We found 21 public water systems that could serve the same population as Happy Clam Restaurant (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Tenants Harbor Water District | St George | 348 | 0 | 21 |
| Msad 50 St George Elem School | St George | 334 | 0 | 0 |
| Port Clyde Water District | St George | 330 | 0 | 5 |
| East Wind Inn | St George | 302 | 0 | 0 |
| Lukes At Tenants Harbor | St George | 225 | 0 | 0 |
| Craignair Inn | St George | 207 | 0 | 6 |
| Driftwood Drive In | St George | 165 | 0 | 0 |
| North Cottages | St George | 128 | 0 | 0 |
| Farmers Restaurant | St George | 123 | 0 | 0 |
| Kinney-melquist Post | St George | 120 | 0 | 0 |
| Outward Bound -the Landing | St George | 100 | 0 | 0 |
| Blueberry Cove Camp | St George | 79 | 0 | 0 |
| Dup Blueberry Cove | St George | 79 | 0 | 0 |
| Great Eastern Mussel Farm | St George | 50 | 0 | 0 |
| Dip Net | St George | 39 | 0 | 0 |
| Chester Davis | St George | 25 | 0 | 0 |
| Cone Heads | St George | 25 | 0 | 0 |
| St George | 25 | 0 | 0 | |
| Town Of St George-fire Station | St George | 25 | 0 | 0 |
| Pineledge General Store | St George | 25 | 0 | 0 |
| Lighthouse Shop | St George | 10 | 0 | 0 |