| Business | Phone |
| Dwk Plumbing & Heating 804 Shawnee Brooke Dr, Havre De Grace 21078 | (410) 939-0614 |
| Emerson's Plumbing & Heating 204 Congress Ave, Havre De Grace 21078 | (410) 734-6939 |
| Expert Plumbing Svc 301 Barrows Ct, Havre De Grace 21078 | (410) 942-0042 |
| Hadry Plumbing & Heating Svc 310 Seneca Ave, Havre De Grace 21078 | (410) 939-0639 |
| J & D Plumbing 718 Craigs Corner Rd, Havre De Grace 21078 | (410) 734-9065 |