We found 47 public water systems that could serve the same population as Piedmont (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Chapel Lane Water Company | Piedmont, Rapid City | 1,200 | 0 | 4 |
| Northdale Sanitary District | Black Hawk, Piedmont | 1,075 | 0 | 4 |
| Wonderland Homes | Piedmont | 750 | 0 | 12 |
| Blucksberg Mtn Water Association | Piedmont, Sturgis | 528 | 0 | 19 |
| Sun Valley Development | Piedmont, Rapid City | 385 | 0 | 1 |
| Powder House Lodge | Keystone, Piedmont | 300 | 0 | 5 |
| Stagebarn Sanitary District | Black Hawk, Piedmont, Rapid City | 293 | 0 | 24 |
| Carriage Hills | Piedmont, Rapid City | 267 | 0 | 5 |
| Trail West Sanitary District | Black Hawk, Piedmont | 260 | 0 | 0 |
| Rainbow Water Company | Piedmont | 258 | 0 | 0 |
| Plainsview Mobile Manor | Box Elder, Orangevale, Piedmont | 210 | 0 | 119 |
| Boulder Park Water Users Association | Piedmont, Sturgis | 200 | 0 | 35 |
| Oaks Water Users Association | Piedmont, Rapid City | 180 | 0 | 65 |
| Westberry Trails Water Users Assoc | Piedmont, Rapid City | 152 | 0 | 75 |
| Elk Creek Steakhouse | Piedmont | 150 | 0 | 14 |
| Sunset Ranch | Piedmont, Rapid City | 150 | 0 | 23 |
| B & J Mobile Home Park | Piedmont | 135 | 0 | 2 |
| Midland Heights | Black Hawk, Piedmont | 130 | 0 | 11 |
| Pleasant Valley Homeowners Associati | Piedmont, Strugis, Sturgis | 122 | 0 | 0 |
| Rolling Dice Subdivision | Piedmont | 120 | 0 | 0 |
| East Ridge Acres | Black Hawk, Piedmont | 115 | 0 | 0 |
| Elk Creek Village | Piedmont | 110 | 0 | 0 |
| Black Hills Children's Home | Piedmont, Rapid City, Sioux Falls | 95 | 0 | 0 |
| Elk Creek Resort | Piedmont | 90 | 0 | 0 |
| Whispering Willows | Black Hawk, Piedmont | 90 | 0 | 0 |
| Spring Canyon Water Company | Piedmont, Rapid City | 89 | 0 | 0 |
| Creative Kids Too Preschool & Daycar | Piedmont, Rapid City | 87 | 0 | 0 |
| Timberwood Park Estates | Piedmont, Rapid City | 75 | 0 | 0 |
| Terra Cotta Estates | Piedmont, Rapid City | 75 | 0 | 0 |
| Gas Light | Piedmont, Rockerville | 75 | 0 | 0 |
| Crooked Oaks Canyon Homeowners | Black Hawk, Piedmont | 75 | 0 | 0 |
| Autumn Meadows Sanitary District | Black Hawk, Piedmont | 68 | 0 | 0 |
| Rimrock Highland Estates Comm Assoc | Piedmont, Rapid City | 68 | 0 | 0 |
| Sheridan Lake Highlands | Piedmont, Rapid City | 66 | 0 | 0 |
| Horseshoe Water Company | Piedmont | 65 | 0 | 0 |
| Copper Oaks I | Piedmont, Rapid City | 64 | 0 | 0 |
| Elk Valley Ranchettes | Piedmont, Rapid City | 62 | 0 | 0 |
| Cavalry Trails Homeowner Association | Piedmont, Rapid City | 55 | 0 | 0 |
| Piedmont Preschool & Child Care | Piedmont | 55 | 0 | 0 |
| Golden Hills Homes | Piedmont, Rapid City | 47 | 0 | 0 |
| Pine Cone Estates | Piedmont, Sturgis | 42 | 0 | 0 |
| Sacora Mobile Home Park | Piedmont, Sturgis | 42 | 0 | 0 |
| Lofty Pines Ii | Piedmont | 38 | 0 | 0 |
| Slash J Saloon | Piedmont | 31 | 0 | 0 |
| Cedar Gulch Ii | Piedmont, Rapid City | 27 | 0 | 0 |
| Pineview Water Association | Piedmont, Rapid City | 25 | 0 | 0 |
| Ponderosa Water Company | Piedmont, Rapid City | 25 | 0 | 0 |