Day County, South Dakota
6 active water systems in this county.
| Water System | Population Served | Source | Violations | Health-Based |
|---|---|---|---|---|
| Bristol | 288 | Surface Water Purchased | 10 | 6 |
| Roslyn | 181 | Surface Water Purchased | 4 | 1 |
| Waubay | 473 | Groundwater | 2 | 1 |
| Grenville | 48 | Surface Water Purchased | 16 | 0 |
| Pierpont | 129 | Groundwater Purchased | 4 | 0 |
| Webster | 1,696 | Surface Water Purchased | 1 | 0 |