IWWA
| Acronym | Definition |
|---|---|
| IWWA | Indian Water Works Association (Mumbai, India) |
| IWWA | Inland Wetlands and Watercourses Agency |
| IWWA | International Wild Waterfowl Association (Honeoye Falls, New York) |
| IWWA | Iowa Water Well Association (est. 1929; Des Moines, IA) |