We found 44 public water systems in Hughes county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Pierre | Pierre | 13,938 | 56 | 6 |
| Mid-dakota Rural Water | Miller, Pierre | 10,200 | 30 | 1 |
| Spring Creek Sanitary District | Pierre | 380 | 0 | 28 |
| Blunt | Blunt, Miller | 354 | 0 | 80 |
| Oahe Plains Systems Corporation | Pierre | 257 | 0 | 0 |
| Harrold | County of Hughes | 155 | 0 | 0 |
| Camelot | County of Hughes | 152 | 0 | 0 |
| Gfp-west Bend Recreation Area | Pierre | 125 | 0 | 19 |
| Dell Acres Mobile Home Park | Pierre | 100 | 0 | 0 |
| Gfp 11-j/rose Hill Rec Area | County of Hughes | 100 | 0 | 0 |
| Coe-lk O/campground #1 | County of Hughes | 100 | 0 | 0 |
| Lakeview Acres,c/o Myril Arch | County of Hughes | 100 | 0 | 0 |
| Dot Rest Area 401a - Mcintosh | County of Hughes | 100 | 0 | 0 |
| Dot Rest Area 414b-white River | County of Hughes | 100 | 0 | 0 |
| Dot Rest Area 433c-medicine Ck | County of Hughes | 100 | 0 | 0 |
| Dot Rest Area 430c - Blunt | County of Hughes | 100 | 0 | 0 |
| Dot Rest Area 431c - Hayes | County of Hughes | 100 | 0 | 0 |
| Oahe Acres | Miller, Pierre | 93 | 0 | 0 |
| Harts Trailer Park | County of Hughes | 90 | 0 | 0 |
| Coe - Lake Oahe Office | County of Hughes | 75 | 0 | 0 |
| Coe-lk O/campground #3-s/dss | County of Hughes | 75 | 0 | 0 |
| Oahe Acres | County of Hughes | 50 | 0 | 0 |
| Coe-cottonwood Springs Project | County of Hughes | 50 | 0 | 0 |
| Coe-lk O/marina Comfort Station | County of Hughes | 50 | 0 | 0 |
| Coe-lk O/campground #2-s | County of Hughes | 50 | 0 | 0 |
| Coe-lk O/little Bend Rec Area | Pierre | 50 | 0 | 0 |
| Coe-lk O/campground #2-n | County of Hughes | 50 | 0 | 0 |
| Dell Acres Residential Corporation | County of Hughes | 45 | 0 | 0 |
| Coe-lk O/revheim Park | County of Hughes | 35 | 0 | 0 |
| Sgt Water Assocation | County of Hughes | 30 | 0 | 0 |
| West Bend Elementary School | West Bend | 30 | 0 | 0 |
| Outpost Lodge | County of Hughes | 30 | 0 | 0 |
| Oahe Lodge | County of Hughes | 30 | 0 | 0 |
| Coe-lk O/maintenance Shop System | County of Hughes | 30 | 0 | 0 |
| Cattleman's Club | County of Hughes | 25 | 0 | 0 |
| Spring Creek Resort | County of Hughes | 25 | 0 | 0 |
| Coe-lko/spring Creek Rec Area | County of Hughes | 25 | 0 | 0 |
| Coe-lk S/laframboise Island | County of Hughes | 25 | 0 | 0 |
| Coe-lk O/west Pollock-n System | County of Hughes | 25 | 0 | 0 |
| Coe-lko/swan Creek L | County of Hughes | 25 | 0 | 0 |
| Coe-lk O/powerplant | County of Hughes | 25 | 0 | 0 |
| Coe-lk O/downstream Tailrace E | Pierre | 25 | 0 | 0 |
| Gfp 11-e/joe Creek Recreation Area | County of Hughes | 25 | 0 | 0 |
| Coe-lk O/cow Creek Rec Area | Pierre | 25 | 0 | 0 |