We found 14 public water systems in Jennings county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Jennings Water, Inc. | North Vernon | 12,000 | 0 | 18 |
| North Vernon Water Department | North Vernon | 6,500 | 0 | 147 |
| Dupont Water Company | Dupont | 3,812 | 0 | 14 |
| Jennings Northwest Regional Utility | North Vernon | 3,270 | 0 | 1 |
| Hayden Water Association | North Vernon | 2,395 | 0 | 21 |
| Burnt Pines Water Association | North Vernon | 900 | 0 | 36 |
| Vernon Water Department | Vernon | 575 | 0 | 25 |
| Hickory Manor Mobile Home Park | North Vernon | 250 | 0 | 23 |
| Coffee Creek Conservation Club | Madison | 150 | 0 | 0 |
| Broomsage Ranch | County of Jennings | 100 | 0 | 0 |
| Muscatatuck Christian Ranch | North Vernon | 65 | 0 | 0 |
| Crossroads Church & School | Elizabethtown | 50 | 0 | 0 |
| Crosley State Fish & Wildlife | North Vernon | 32 | 0 | 0 |
| Muscatatuck Urban Training Center | Butlerville | 30 | 0 | 0 |