Water quality in Mercer Island, South Dakota
Mercer Island 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 |
|---|---|---|---|---|
| Highland Hills Rapid City |
38 | 1 | 1.4 mi | |
| Colonial Pine Hills Sanitary Distric Rapid City |
1,200 | 0 | 1.9 mi | |
| Hart Ranch Rapid City |
468 | 0 | 2.3 mi | |
| Ponderosa Park Rapid City |
50 | 0 | 2.6 mi | |
| Spring Canyon Water Company Piedmont, Rapid City |
92 | 0 | 2.7 mi | |
| Oaks Water Users Association New Underwood |
180 | 0 | 2.8 mi | |
| Strato Rim Estates Water Company Rapid City |
170 | 0 | 3.3 mi | |
| Whispering Pines Water Association Rapid City |
48 | 0 | 3.7 mi | |
| Carriage Hills Rapid City |
267 | 0 | 3.8 mi | |
| Pineview Water Association Rapid City |
25 | 0 | 4.0 mi | |
| Ponderosa Water Company Rapid City |
25 | 0 | 4.1 mi | |
| Pine Grove Rapid City |
425 | 0 | 4.2 mi | |
| High Sheridan Ranch Black Hawk, Rapid City |
38 | 0 | 4.5 mi | |
| Chapel Lane Water Company Rapid City |
1,200 | 0 | 4.6 mi | |
| Golden Hills Homes Rapid City |
47 | 0 | 4.7 mi | |
| Rimrock Ridge Water Association Rapid City |
35 | 0 | 4.7 mi | |
| The Ranch at Black Gap Rapid City |
375 | 0 | 4.9 mi | |
| Sheridan Lake Highlands, Inc. Piedmont, Rapid City |
85 | 0 | 5.1 mi | |
| Rapid City Rapid City |
72,009 | 0 | 6.0 mi | |
| Happy Holiday Water Association Rapid City |
35 | 1 | 6.2 mi | |
| Rimrock Heights Homeowners Associati Rapid City |
35 | 0 | 6.2 mi | |
| Darlington Estates Rapid City |
25 | 2 | 6.2 mi | |
| Westberry Trails Water Users Assoc Piedmont, Rapid City |
155 | 0 | 7.1 mi | |
| Rapid Valley Sanitary District Rapid City |
11,408 | 0 | 7.8 mi | |
| Ponderosa Ridge Rapid City |
98 | 1 | 7.8 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 |
|---|---|---|---|---|
|
Shipwrecks Bar and Grill Rapid City |
35 | 2 | 2 | |
|
Reptile Gardens INC Rapid City |
1,169 | 0 | 0 | |
|
Dinosaur Museum Rapid City |
500 | 2 | 2 | |
|
Rushmore Candy Company Rapid City |
90 | 3 | 2 | |
|
Rapid City South RV Park Black Hawk, Rapid City |
440 | 0 | 0 | |
|
Bear Country USA Black Hawk, Rapid City |
1,021 | 0 | 0 | |
|
Athletic Club of the Black Hills Rapid City |
100 | 1 | 1 | |
|
Htr Black Hills Resorts Rapid City |
180 | 1 | 1 | |
|
Rapid City RV Park and CG Rapid City |
236 | 0 | 0 | |
|
Chapel in the Hills Rapid City |
200 | 1 | 1 | |
|
Pine Haven Venue and Lodging Black Hawk, Rapid City, Wall |
128 | 0 | 0 | |
|
Lake Park Campground Rapid City |
65 | 0 | 0 | |
|
Canyon Lake Resort Rapid City |
60 | 2 | 0 | |
|
Rockerville Motel and Cabins Rapid City |
45 | 0 | 0 | |
|
Rockerville Gold Nugget Lodge Rapid City |
52 | 0 | 0 | |
|
The Gaslight Rapid City, Rockerville |
300 | 0 | 0 | |
|
Cedar Canyon Wesleyan Camp Rapid City |
62 | 1 | 0 | |
|
Storm Mountain Center Mitchell, Rapid City |
80 | 1 | 1 | |
|
Happy Trails Homeowners Black Hawk, Rapid City |
54 | 1 | 0 | |
|
Silver Mountain Cabins Rapid City |
29 | 0 | 0 | |
|
Gcc Dacotah East/west/north Rapid City |
100 | 0 | 0 | |
|
Hillside Country Cabins Rapid City |
54 | 1 | 1 | |
|
Gcc Dacotah-North Quarry Well Rapid City |
35 | 0 | 0 | |
|
Black Hills Children's Home Rapid City, Sioux Falls |
105 | 0 | 0 | |
|
Coca Cola Bottling CO Rapid City |
75 | 0 | 0 | |
|
Salvation Army Camp Rapid City |
25 | 0 | 0 | |
|
Rush Mountain Adventure Park Keystone |
300 | 0 | 0 | |
|
Rushmore Mountain Coaster Keystone |
300 | 0 | 0 | |
|
Cosmos Mystery Area Columbus, Rapid City |
600 | 0 | 0 | |
|
Blue Wing Recreation Area Hill City, Rapid City |
200 | 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 | |
|
Powder House Lodge Keystone, Rapid City |
700 | 0 | 0 | |
|
Holy Smoke Cabins Keystone |
37 | 0 | 0 | |
|
Usfs-Bhnf Chipper/thumper CG Black Hawk, Custer, Overland Park |
56 | 0 | 0 | |
|
Rustic Ridge Guest Cabins Keystone |
25 | 0 | 0 | |
|
Kemp's Kamp East Keystone |
100 | 0 | 0 | |
|
Rimrock Tavern Lyndon Bolt Boxelder |
35 | 3 | 1 | |
|
Kemp's Kamp West Keystone |
68 | 0 | 0 | |
|
Kemp's Kamp Upper Keystone |
30 | 0 | 0 | |
|
Kemp's Kamp Middle Keystone |
25 | 0 | 0 | |
|
Rushmore Tramway Adventures Keystone |
200 | 1 | 1 | |
|
Horse Creek Resort-Lower Wells Rapid City |
90 | 0 | 0 | |
|
Horse Creek Resort-Log Cabin Well Rapid City |
35 | 0 | 0 | |
|
American Pines Cabins Keystone |
40 | 3 | 0 | |
|
Black Hawk Creek RV Park Black Hawk, Rapid City |
158 | 0 | 0 | |
|
Rushmore Under Canvas Black Hawk, Bozeman, Keystone |
113 | 0 | 0 | |
|
Placerville Camp Rapid City |
84 | 1 | 1 | |
|
Camp Judson Keystone, Sioux Falls |
100 | 2 | 1 | |
|
Nps-Mount Rushmore National Memorial Keystone |
4,100 | 0 | 0 |
About this data
Water systems are matched to Pennington County, nearest to Mercer Island 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.