Frederick County Water Service Area (0)
| W-1 |
| W-3 |
| W-4 |
| W-5 |
| Multi-Use |
| Existing Reservoir |
| Planned Reservoir |
| Planned Service |
| No Planned Service |
Frederick City Water Service Area (1)
| W-1 |
| W-3 |
| W-4 |
| W-5 |
| Multi-Use |
| Existing Reservoir |
| Planned Reservoir |
| Planned Service |
| No Planned Service |
Frederick County Sewer Service Area (2)
| S-1 |
| S-3 |
| S-4 |
| S-5 |
| Multi-Use |
| Planned Service |
| No Planned Service |
Frederick City Sewer Service Area (3)
| S-1 |
| S-3 |
| S-4 |
| S-5 |
| Multi-Use |
| Planned Service |
| No Planned Service |
|