County drinking water records
Dewey County, SD drinking water systems
5 community water systems serve Dewey County, SD, reporting 7,000 people served in all. A system that also serves other counties counts all of its customers here.
1 of them had at least one health-based violation in the last 10 years. None of those systems has one still unresolved.
2 rely mainly on groundwater and 3 on surface water, counting water bought from other systems.
Their lead service line inventories list 0 lead lines, 0 galvanized lines that must be replaced and 1,176 lines of unknown material.
- Community water systems
- 5
- People served, sum of each system's own figure
- 7,000
- Systems with a health-based violation, last 10 years
- 1
- Systems with one unresolved
- 0
- Lead service lines in inventories
- 0
Water systems serving Dewey County
5 systemsPeople served is each system's own figure for its whole service area. Violation counts cover the last 10 years of EPA records.
| System | Serves | People served | Main source | Health-based violations, 10 years | Unresolved | Lead lines |
|---|---|---|---|---|---|---|
| Eagle Butte | Eagle Butte | 4,000 | Purchased surface water | 2 | 0 | 0 |
| Tri-County Rural Water System | La Plant, North Eagle Butte and 10 more and land outside them | 2,190 | Surface water | 0 | 0 | 0 |
| Timber Lake | Timber Lake | 499 | Groundwater | 0 | 0 | 0 |
| T C & G Rural Water System | Outside cities and towns | 166 | Groundwater | 0 | 0 | 0 |
| Isabel | Isabel | 145 | Purchased surface water | 0 | 0 | 0 |
Cities and towns in Dewey County
8 places- Green Grass1 system
- Isabel2 systems
- Lantry1 system
- La Plant1 system
- North Eagle Butte1 system
- Swift Bird1 system
- Timber Lake2 systems
- Whitehorse1 system
Counties come from the counties EPA lists each system serving, matched to 2024 Census counties; where EPA lists none, from the county coded in the system's ID, its service area map, or its mailing address. A county holding at least a fifth of a system's service area map is added when at least a fifth of that map lies in those counties. Towns are the ones EPA lists and the Census places such a map covers, always inside those counties. In New England, where EPA's town names a whole Town, it is not matched to the village of the same name. A system is not listed in a county holding less than a fifth of its map, or in a county or town its map reaches when the map lies mostly outside the counties EPA lists, so a page can leave out a system that serves part of the area. Methodology and limitations