| Business | Phone |
| Occupational & Environ Mdcn 11110 Medical Campus Rd, Hagerstown 21742 | (301) 714-4420 |
| Synagro Technologies Inc 1030 Frederick St, Hagerstown 21740 | (301) 791-0919 |
| Terraqueous Inc 11804 Greencastle Pike, Hagerstown 21740 | (301) 766-4705 |
| Maryland Environmental Svc 18901 Roxbury Rd, Hagerstown 21740 | (301) 791-4644 |
| Michael Clarke Inc Hagerstown 21740 | (301) 745-5212 |