| Jay Village Water District | Jay, ME | 975 | 124 | - |
| South Freeport Water District | Poland, ME | 960 | 8 | - |
| Cooks Lobster House | Bailey Island, ME | 950 | 41 | - |
| Kingfield Water District | Kingfield, ME | 950 | 27 | - |
| Maine Water Company Hartland Division | Poland, ME | 910 | 93 | - |
| Sunday River Brewing Company | Newry, ME | 889 | 31 | - |
| US Nps Jordan Pond Hse (18) | Trenton, ME | 888 | 13 | - |
| Limestone Water & Sewer District | Limestone, ME | 875 | 78 | - |
| Mount Desert Water Dist -Seal | Northeast Harbor, ME | 865 | 24 | - |
| Harrison Water District | Harrison, ME | 863 | 24 | - |
| Rsu 38 Maranacook Community School | Readfield, ME | 816 | 141 | - |
| Maine Water Company Warren Division | Poland, ME | 815 | 4 | - |
| Lake Pemaquid Campground | Damariscotta, ME | 808 | 40 | - |
| Msad 06 Bonny Eagle Middle School | Buxton, ME | 800 | 43 | Detected |
| Mdoc State Park-Range Pond | Augusta, ME | 800 | 16 | - |
| Mdoc State Park-Popham Beach West | Augusta, ME | 800 | 30 | - |
| Alfred Water District | Alfred, ME | 783 | 132 | - |
| Friendly Village of Gorham MHP | Gorham, ME | 763 | 51 | - |
| Winterport Water District | Winterport, ME | 763 | 24 | - |
| Asticou Inn | Northeast Harbor, ME | 760 | 6 | - |
| Rsu 35 Marshwood High School | Eliot, ME | 760 | 35 | - |
| Camp Sunshine | Casco, ME | 755 | 58 | - |
| Cornish Water District | Cornish, ME | 753 | 15 | - |
| Sunday River-Upper Cistern System | Newry, ME | 750 | 14 | - |
| Sunday River-Peak Lodge System | Newry, ME | 750 | 34 | - |
| Matterhorn Ski Bar | Newry, ME | 750 | 44 | - |
| Augusta Country Club | Manchester, ME | 750 | 85 | - |
| North Haven Water Department | North Haven, ME | 740 | 734 | - |
| Bowdoinham Water District | Bowdoinham, ME | 738 | 2 | - |
| Knights Hill Association | Bridgton, ME | 718 | 35 | - |
| Ashland Water & Sewer District | Ashland, ME | 713 | 64 | - |
| Msad 52 Leavitt Area High School | Turner, ME | 712 | 118 | - |
| Camp Laurel-Lodge | Lake Worth, ME | 710 | 4 | - |
| Lost Valley Ski Area | Auburn, ME | 710 | 18 | - |
| Fall Line Condos @ Sunday River | Bethel, ME | 710 | 20 | - |
| Shawnee Peak #1 Main Lodge | Bridgton, ME | 700 | 16 | - |
| Msad 61 Lake Region High School | Bridgton, ME | 700 | 295 | - |
| Winter Harbor Water District | Winter Harbor, ME | 700 | 52 | - |
| Hermit Island Cg #1 | Bath, ME | 695 | 16 | - |
| Sea-Vu South Campground | Wells, ME | 688 | 16 | - |
| Washburn Water & Sewer District | Washburn, ME | 688 | 147 | - |
| Erskine Academy | China, ME | 685 | 10 | - |
| Stonington Water Company | Winterport, ME | 683 | 158 | - |
| Mt Abram LLC-Main Lodge | Greenwood, ME | 675 | 99 | - |
| Bullwinkles Restaurant | Carrabassett Valley, ME | 675 | 8 | - |
| Rsu 40 Medomak Valley High School | Union, ME | 669 | 64 | - |
| Brownville Jct Water Dept | Brownville, ME | 663 | 8 | - |
| Sea-Vu West Campground | Wells, ME | 660 | 20 | - |
| Mdoc State Park-Mt Blue | Augusta, ME | 652 | 19 | - |
| Camp Laurel-South | Casco, ME | 650 | 11 | - |