COUNTY WATER-SYSTEM LEDGER
Union, South Dakota
EPA’s September 2026 export lists 4 active community water systems serving Union, South Dakota, with 0 current-violation flags and 0 serious-violator flags among the covered systems.
Source: EPA SDWIS system-search export · Active community systems serving 2,500+ people · Snapshot 13 Sep 2026
01 / SYSTEMS
Water systems serving Union, South Dakota
EPA associates 4 covered systems with Union, South Dakota; their reported population-served values total 16,772 and may overlap.
Ordered by reported population served. Open any record for separate health, monitoring, notice, other, and serious-violator flags.
| Water system | Population served | Primary source | Current export status |
|---|---|---|---|
| South Lincoln Rural Water SystemSD4600870 | 5,250 | Ground water | No current violation flagged |
| Clay Rural Water SystemSD4600626 | 4,780 | Ground water | No current violation flagged |
| Dakota Dunes CidSD4602093 | 3,700 | Purchased ground water under influence of surface water source | No current violation flagged |
| North Sioux CitySD4600226 | 3,042 | Ground water | No current violation flagged |
02 / SOURCE MIX
Primary water sources for Union, South Dakota
EPA classifies 4 systems serving Union, South Dakota across 2 primary-source categories; Ground water is the largest category with 3 systems.
It is the sum of each listed system's reported population served, not a census estimate. Service areas can overlap and some systems list multiple cities or counties.