Blue Water Area Transit
| BWAT bus in downtown Port Huron | |
| Founded | 1976 | 
|---|---|
| Headquarters | 2021 Lapeer Avenue | 
| Locale | Port Huron, Michigan | 
| Service area | St. Clair County, Michigan | 
| Service type | bus service, paratransit | 
| Routes | 9 | 
| Daily ridership | 4,000 (weekdays, Q1 2025) | 
| Annual ridership | 1,037,500 (2024) | 
| Fuel type | CNG | 
| Website | bwbus | 
Blue Water Area Transit (BWAT) is the public transit operator serving Port Huron, Michigan and surrounding St. Clair County. Operated by the Blue Water Area Transportation Commission (BWATC), the BWAT system includes fixed-route buses in the Port Huron area, plus commuter routes (connecting the city to SMART in Metro Detroit) and paratransit services. In 2024, the system had a ridership of 1,037,500, or about 4,000 per weekday.