South Dakota
Yankton County drinking water quality
11 active public water systems serve 30,690 people in Yankton County. 7 are compliant, 4 had at least one EPA violation in the past three years, 0 are designated serious violators, and 0 carry a health flag.
Community water systems
10 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Yankton Yankton |
15,411 | 0 | 0 | |
|
BY Water District Avon, Tabor |
13,320 | 0 | 0 | |
|
Irene Irene |
422 | 0 | 0 | |
|
Gayville Gayville |
392 | 0 | 0 | |
|
Mission Hill Gayville, Mission Hill |
190 | 0 | 0 | |
|
East Winds Court, Inc. Yankton |
180 | 0 | 0 | |
|
Volin Volin |
161 | 0 | 0 | |
|
Lesterville Lesterville |
115 | 1 | 0 | |
|
Timberland Park Yankton |
95 | 2 | 1 | |
|
Utica Gayville, Utica |
65 | 1 | 0 |
Non-community systems (1: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
3 Sons RV Park Yankton |
339 | 1 | 0 |
Inactive systems (24, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
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.