Water quality for ZIP code 57779
ZIP 57779 covers St. Onge in Lawrence County, South Dakota, one of 7 ZIP codes in the county. 74 active public water systems serve the county; 15 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Lawrence County
41 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Walnut Park Spearfish |
180 | 1 | 5.2 mi | |
| Spring Creek Preserve Spearfish |
68 | 1 | 5.2 mi | |
| Sunrise Homeowners Association Spearfish |
50 | 0 | 5.3 mi | |
| Chris' Mobile Home Court Spearfish |
25 | 0 | 5.9 mi | |
| Bicentennial Trailer Court Spearfish |
23 | 1 | 6.6 mi | |
| Lourie Lane Homeowners Assoc Spearfish |
75 | 0 | 6.8 mi | |
| Lantern Estates Spearfish, Whitewood |
192 | 0 | 6.9 mi | |
| Spearfish Spearfish |
13,803 | 0 | 7.0 mi | |
| D & E Water Company Black Hawk, Spearfish |
100 | 0 | 7.2 mi | |
| Ken's Trailer Court Spearfish |
110 | 0 | 7.2 mi | |
| Spearfish Valley Mobile Estates Spearfish |
163 | 1 | 7.2 mi | |
| Spearfish Meadows Rapid City, Spearfish |
87 | 0 | 7.3 mi | |
| Deberg Well Users Association Spearfish |
54 | 0 | 8.1 mi | |
| Centennial Hills Home Association Spearfish |
25 | 0 | 8.1 mi | |
| Westview Homeowners Association Spearfish |
103 | 0 | 8.2 mi | |
| Whitewood Forest Acres Whitewood |
160 | 1 | 8.3 mi | |
| Westfield Addition Spearfish |
104 | 0 | 8.3 mi | |
| Mountain Plains 2 Homeowners Assoc Spearfish |
268 | 3 | 8.9 mi | |
| Wild Turkey Estates I Black Hawk, Spearfish |
33 | 0 | 9.1 mi | |
| Wild Turkey Estates II Black Hawk, Spearfish |
70 | 0 | 9.5 mi | |
| The Timbers Black Hawk, Spearfish |
33 | 0 | 10.9 mi | |
| Paradise Water Company LLC Lead, Sioux Falls |
178 | 0 | 11.5 mi | |
| Whitewood Whitewood |
879 | 0 | 11.5 mi | |
| Shirt Tail Gulch Development Black Hawk, Sturgis |
65 | 0 | 12.2 mi | |
| 76 Ranch Estates Black Hawk, Sturgis |
40 | 0 | 12.3 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, the county this ZIP code lies in, nearest to the ZIP code's centre 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.
ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA 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.