| City of Calgary, Alberta, Canada |
Chicago Faucets |
| CA American Water-Baldwin Hills |
Chicago Metropolitan Agency for Planning |
| CA State Water Resources Control Board |
City of Chino, California |
| California Urban Water Conservation Council |
City of Chino Hills, California |
| California Water Service Company |
City West Water, Ltd |
| Canadian Water & Wastewater Association |
City of Clayton, Georgia |
| Capital Regional District |
Coalition for Water Security |
| Caroma USA |
Cobb County Water System |
| Cascade Water Alliance |
City of College Station, Texas |
| Castleman & Sons Plumbing, Inc. |
Colorado Springs Utilities |
| Center for Neighborhood Technology |
Colorado Water Conservation Board |
| Central Basin Municipal Water District |
Connecticut Water |
| CH2M Hill |
Conserve Florida Water Clearinghouse |
| Chappell Roberts |
Cucamonga Valley Water District |
| City of Charlottesville, Virginia |
Cypress Forest Public Utility District |
| Cinco Municipal Utility District #1 |
|
| City of Chicago, Illinois |
|