BWSA
| Acronym | Definition |
|---|---|
| BWSA | Bolton Wanderers Supporters' Association (football fan club; UK) |
| BWSA | Bulk Water Supply Agreement (Australia) |
| BWSA | Benbrook Water and Sewer Authority (est. 1955; Benbrook, TX) |
| BWSA | Barangay Water and Sanitation Association (Philippines) |
| BWSA | Bulk Waste Storage Area (environmental restoration) |