Su Watergas sono presenti 357 associazioni internazionali.

ASTEE (IWA, ISWA, EWA FRANCE)

ASSOCIATION SCIENTIFIQUE ET TECHNIQUE POUR L'EAU ET L'ENVIRONNEMENT

51 Rue Salvador Allende
Nanterre Cedex (France)

AWA

AUSTRALIAN WATER ASSOCIATION

PO Box 222 St Leonards NSW 1590 AU
Level 6, 655 Pacific Highway
St Leonards NSW 2065 (Australia)

AWRA

AMERICAN WATER RESOURCES ASSOCIATION

PO Box 2663
Woodbridge VA 22195 (United States)

AWS

AMERICAN WELDING SOCIETY

8669 NW 36 Street - Suite 130
Miami FL 33166-6672 (United States)

AWT

ASSOCIATION OF WATER TECHNOLOGIES

1300 Piccard Drive - Suite LL 14
Rockville MD 20850 (United States)

AWWA

AMERICAN WATER WORKS ASSOCIATION

6666 West Quincy Avenue
Denver CO 80235 (United States)