PIEDMONT, SD · Pennington County
TERRA COTTA ESTATES Water System
Inactive system
This water system is marked inactive in EPA’s federal records as of October 1, 2017. 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 Pennington 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)
- SD4602306
- System type
- Community Water System
- Population served
- 75
- Service connections
- 30
- Ownership
- privately owned
- Water source
- groundwater (wells)
TERRA COTTA ESTATES is one of 583 community water systems in South Dakota in the 500 or fewer people size category, formerly serving 75 people from groundwater.
EPA's federal records list this system as inactive in 2017; the record below is historical.
As of August 1, 2026, its federal record holds 2 entries between 2013 and 2017, all of which EPA lists as closed. Nothing has been added since 2017.
None of the 2 are monitoring or reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset; these involve water-quality, treatment, or public-notice findings instead. The record involves the Radionuclides and Revised Rad Rule and the Public Notice Rule and Revised PN Rule.
Violation history
Maximum Contaminant Level Violation, Average
Health-basedCombined Radium (-226 and -228)
January 1, 2017 – March 31, 2017
ResolvedPublic Notification Violation for NPDWR Violation
—Public Notice
March 3, 2013 – April 30, 2014
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 2017 – March 31, 2017 | Maximum Contaminant Level Violation, Average | Combined Radium (-226 and -228) | Health-based | Resolved |
| March 3, 2013 – April 30, 2014 | Public Notification Violation for NPDWR Violation | Public Notice | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- October 19, 2017State Compliance achieved66 linked violations
- October 19, 2017State Compliance achieved8 linked violations
- October 19, 2017State Compliance achieved7 linked violations
- September 29, 2016State Public Notification received12 linked violations
- December 26, 2012State Administrative/Compliance Order without penalty issued17 linked violations
- February 24, 2012State Public Notification requested53 linked violations
Last known contact on file (system is inactive)
TERRA COTTA ESTATES
6053917483
PIEDMONT, SD 57769