We found 24 public water systems in Shelby county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Harlan Municipal Utilities | Harlan | 5,219 | 0 | 0 |
| Regional Water | Avoca | 4,065 | 0 | 9 |
| Elk Horn Muni Water Works | Elk Horn | 662 | 8 | 1 |
| Shelby Water Supply | Shelby | 651 | 0 | 12 |
| Prairie Rose State Park | County of Shelby | 500 | 0 | 0 |
| Earling Water Supply | Earling | 437 | 0 | 3 |
| Prairie Rose State Park | County of Shelby | 437 | 0 | 0 |
| Irwin Municipal Supply | Irwin | 341 | 0 | 4 |
| Defiance Water Department | Defiance | 284 | 0 | 41 |
| Panama Water Works | Panama | 221 | 0 | 2 |
| Portsmouth Water Supply | Portsmouth | 191 | 0 | 4 |
| Westphalia Water System | County of Shelby | 160 | 0 | 0 |
| Bethlehem Luth.church (harlan) | County of Shelby | 100 | 0 | 0 |
| Kirkman Water Supply | Kirkman | 76 | 0 | 0 |
| Telum Inc. | County of Shelby | 50 | 0 | 0 |
| Oil Station Cafe | County of Shelby | 50 | 0 | 0 |
| Broadway Trailer Court | County of Shelby | 48 | 0 | 0 |
| Shelby County Care Facility | County of Shelby | 30 | 0 | 0 |
| Kirkman Tap | County of Shelby | 25 | 0 | 0 |
| Westphalia Club House | County of Shelby | 25 | 0 | 0 |
| Manteno Pk-shelby Conservation | County of Shelby | 25 | 0 | 0 |
| North Mushroom Farm | Harlan | 25 | 0 | 0 |
| Rosman Glendale Frms Rec Area | County of Shelby | 25 | 0 | 0 |
| Elk Horn-shelby Conservation | County of Shelby | 25 | 0 | 0 |