Fergus County, Montana
20 active water systems in this county.
| Water System | Population Served | Source | Violations | Health-Based |
|---|---|---|---|---|
| Denton Town of | 255 | Surface Water | 166 | 155 |
| King Ranch Colony | 56 | Groundwater | 106 | 36 |
| Lewistown City of | 5,923 | Groundwater | 64 | 2 |
| The Hideaway | 26 | Groundwater | 35 | 2 |
| Winifred Town of | 274 | Groundwater | 27 | 1 |
| Ayers Hutterite Colony | 58 | Groundwater | 12 | 1 |
| Judith Shadows Golf Course | 25 | Groundwater | 8 | 1 |
| Deerfield Hutterite Colony | 51 | Groundwater | 63 | 0 |
| Hi Heat Industries Inc | 75 | Groundwater | 58 | 0 |
| Pine Meadows Golf Course Elks 456 the | 130 | Groundwater | 20 | 0 |
| Roy Water and Sewer District | 110 | Groundwater | 20 | 0 |
| Grass Range Town of | 102 | Groundwater | 18 | 0 |
| Lehrkinds Big Spring Water | 2,575 | Groundwater Purchased | 17 | 0 |
| Mountain Acres Mb Hm Pk | 320 | Groundwater Purchased | 17 | 0 |
| Moore Town of | 186 | Groundwater | 8 | 0 |
| Spring Creek Colony Lewistown | 48 | Groundwater | 6 | 0 |
| Judith Mountain Lodge Unapproved | 30 | Groundwater | 6 | 0 |
| Eddies Corner | 503 | Groundwater | 3 | 0 |
| Big Sky Grocery Unapproved | 90 | Groundwater | 2 | 0 |
| K-m Scout Ranch Water System | 325 | Groundwater | 0 | 0 |