We found 27 public water systems that could serve the same population as Unity School (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Metropolis | Metropolis | 6,797 | 0 | 36 |
| Fort Massac Pwd | Joppa | 5,858 | 0 | 3 |
| Brookport | Brookport | 989 | 0 | 3 |
| Jack Jones | County of Massac | 500 | 0 | 0 |
| Veach's Truckstop | County of Massac | 500 | 0 | 0 |
| Joppa | Joppa | 472 | 0 | 9 |
| Honeywell International Inc | County of Massac | 470 | 0 | 5 |
| Allied Chemical | County of Massac | 450 | 0 | 0 |
| Electrical Energy Inc | County of Massac | 450 | 0 | 0 |
| Electric Energy Inc | County of Massac | 350 | 0 | 0 |
| Unity School | County of Massac | 230 | 0 | 0 |
| ZION UNITED CHURCH OF CHRIST | County of Massac | 200 | 0 | 0 |
| ZION UNITED CHURCH OF CHRIST | County of Massac | 200 | 0 | 0 |
| Jefferson School | County of Massac | 180 | 0 | 0 |
| Saint Johns Lutheran Church | County of Massac | 180 | 0 | 0 |
| Jefferson School | County of Massac | 180 | 0 | 0 |
| Saint Johns Lutheran Church | County of Massac | 180 | 0 | 0 |
| Joppa Portland Cement | County of Massac | 150 | 0 | 0 |
| Super 8 | County of Massac | 126 | 0 | 0 |
| Metropolis Inn, Inc | County of Massac | 118 | 0 | 0 |
| Mary Evans | County of Massac | 50 | 0 | 0 |
| Trunkline Gas Co | County of Massac | 50 | 0 | 0 |
| Trunkline Gas Company | County of Massac | 45 | 0 | 0 |
| Mermet Store | County of Massac | 40 | 0 | 0 |
| The Buggy | County of Massac | 30 | 0 | 0 |
| Ft Massac Stt Pk | Unspec Pl In Co | 25 | 0 | 0 |
| Fort Massac State Park | County of Massac | 25 | 0 | 0 |