINE | |
| Bulgaria | Executive Environmental Agency | |
| Croatia | Energy and Environmetal Protection Institute EKONERG | |
| | Institute for Medical Research IMI | |
| | Croatian Hydrological and Meteorological Service | |
| Czech Republic | Czech Hydrometeorological Institute | |
| Cyprus | Ministry of Labour and Social Insurance | |
| Denmark | NERI | |
| Estonia | Estonian Environmental Research Centre | |
| Finland | FMI | |
| France | LCSQA-EMD | |
| | LCSQA-INERIS | |
| | LCSQA-LNE | |
| Germany | LANUV NRW | |
| | Umweltbundesamt | |
| Greece | Ministry of Environment | |
| Hungary | Hungarian MeteorologicalService | |
| Ireland | EPA | |
| Italy | CNR | |
| | ISPRA | |
| Latvia | Latvian Hydrometeorological Agency | |
| Lithuania | Environment Protection Agency | |
| Luxembourg | Adm. de l'Environnement | |
| Malta | Malta Environment & Planning Authority | |
| Poland | Chief Inspectorate for Environmental Protection | |
| Portugal | Insituto do Ambiente | |
| Romania | National R & D Institute for Environment Protection | |
| Slovakia | Slovak Hydrometeorological Institute | |
| Slovenia | Environmental Agency of the Republic of Slovenia | |
| Spain | ISCIII | |
| Sweden | IVL | |
| | ITM | |
| The Netherlands | RIVM | |
| Iceland | Environment Agency Iceland | |
| Norway | NILU | |
| Switzerland | EMPA | |
| | BAFU | |
