ALEXANDRIA, SD · Hanson County
ROCKPORT COLONY Water System
Inactive system
This water system is marked inactive in EPA’s federal records as of February 1, 1996. 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 Hanson 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)
- SD4602014
- System type
- Community Water System
- Population served
- 101
- Service connections
- 20
- Ownership
- privately owned
- Water source
- surface water (rivers, lakes, or reservoirs)
ROCKPORT COLONY is one of 583 community water systems in South Dakota in the 500 or fewer people size category, formerly serving 101 people from surface water.
EPA's federal records list this system as inactive in 1996; the record below is historical.
As of August 1, 2026, its federal record holds 6 entries between 1988 and 1994, all of which EPA lists as closed. Nothing has been added since 1994.
All 6 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 and inorganic chemicals.
Violation history
Monitoring, Regular
—Vinyl chloride
January 1, 1994 – December 31, 1994
ArchivedMonitoring, Regular
—1,2,4-Trichlorobenzene
January 1, 1994 – December 31, 1994
ArchivedMonitoring, Regular
—Xylenes, Total
January 1, 1994 – December 31, 1994
ArchivedMonitoring, Regular
—o-Dichlorobenzene
January 1, 1994 – December 31, 1994
ArchivedMonitoring, Regular
—1,2-Dichloropropane
January 1, 1993 – December 31, 1993
ResolvedMonitoring, Regular
—Nitrate
January 1, 1988 – December 31, 1990
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 |
|---|---|---|---|---|
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Vinyl chloride | — | Archived |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | 1,2,4-Trichlorobenzene | — | Archived |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | Xylenes, Total | — | Archived |
| January 1, 1994 – December 31, 1994 | Monitoring, Regular | o-Dichlorobenzene | — | Archived |
| January 1, 1993 – December 31, 1993 | Monitoring, Regular | 1,2-Dichloropropane | — | Resolved |
| January 1, 1988 – December 31, 1990 | Monitoring, Regular | Nitrate | — | Resolved |
Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state
Enforcement actions
- January 24, 1996State Public Notification requested4 linked violations
- December 13, 1995State Public Notification requested28 linked violations
- August 9, 1995State Public Notification requested36 linked violations
- March 28, 1995State Public Notification requested3 linked violations
- March 8, 1995State Public Notification requested2 linked violations
- January 27, 1995State Public Notification received2 linked violations
- January 25, 1995State Public Notification received22 linked violations
- October 20, 1994State Public Notification received12 linked violations
- September 14, 1994State Public Notification received1 linked violation
- July 14, 1994State Public Notification received3 linked violations
- February 22, 1994State Public Notification received2 linked violations
- August 17, 1993State Public Notification received33 linked violations
- July 22, 1993State Public Notification received76 linked violations
- May 5, 1993State Public Notification issued139 linked violations
- December 4, 1992State Compliance achieved2 linked violations
- February 24, 1992State Formal Notice of Violation issued47 linked violations
Last known contact on file (system is inactive)
Not on record
Phone not on record
ALEXANDRIA, SD 57311