TWIN BROOKS, SD · Grant County
TWIN BROOKS Water System
Inactive system
This water system is marked inactive in EPA’s federal records as of October 1, 2015. It is no longer an operating public water system under this PWSID, and no compliance deadlines — including the 2027 Consumer Confidence Report rule — apply to it.
If you are a resident looking for your current water provider, see water systems in Grant County, SD.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace South Dakota’s official records. Always confirm current status with South Dakota before making decisions based on this information.
System facts
- System ID (PWSID)
- SD4600336
- System type
- Community Water System
- Population served
- 69
- Service connections
- 32
- Ownership
- local government
- Water source
- groundwater (wells)
Violation history
Monitoring, Regular
—Benzene
January 1, 2006 – December 31, 2006
ResolvedMonitoring, Regular
—Trichloroethylene
January 1, 2006 – December 31, 2006
ResolvedMonitoring, Regular
—Gross Alpha, Excl. Radon and U
July 1, 1976 – June 30, 1980
ArchivedMonitoring, Regular
—Combined Radium (-226 and -228)
July 1, 1976 – June 30, 1980
Archived
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 2006 – December 31, 2006 | Monitoring, Regular | Benzene | — | Resolved |
| January 1, 2006 – December 31, 2006 | Monitoring, Regular | Trichloroethylene | — | Resolved |
| July 1, 1976 – June 30, 1980 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | Archived |
| July 1, 1976 – June 30, 1980 | Monitoring, Regular | Combined Radium (-226 and -228) | — | Archived |
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- March 6, 2014State Violation/Reminder Notice12 linked violations
- March 22, 2007State Public Notification received14 linked violations
- January 29, 2007State Compliance achieved11 linked violations
Last known contact on file (system is inactive)
TWIN BROOKS
Phone not on record
TWIN BROOKS, SD 57269