Surface Water Treatment Rule (SWTR) violations in South Dakota
12 active public water systems in South Dakota had a Surface Water Treatment Rule (SWTR) violation in the past three years, 5 of them in the latest quarter of EPA's data. What Surface Water Treatment Rule (SWTR) is and why it matters.
Systems with a Surface Water Treatment Rule (SWTR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Lower Brule Rural Water Supply System County |
1,637 | 7 | 0 | |
|
Marty Water System County |
420 | 4 | 0 | |
|
Lake Andes Tribal Housing Water System County |
264 | 4 | 0 | |
|
Wagner South Housing Water System County |
200 | 4 | 0 | |
|
Wagner North Housing Water System County |
180 | 4 | 0 | |
|
Mission Water System County |
2,500 | 4 | 0 | |
|
Crow Creek Tribal School County |
516 | 5 | 0 | |
|
Crazy Horse School County |
428 | 4 | 1 | |
|
Enemy Swim Water System County |
230 | 2 | 0 | |
|
Red Rocks Water System County |
125 | 3 | 0 | |
|
North Allen Water System County |
65 | 5 | 0 | |
|
Wolf Creek Water System County |
65 | 3 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Surface Water Treatment Rule (SWTR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Surface Water Treatment Rule (SWTR) alone.
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.