The Indian Water Works Association is a voluntary organization of Professionals concerned with WATER....

WATER for Municipal, Industrial & Agricultural uses.
WASTE WATER collection, treatment, disposal and reuse.

The Association founded in 1968 (and registered under the Societies Registration Act of 1961) with headquarter in Mumbai and 27 IWWA centres in the Country, presently has membership of 6,500 plus.
To cite a few, they Include...

The decision makers in Water & Waste Water Sector such as Chief Engineers and Heads of Departments of Government and Semi - Govt. Organizations.
The policy implementing Engineers,Scientists,Hydro-Geologists,Environmentalists, Chemists,Biologists etc.
The beneficiary & contributing organizations of the Sector viz. Municipalities,Water Supply and Sewerage Boards,Pollution Control Boards,Irrigation Departments,Engg.& Science Colleges,Research Institutes etc.
The supporting limbs of the Sector viz. Industrial Houses, Equipment Manufacturers, Consultants, Contractors etc.