Su Watergas sono presenti 356 associazioni internazionali.

EUWMA

THE EUROPEAN UNION OF WATER MANAGEMENT ASSOCIATIONS

c/o Dutch Water Authorities - PO Box 93218
AE Den Haag (Netherlands)

EWJ

EUROPEAN WATER JETTING INSTITUTE

Av. Rey Juan Carlos 92, Argalia Bursiness Center
28916 Leganés - Madrid (Spain)

EWRA

EUROPEAN WATER RESOURCES ASSOCIATION

c/o National Technical University of Athens
Iroon Polytechniou 9
Zografou, Atene (Greece)