We found 45 public water systems that could serve the same population as Colchester Fire District 3 (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Colchester Fire District 2 | Colchester | 8,300 | 0 | 8 |
| Colchester Fire District 1 | Colchester | 2,066 | 0 | 0 |
| Colchester Town | Colchester | 1,500 | 0 | 1 |
| Westbury Park | Colchester | 663 | 0 | 3 |
| Hillcrest Mhp Inc | Colchester | 615 | 0 | 12 |
| Westbury Park | Colchester | 600 | 0 | 0 |
| Malletts Bay Water Co | Colchester | 533 | 0 | 0 |
| Braults M.h.p. | Colchester | 450 | 0 | 0 |
| Camp Dudley At Kiniya | Colchester | 263 | 0 | 12 |
| Mallets Bay Water Co | Colchester | 240 | 0 | 0 |
| North Harbor | Colchester | 220 | 0 | 15 |
| Brown Ledge Camp | Colchester | 200 | 0 | 0 |
| Windemere Mhp | Colchester | 199 | 0 | 5 |
| Mills Point | Colchester | 180 | 0 | 0 |
| Spalding West Shore Asso | Colchester | 180 | 0 | 0 |
| Sand Dunes | Colchester | 165 | 0 | 0 |
| Colchester Point | Colchester | 105 | 0 | 0 |
| Captain Malletts | Colchester | 100 | 0 | 0 |
| B.u. Emporium | Colchester | 50 | 0 | 0 |
| Franks Place | Colchester | 50 | 0 | 0 |
| St. Michaels College | Colchester | 50 | 0 | 0 |
| Colchester Restaurant | Colchester | 50 | 0 | 0 |
| Dj's Pizza & Sub Deli,in | Colchester | 50 | 0 | 0 |
| Sunset Drive-in Theatre | Colchester | 50 | 0 | 0 |
| ZACHARYS PIZZA HOUSE | Colchester | 50 | 0 | 0 |
| Mountain View Drive In T | Colchester | 50 | 0 | 0 |
| YANKEE LANES | Colchester | 50 | 0 | 0 |
| Clover House Restaurant | Colchester | 50 | 0 | 0 |
| Malletts Bay Drive-in Th | Colchester | 50 | 0 | 0 |
| Casa Romano | Colchester | 50 | 0 | 0 |
| Bay Harbour Cottages | Colchester | 50 | 0 | 0 |
| Sandy Beach Cottages | Colchester | 50 | 0 | 0 |
| Beach & Boat Motel | Colchester | 50 | 0 | 0 |
| Broadacres Roller Skatin | Colchester | 50 | 0 | 0 |
| Finny's Fine Foods | Colchester | 50 | 0 | 0 |
| Sadies | Colchester | 50 | 0 | 0 |
| Jimmys Bay Side Snack Ba | Colchester | 50 | 0 | 0 |
| Chimney Hill Colchester | Colchester | 42 | 0 | 0 |
| Tessiers Cottages | Colchester | 34 | 0 | 0 |
| Marble Island Resort | Colchester | 28 | 0 | 0 |
| Pine Meadow Development | Colchester | 25 | 0 | 0 |
| Grand View Motor Inn | Colchester | 25 | 0 | 0 |
| Marble Island Resort | Colchester | 25 | 0 | 0 |
| Curfew Motel | Colchester | 25 | 0 | 0 |
| Ed+wills Snack Bar | Colchester | 25 | 0 | 0 |