Su Watergas sono presenti 356 associazioni internazionali.

EDI

ENERGY DELTA INSTITUTE

PO Box 70017 9704 AA Groningen NL
Nijenborgh 6
AG Groningen (Netherlands)

EEGS

ENVIRONMENTAL & ENGINEERING GEOPHYSICAL SOCIETY

1391 Speer Blvd., Ste 450
Denver CO 80204 (United States)