MITCHELL, SD · Davison County
MILLBROOK COLONY Water System
Inactive system
This water system is marked inactive in EPA’s federal records as of May 1, 2000. 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 Davison County, SD.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 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)
- SD4602010
- System type
- Community Water System
- Population served
- 108
- Service connections
- 36
- Ownership
- privately owned
- Water source
- surface water (rivers, lakes, or reservoirs)
MILLBROOK COLONY is one of 583 community water systems in South Dakota in the 500 or fewer people size category, formerly serving 108 people from surface water.
EPA's federal records list this system as inactive in 2000; the record below is historical.
As of August 1, 2026, its federal record holds 14 entries between 1993 and 1999, all of which EPA lists as closed. Nothing has been added since 1999.
Of the 14, 13 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves volatile organic chemicals, the Total Coliform Rules, and inorganic chemicals.
Violation history
Monitoring, Regular
—o-Dichlorobenzene
April 1, 1999 – June 30, 1999
ArchivedMonitoring, Regular
—1,1,2-Trichloroethane
April 1, 1999 – June 30, 1999
ArchivedMonitoring, Regular
—1,1,2-Trichloroethane
January 1, 1999 – March 31, 1999
ArchivedMonitoring, Regular
—Styrene
January 1, 1999 – March 31, 1999
ArchivedMonitoring, Regular
—Carbon tetrachloride
January 1, 1999 – March 31, 1999
ArchivedMonitoring, Regular
—1,2-Dichloropropane
July 1, 1998 – September 30, 1998
ResolvedMonitoring, Regular
—Toluene
July 1, 1998 – September 30, 1998
ResolvedMonitoring, Regular
—1,1,1-Trichloroethane
April 1, 1998 – June 30, 1998
ResolvedMonitoring, Regular
—Xylenes, Total
April 1, 1998 – June 30, 1998
ResolvedMonitoring, Regular
—trans-1,2-Dichloroethylene
April 1, 1998 – June 30, 1998
ResolvedMonitoring, Regular
—CHLOROBENZENE
January 1, 1998 – March 31, 1998
ResolvedMonitoring, Regular
—1,1-Dichloroethylene
January 1, 1998 – March 31, 1998
ResolvedNotification, Public
—Coliform (TCR)
March 8, 1997 – April 7, 1997
ArchivedMonitoring, Regular
—Nitrite
January 1, 1993 – December 31, 1995
Resolved
Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| April 1, 1999 – June 30, 1999 | Monitoring, Regular | o-Dichlorobenzene | — | Archived |
| April 1, 1999 – June 30, 1999 | Monitoring, Regular | 1,1,2-Trichloroethane | — | Archived |
| January 1, 1999 – March 31, 1999 | Monitoring, Regular | 1,1,2-Trichloroethane | — | Archived |
| January 1, 1999 – March 31, 1999 | Monitoring, Regular | Styrene | — | Archived |
| January 1, 1999 – March 31, 1999 | Monitoring, Regular | Carbon tetrachloride | — | Archived |
| July 1, 1998 – September 30, 1998 | Monitoring, Regular | 1,2-Dichloropropane | — | Resolved |
| July 1, 1998 – September 30, 1998 | Monitoring, Regular | Toluene | — | Resolved |
| April 1, 1998 – June 30, 1998 | Monitoring, Regular | 1,1,1-Trichloroethane | — | Resolved |
| April 1, 1998 – June 30, 1998 | Monitoring, Regular | Xylenes, Total | — | Resolved |
| April 1, 1998 – June 30, 1998 | Monitoring, Regular | trans-1,2-Dichloroethylene | — | Resolved |
| January 1, 1998 – March 31, 1998 | Monitoring, Regular | CHLOROBENZENE | — | Resolved |
| January 1, 1998 – March 31, 1998 | Monitoring, Regular | 1,1-Dichloroethylene | — | Resolved |
| March 8, 1997 – April 7, 1997 | Notification, Public | Coliform (TCR) | — | Archived |
| January 1, 1993 – December 31, 1995 | Monitoring, Regular | Nitrite | — | Resolved |
Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state
Enforcement actions
- August 26, 1999State Public Notification requested43 linked violations
- June 15, 1999State Public Notification issued2 linked violations
- April 8, 1997State Public Notification issued4 linked violations
- April 30, 1996State Compliance achieved63 linked violations
Last known contact on file (system is inactive)
Not on record
605-996-6639
MITCHELL, SD 573017828