WESTPORT, SD · Brown County
GRASSLAND COLONY Water System
Inactive system
This water system is marked inactive in EPA’s federal records as of August 1, 2025. 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 Brown 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)
- SD4602028
- System type
- Community Water System
- Population served
- 130
- Service connections
- 30
- Ownership
- privately owned
- Water source
- surface water (rivers, lakes, or reservoirs)
Violation history
Monitoring, Regular
—DICHLOROMETHANE
January 1, 1996 – December 31, 1996
ResolvedMonitoring, Regular
—Toluene
January 1, 1996 – December 31, 1996
ResolvedMonitoring, Regular
—Aldicarb
January 1, 1993 – December 31, 1995
ResolvedMonitoring, Regular
—Gross Alpha, Excl. Radon and U
November 5, 1990 – November 4, 1994
ResolvedMonitoring, Regular
—Combined Radium (-226 and -228)
November 5, 1990 – November 4, 1994
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 1996 – December 31, 1996 | Monitoring, Regular | DICHLOROMETHANE | — | Resolved |
| January 1, 1996 – December 31, 1996 | Monitoring, Regular | Toluene | — | Resolved |
| January 1, 1993 – December 31, 1995 | Monitoring, Regular | Aldicarb | — | Resolved |
| November 5, 1990 – November 4, 1994 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | Resolved |
| November 5, 1990 – November 4, 1994 | Monitoring, Regular | Combined Radium (-226 and -228) | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- February 16, 2010State Compliance achieved5 linked violations
- February 1, 2004State Compliance achieved1 linked violation
- July 23, 2003State Public Notification received2 linked violations
- October 1, 2000State Compliance achieved1 linked violation
- April 18, 2000State Public Notification received1 linked violation
- September 30, 1998State Compliance achieved35 linked violations
- November 17, 1997State Administrative/Compliance Order without penalty issued35 linked violations
- July 24, 1997State Compliance achieved9 linked violations
- March 1, 1997State Compliance achieved2 linked violations
- February 3, 1997State Intentional no-action3 linked violations
- October 28, 1996State Public Notification received24 linked violations
- October 22, 1996State Public Notification requested7 linked violations
- April 24, 1996State Intentional no-action2 linked violations
Last known contact on file (system is inactive)
GRASSLAND COLONY
6054393603
WESTPORT, SD 57481