We found 16 public water systems that could serve the same population as Navistar Proving Grounds (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| New Carlisle Water Works | New Carlisle | 1,861 | 0 | 15 |
| St Stanislaus Cath Church | New Carlisle | 999 | 0 | 0 |
| Craft Station | New Carlisle | 405 | 0 | 40 |
| Hamilton Grove | New Carlisle | 384 | 0 | 38 |
| New Carlisle Wesleyan Church | New Carlisle | 260 | 0 | 15 |
| Unifrax Corporation | New Carlisle | 167 | 0 | 1 |
| Spicer Lake County Park | New Carlisle | 102 | 0 | 0 |
| Mini-mountain Campground-east | New Carlisle | 100 | 0 | 0 |
| I/n Tek Water, Town Of New Carlisle | New Carlisle | 100 | 0 | 0 |
| St. Stanislaus Church | New Carlisle | 90 | 0 | 0 |
| St. Stanislaus Church Hall | New Carlisle | 90 | 0 | 0 |
| Carris Reels | New Carlisle | 58 | 0 | 0 |
| Prairie Gardens Christian Church | New Carlisle | 45 | 0 | 0 |
| Mini Mountain Campground - North | New Carlisle | 40 | 0 | 0 |
| Bosch Automotive Improving Grounds-west | New Carlisle | 39 | 0 | 0 |
| Mini Mountain Campground-south | New Carlisle | 30 | 0 | 0 |