Water quality in Keystone, South Dakota
Keystone is in Pennington County. 158 active public water systems serve the county; 52 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in Pennington County
66 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Golden Hills Homes Rapid City |
47 | 0 | 6.0 mi | |
| Rushmore Ranch Estates Black Hawk, Hot Springs |
168 | 0 | 6.2 mi | |
| Pine Grove Rapid City |
425 | 0 | 7.2 mi | |
| Strato Rim Estates Water Company Rapid City |
170 | 0 | 7.5 mi | |
| Hill City Hill City |
872 | 0 | 7.6 mi | |
| Sheridan Lake Highlands, Inc. Piedmont, Rapid City |
85 | 0 | 7.9 mi | |
| Oaks Water Users Association New Underwood |
180 | 0 | 8.3 mi | |
| High Sheridan Ranch Black Hawk, Rapid City |
38 | 0 | 8.6 mi | |
| Spring Canyon Water Company Piedmont, Rapid City |
92 | 0 | 8.8 mi | |
| Whispering Pines Water Association Rapid City |
48 | 0 | 9.3 mi | |
| Ponderosa Park Rapid City |
50 | 0 | 9.7 mi | |
| Highland Hills Rapid City |
38 | 1 | 10.2 mi | |
| Colonial Pine Hills Sanitary Distric Rapid City |
1,200 | 0 | 10.2 mi | |
| Happy Holiday RV Resort Mercer Island, Rapid City |
264 | 0 | 10.6 mi | |
| Hart Ranch Rapid City |
468 | 0 | 11.4 mi | |
| Edelweiss Mountain Improvement Assoc Black Hawk, Rapid City |
70 | 0 | 11.5 mi | |
| Hisega Meadows Water INC Rapid City |
493 | 0 | 12.0 mi | |
| Rimrock Ridge Water Association Rapid City |
35 | 0 | 12.1 mi | |
| Carriage Hills Rapid City |
267 | 0 | 12.5 mi | |
| Siphon Hill Water Association Rapid City |
68 | 0 | 12.9 mi | |
| Chapel Lane Water Company Rapid City |
1,200 | 0 | 13.0 mi | |
| Pineview Water Association Rapid City |
25 | 0 | 13.0 mi | |
| Ponderosa Water Company Rapid City |
25 | 0 | 13.2 mi | |
| Pine Cliff Estates Black Hawk, Rapid City |
180 | 0 | 13.5 mi | |
| High Meadows Ranchettes Black Hawk, Rapid City |
60 | 0 | 14.1 mi |
Non-community systems in Pennington County (91: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Rushmore Tramway Adventures Keystone |
200 | 1 | 1 | |
|
Kemp's Kamp East Keystone |
100 | 0 | 0 | |
|
Nps-Mount Rushmore National Memorial Keystone |
4,100 | 0 | 0 | |
|
Rushmore Under Canvas Black Hawk, Bozeman, Keystone |
113 | 0 | 0 | |
|
Kemp's Kamp West Keystone |
68 | 0 | 0 | |
|
Kemp's Kamp Upper Keystone |
30 | 0 | 0 | |
|
Kemp's Kamp Middle Keystone |
25 | 0 | 0 | |
|
Powder House Lodge Keystone, Rapid City |
700 | 0 | 0 | |
|
American Pines Cabins Keystone |
40 | 3 | 0 | |
|
Holy Smoke Cabins Keystone |
37 | 0 | 0 | |
|
Camp Judson Keystone, Sioux Falls |
100 | 2 | 1 | |
|
Cosmos Mystery Area Columbus, Rapid City |
600 | 0 | 0 | |
|
Rustic Ridge Guest Cabins Keystone |
25 | 0 | 0 | |
|
Usfs-Bhnf Horsethief Lake CG Black Hawk, Custer, Overland Park |
79 | 0 | 0 | |
|
Black Hills Children's Home Rapid City, Sioux Falls |
105 | 0 | 0 | |
|
Hillside Country Cabins Rapid City |
54 | 1 | 1 | |
|
Silver Mountain Cabins Rapid City |
29 | 0 | 0 | |
|
Blue Wing Recreation Area Hill City, Rapid City |
200 | 0 | 0 | |
|
Black Elk Resort Rapid City |
38 | 0 | 0 | |
|
Rush Mountain Adventure Park Keystone |
300 | 0 | 0 | |
|
Rushmore Mountain Coaster Keystone |
300 | 0 | 0 | |
|
Freedom Ridge Cabins Hill City |
29 | 0 | 0 | |
|
Usfs-Bhnf Chipper/thumper CG Black Hawk, Custer, Overland Park |
56 | 0 | 0 | |
|
Palmer Gulch Lodge/mt Rushmore KOA Black Hawk, Hill City |
850 | 0 | 0 | |
|
Creekside LLC Hill City |
235 | 2 | 0 | |
|
Storm Mountain Center Mitchell, Rapid City |
80 | 1 | 1 | |
|
The Gaslight Rapid City, Rockerville |
300 | 0 | 0 | |
|
Country Store at Three Forks Black Hawk, Hill City, Rapid City |
1,000 | 0 | 0 | |
|
Three Forks Campground and RV Park Hill City |
122 | 2 | 2 | |
|
Rockerville Motel and Cabins Rapid City |
45 | 0 | 0 | |
|
Rockerville Gold Nugget Lodge Rapid City |
52 | 0 | 0 | |
|
Sawtooth Campground and Cabins Hill City |
45 | 1 | 0 | |
|
Addie Camp Water and Septic Piedmont |
900 | 0 | 0 | |
|
Pine Haven Venue and Lodging Black Hawk, Rapid City, Wall |
128 | 0 | 0 | |
|
Firehouse Campground Hill City, Rapid City |
45 | 0 | 0 | |
|
Usfs-Bhnf Woodsy/smokey CG Black Hawk, Custer, Overland Park |
145 | 0 | 0 | |
|
Usfs-Bhnf Rocky Campground Black Hawk, Custer, Overland Park |
41 | 0 | 0 | |
|
Prairie Dog Taproom Hill City |
75 | 3 | 1 | |
|
Robin's Roost Cabins Hill City |
34 | 2 | 1 | |
|
Spring Creek Inn Hill City |
72 | 2 | 0 | |
|
Hill City Visitor Center Hill City |
38 | 0 | 0 | |
|
Horse Creek Resort-Lower Wells Rapid City |
90 | 0 | 0 | |
|
Horse Creek Resort-Log Cabin Well Rapid City |
35 | 0 | 0 | |
|
Mountain View Lodge Hill City |
34 | 2 | 1 | |
|
KOA Hill City/needles Highway Black Hawk, Custer |
146 | 1 | 1 | |
|
Black Hills Cabins and Motel @ Quail Hill City |
56 | 1 | 1 | |
|
Silver Dollar Saloon Hill City |
50 | 2 | 1 | |
|
Timber Haven Cabins Keystone |
25 | 1 | 0 | |
|
Larsson's Crooked Creek Cg-North Wel Black Hawk, Hill City |
124 | 1 | 1 | |
|
Larsson's Crooked Creek Cg-South Wel Black Hawk, Hill City |
52 | 1 | 1 |
About this data
Water systems are matched to Pennington County, nearest to Keystone first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau place files or the centre of the first town EPA lists the system as serving, from Census Bureau county subdivision files.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The South Dakota records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.