| 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) |