| Business | Phone |
| Havre De Grace City Yacht 352 Commerce St, Havre De Grace 21078 | (410) 939-0015 |
| Havre De Grace Visitor Ctr 450 Pennington Ave, Havre De Grace 21078 | (410) 939-2100 |
| Havre De Grace Waste Water 1 Jerry Foster Way, Havre De Grace 21078 | (410) 939-1220 |
| Havre De Grace Waste Water 395 Wilson St, Havre De Grace 21078 | (410) 939-1220 |
| Havre De Grace Water Plant 415 Saint John St, Havre De Grace 21078 | (410) 939-1070 |