British Zeolite Association (affiliated since 1978)
Dutch Zeolite Association (affiliated since 1994)
French Zeolite Association (affiliated since 1995)
German Zeolite Association (affiliated since 1995)
Hungarian Zeolite Association (affiliated since 1995)
Italian Zeolite Association (affiliated since 1994)


rules for affiliation can be found here

Bulgarian Zeolite Association
Czech Zeolite Group
Georgian Zeolite Association
Indonesian Zeolite Association
Japanese Zeolite Association
Mongolian Zeolite Association
NorthEast Corridor Zeolite Association, USA (NECZA)
Polish Zeolite Association
Romanian Zeolite Association
Slovak Zeolite Group
Spanish Zeolite Association

Federation of European Zeolite Associations (FEZA)
International Committee on Natural Zeolites (ICNZ)
International Mesostructured Materials Association (IMMA)