Companhia de Saneamento Basico do Estado de Sao Paulo
Companhia de Saneamento do Parana
Companhia Estadual De Aguas E Esgotos
Beijing Enterprises Water Group Ltd
Beijing Capital Water
Essential Utilities Inc
American States Water Company
California Water Service Group
Veolia Environnement S.A.
Suez Environnement Company
American Water Works Company Inc.