The following organisations collaborate within the AQUILA activities: World Health Organisation Collaborating Centre for Air Quality Management and Air Pollution Control European Environment Agency CEN Technical Committee AIR QUALITY The following institutes from EU Candidate and Potential Candidate Countries follow the AQUILA activities: Institute of Public Health, Belgrade, Republic of Serbia Ministry of Environment and Physical Planning, Skopje, Republic of North Macedonia Ministry of Environment and Forestry, Ankara, Turkey CETI, Podgorica, Montenegro