We found 44 public water systems that could serve the same population as Mary I. Johnson School/admin Building (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Waterbury Water Department | Middlebury, Prospect, Waterbury, Watertown, Wolcott | 107,271 | 30 | 6 |
| Watertown Water & Sewer Authority | Middlebury, Waterbury, Watertown | 9,972 | 0 | 49 |
| Heritage Water Company | Middlebury, Oxford, Southbury | 7,300 | 0 | 15 |
| Ctwc - Naugatuck Div, Town Of Middlebury | Middlebury, Waterbury | 1,332 | 0 | 0 |
| Westover Water Co | Middlebury | 510 | 0 | 7 |
| Middlebury Elementary School | Middlebury | 412 | 0 | 23 |
| Quassy Amusement Park | Middlebury | 325 | 0 | 2 |
| Ctwc - Naugatuck Reg-heritage/middlebury | Middlebury | 128 | 0 | 0 |
| Ctwc - Naugatuck Reg - Hillcrest | Middlebury | 120 | 0 | 0 |
| Aquarion Water Co Of Ct - West Shore | Middlebury | 100 | 0 | 0 |
| Middlebury Commons | Middlebury | 76 | 0 | 0 |
| Middlebury Hamlet | Middlebury | 75 | 0 | 0 |
| Four Corners Store | Middlebury | 60 | 0 | 0 |
| Middlebury Convalescent Home | Middlebury | 58 | 0 | 0 |
| 590 Middlebury Road | Middlebury | 53 | 0 | 0 |
| Village Square | Middlebury | 50 | 0 | 0 |
| Middlebury Terrace Water Supply | Middlebury | 40 | 0 | 0 |
| Wesson, Inc. | Middlebury | 31 | 0 | 0 |
| Middlebury Recreation Park | Middlebury | 27 | 0 | 0 |
| Wesson Shell #4 | Middlebury | 25 | 0 | 0 |
| Hop Brook Lake Rec Area (west Lawn Cs) | Middlebury | 25 | 0 | 0 |
| St. George Church | Middlebury | 25 | 0 | 0 |
| Middlebury Public Library | Middlebury | 25 | 0 | 0 |
| Middlebury Professional Bldg | Middlebury | 25 | 0 | 0 |
| Middlebury Garage | Middlebury | 25 | 0 | 0 |
| Middlebury | 25 | 0 | 0 | |
| Maggie Mcflys | Middlebury | 25 | 0 | 0 |
| Ledgewood Park | Middlebury | 25 | 0 | 0 |
| Middlebury Office Park, Lp | Middlebury | 25 | 0 | 0 |
| Fire Department | Middlebury | 25 | 0 | 0 |
| Fire And Police Stations | Middlebury | 25 | 0 | 0 |
| Country Line Buick-nissan, Inc. | Middlebury | 25 | 0 | 0 |
| American Bank | Middlebury | 25 | 0 | 0 |
| Sandy Beach Swim Club | Middlebury | 25 | 0 | 0 |
| Quassapaug Sailing Center, Inc. | Middlebury | 25 | 0 | 0 |
| Maples Restaurant | Middlebury | 25 | 0 | 0 |
| Middlebury Mobil | Middlebury | 25 | 0 | 0 |
| Highfield, Inc. | Middlebury | 25 | 0 | 0 |
| Quassy Field | Middlebury | 25 | 0 | 0 |
| Lake Quassapaug Outing Club | Middlebury | 25 | 0 | 0 |
| Hop Brook Lake Rec Area (first Cs) | Middlebury | 25 | 0 | 0 |
| American Savings Bank | Middlebury | 9 | 0 | 0 |
| Sullivans Jewelers | Middlebury | 5 | 0 | 0 |
| Sunoco | Middlebury | 2 | 0 | 0 |