| Business | Phone |
| Paul Marchand Septic Svc 25 Elm St, Blackstone 1504 | (508) 883-1400 |
| Marchand's Septic Svc 137 Mendon St, Blackstone 1504 | (508) 883-9600 |
| Jim Darling Septic Svc 303 Lincoln St, Blackstone 1504 | (508) 883-1685 |
| Gibson Cesspool Svc Blackstone 1504 | (508) 883-0778 |