- Development Agency of Eastern Thessaloniki’s Local Authorities (Grecia) Capofila
- North Denmark Region (Danimarca)
- Città Metropolitana di Bologna (Italia)
- ERVET (Italia)
- Regional Council of South Ostrobothnia (Finlandia)
- JPYP Business Service (Finlandia)
- Bulgarian Association of Municipal Environmental Experts – BAMEE (Bulgaria)
- Welsh Government (Regno Unito)
- Region of Central Macedonia (Grecia)