Public water system record
Sioux Rural Water System
Serves an area of Hamlin County, Codington County and 2 more counties, SD that includes Watertown, Goodwin, Waverly and 8 more places · 4,280 people served
Federal records show 1 health-based violation and 3 monitoring/reporting issues for Sioux Rural Water System in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 1
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 3
Key facts
- Sioux Rural Water System draws water from 9 wells.
- Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit), 2020.
- Lead pipe inventory: 0 lead and 0 unknown out of 1,629 service lines.
Check whether Sioux Rural Water System serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
220 | Apr 1, 2020 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Combined Uranium
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
What the violations mean
Total Trihalomethanes (TTHMs)
1 incidentDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
Where the water comes from
Sioux Rural Water System draws water from 9 wells. 4 other community water systems buy water from Sioux Rural Water System.
Community systems that buy water from it
- Bryant Bryant, SD
- Castlewood Castlewood, SD
- Estelline Estelline, SD
- Hayti Hayti, SD
Annual water quality report
Sioux Rural Water System must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by South Dakota.
Certified drinking water labs by state EPA guidance for private wells