We found 26 public water systems in Marshall county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Web Water Development Association | Aberdeen, Eureka | 14,000 | 39 | 4 |
| Brown-day-marshall Rws | Britton, Langford | 5,375 | 0 | 2 |
| Britton | Britton | 1,241 | 0 | 32 |
| Veblen | Veblen | 526 | 0 | 85 |
| Langford | Langford | 313 | 0 | 4 |
| Gfp 2-b/roy Lake-new Shop | County of Marshall | 200 | 0 | 0 |
| Sunset Colony | Aberdeen, Britton | 155 | 0 | 151 |
| Gfp 2-h/clear Lake Boat Access | County of Marshall | 125 | 0 | 0 |
| Westwood Colony | Aberdeen, Britton | 110 | 0 | 0 |
| Newport Colony | Claremont | 104 | 0 | 0 |
| Gfp 2-a/roy Lake E Campground | County of Marshall | 100 | 0 | 0 |
| Kidder Water Association | Kidder | 100 | 0 | 0 |
| Westmiller Water Association | County of Marshall | 99 | 0 | 0 |
| Eden | Eden | 89 | 0 | 0 |
| Gfp 2-o/fort Sisseton State Pa | Eden | 75 | 0 | 0 |
| Cottonwood Kitchen | County of Marshall | 75 | 0 | 0 |
| Lake City | Britton, Lake City | 51 | 0 | 0 |
| Roykota Resort Cafe | County of Marshall | 50 | 0 | 0 |
| Amherst Water Company | Amherst, Britton | 35 | 0 | 0 |
| Chinatown Bar | County of Marshall | 30 | 0 | 0 |
| Buffalo Lake Restaurant | Eden | 30 | 0 | 0 |
| Hills Drive Inn | Britton | 25 | 0 | 0 |
| Sportsman's Lodge | County of Marshall | 25 | 0 | 0 |
| Moxie S Bar | Amherst | 25 | 0 | 0 |
| Hi-horizon | Lake City | 25 | 0 | 0 |
| Clear Lake Lodge | County of Marshall | 25 | 0 | 0 |