Observers | Germany
- Federal Ministry for the Environment, Nature Conservation, Building and Nuclear Safety, Division WR III 2, Soil Conservation and Management of Contaminated Sites
- Bavarian State Ministry of the Environment and Consumer Protection
- Municipality of Sonthofen
- Bavarian State Office of Forestry (LWF)
- Federal Environment Agency (UBA-DE)
- European Land and Soil Alliance (ELSA) e.V.