Water quality in St. Onge, South Dakota
St. Onge is in Lawrence County. 74 active public water systems serve the county; 15 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 Lawrence County
41 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Walnut Park Spearfish |
180 | 1 | 4.6 mi | |
| Sunrise Homeowners Association Spearfish |
50 | 0 | 4.6 mi | |
| Spearfish Meadows Rapid City, Spearfish |
87 | 0 | 5.1 mi | |
| Whitewood Forest Acres Whitewood |
160 | 1 | 5.9 mi | |
| Chris' Mobile Home Court Spearfish |
25 | 0 | 6.0 mi | |
| Spring Creek Preserve Spearfish |
68 | 1 | 6.6 mi | |
| Centennial Hills Home Association Spearfish |
25 | 0 | 7.1 mi | |
| Spearfish Spearfish |
13,803 | 0 | 7.6 mi | |
| Bicentennial Trailer Court Spearfish |
23 | 1 | 7.7 mi | |
| Lantern Estates Spearfish, Whitewood |
192 | 0 | 8.0 mi | |
| Lourie Lane Homeowners Assoc Spearfish |
75 | 0 | 8.0 mi | |
| Ken's Trailer Court Spearfish |
110 | 0 | 8.2 mi | |
| D & E Water Company Black Hawk, Spearfish |
100 | 0 | 8.2 mi | |
| Spearfish Valley Mobile Estates Spearfish |
163 | 1 | 8.5 mi | |
| Whitewood Whitewood |
879 | 0 | 9.1 mi | |
| Mountain Plains 2 Homeowners Assoc Spearfish |
268 | 3 | 9.2 mi | |
| Deberg Well Users Association Spearfish |
54 | 0 | 9.2 mi | |
| Westfield Addition Spearfish |
104 | 0 | 9.3 mi | |
| Westview Homeowners Association Spearfish |
103 | 0 | 9.7 mi | |
| 76 Ranch Estates Black Hawk, Sturgis |
40 | 0 | 10.3 mi | |
| Meadow Crest Sanitary District Deadwood, Spearfish |
63 | 0 | 10.3 mi | |
| Shirt Tail Gulch Development Black Hawk, Sturgis |
65 | 0 | 10.3 mi | |
| Paradise Water Company LLC Lead, Sioux Falls |
178 | 0 | 10.4 mi | |
| Oak Mountain Country Estates Black Hawk, Deadwood |
85 | 0 | 10.4 mi | |
| Wild Turkey Estates I Black Hawk, Spearfish |
33 | 0 | 10.5 mi |
Non-community systems in Lawrence County (32: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Lawrence County, nearest to St. Onge 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 ZIP code EPA lists the system as serving, from Census Bureau ZCTA 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.