We found 33 public water systems that could serve the same population as Gayville (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| YANKTON | Yankton | 14,700 | 46 | 28 |
| Bon Homme-yankton Rws | Avon, Tabor | 11,862 | 40 | 5 |
| Bon Homme-yankton I Rws | County of Yankton | 5,790 | 0 | 0 |
| Chief White Crane Camping Area | County of Yankton | 420 | 0 | 0 |
| Irene | Irene | 420 | 0 | 15 |
| Coe-l&c/chief White Crane Rec Area | County of Yankton | 280 | 0 | 0 |
| Pierson Ranch Rec Area | County of Yankton | 275 | 0 | 0 |
| Human Service Center | County of Yankton | 200 | 0 | 0 |
| Coe-l&c/south Cottonwood Cg | County of Yankton | 200 | 0 | 0 |
| East Winds Court, Inc. | Mission Hill, Yankton | 180 | 0 | 10 |
| Mission Hill | Mission Hill, Yankton | 177 | 0 | 18 |
| Volin | Volin | 161 | 0 | 10 |
| Gfp 8-b/gavins Point Swim Area | County of Yankton | 150 | 0 | 0 |
| Riverside Acres | County of Yankton | 140 | 0 | 0 |
| Timberland Park | Yankton | 140 | 0 | 73 |
| Coe-l&c/north Cottonwood Cg | County of Yankton | 139 | 0 | 0 |
| Lesterville | Lesterville | 127 | 0 | 25 |
| Jamesville Colony | Aberdeen, Utica | 120 | 0 | 0 |
| Green Briar Court | County of Yankton | 120 | 0 | 0 |
| Cottonwood Camping Area | County of Yankton | 110 | 0 | 0 |
| Fairview Heights, C/o M.miller | Yankton | 75 | 0 | 0 |
| Country Acres Mhp | Yankton | 70 | 0 | 0 |
| Lewis And Clark Water Co | County of Yankton | 70 | 0 | 0 |
| Utica | Utica, Yankton | 65 | 0 | 0 |
| Red Wagon Trailer Court | County of Yankton | 65 | 0 | 0 |
| Coe-l&c/training Dike Campground | County of Yankton | 60 | 0 | 0 |
| Northern Lights Mobile Home Park | Yankton | 57 | 0 | 0 |
| Stockmen's Livestock Cafe | County of Yankton | 45 | 0 | 0 |
| Sunrise Mobile Home Park | Yankton | 33 | 0 | 0 |
| Gfp 8-3/tabor Recreation Area | County of Yankton | 25 | 0 | 0 |
| Coe-l&c/pierson Ranch Campground | County of Yankton | 25 | 0 | 0 |
| Gfp 8-a/tabor Access Area | County of Yankton | 2 | 0 | 0 |
| Mayer Builders | County of Yankton | 0 | 0 | 0 |