CARPENTER, SD · Clark County
SHAMROCK COLONY Water System
Consumer Confidence Report status
SHAMROCK COLONY must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show no open violations for SHAMROCK COLONY.
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)
- SD4602267
- System type
- Community Water System
- Population served
- 75
- Service connections
- 23
- Ownership
- privately owned
- Water source
- groundwater (wells)
SHAMROCK COLONY is one of 583 community water systems in South Dakota in the 500 or fewer people size category, serving 75 people from groundwater.
As of August 1, 2026, its federal record holds 11 entries between 2009 and 2025, all of which EPA lists as closed.
All 11 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 the Total Coliform Rules, synthetic organic chemicals, and the Radionuclides and Revised Rad Rule.
Violation history
Monitoring, Routine (RTCR)
—Revised Total Coliform Rule
June 1, 2025 – June 30, 2025
ResolvedMonitoring, Routine (RTCR)
—Revised Total Coliform Rule
October 1, 2024 – October 31, 2024
ResolvedMonitoring, Routine (RTCR)
—Revised Total Coliform Rule
September 1, 2021 – September 30, 2021
ResolvedMonitoring, Routine (RTCR)
—Revised Total Coliform Rule
December 1, 2019 – December 31, 2019
ResolvedMonitoring, Routine (RTCR)
—Revised Total Coliform Rule
July 1, 2017 – July 31, 2017
ResolvedMonitoring, Regular
—Endothall
January 1, 2014 – March 31, 2014
ResolvedMonitoring, Regular
—Hexachlorocyclopentadiene
January 1, 2014 – March 31, 2014
ResolvedMonitoring, Regular
—2,4-D
January 1, 2014 – March 31, 2014
ResolvedMonitoring, Regular
—ETHYLENE DIBROMIDE
January 1, 2014 – March 31, 2014
ResolvedMonitoring, Regular
—Gross Alpha, Excl. Radon and U
July 1, 2010 – September 30, 2010
ResolvedMonitoring, Regular
—Trichloroethylene
July 1, 2009 – September 30, 2009
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| June 1, 2025 – June 30, 2025 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| October 1, 2024 – October 31, 2024 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| September 1, 2021 – September 30, 2021 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| December 1, 2019 – December 31, 2019 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| July 1, 2017 – July 31, 2017 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| January 1, 2014 – March 31, 2014 | Monitoring, Regular | Endothall | — | Resolved |
| January 1, 2014 – March 31, 2014 | Monitoring, Regular | Hexachlorocyclopentadiene | — | Resolved |
| January 1, 2014 – March 31, 2014 | Monitoring, Regular | 2,4-D | — | Resolved |
| January 1, 2014 – March 31, 2014 | Monitoring, Regular | ETHYLENE DIBROMIDE | — | Resolved |
| July 1, 2010 – September 30, 2010 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | Resolved |
| July 1, 2009 – September 30, 2009 | Monitoring, Regular | Trichloroethylene | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- November 8, 2024State Public Notification requested10 linked violations
- February 12, 2024State Public Notification requested4 linked violations
- January 10, 2024State Public Notification received3 linked violations
- October 6, 2021State Public Notification requested2 linked violations
- February 1, 2020State Compliance achieved3 linked violations
- May 16, 2014State Compliance achieved11 linked violations
- May 16, 2014State Compliance achieved13 linked violations
- May 16, 2014State Compliance achieved10 linked violations
- May 16, 2014State Compliance achieved9 linked violations
- May 5, 2014State Public Notification requested12 linked violations
- July 10, 2012State Compliance achieved14 linked violations
- January 5, 2012State Administrative/Compliance Order without penalty issued25 linked violations
- January 5, 2012State Administrative/Compliance Order without penalty issued27 linked violations
- July 6, 2010State Public Notification received45 linked violations
- October 26, 2009State Public Notification requested88 linked violations
Common questions
Is SHAMROCK COLONY required to publish a Consumer Confidence Report?
- Yes. SHAMROCK COLONY is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is SHAMROCK COLONY’s next Consumer Confidence Report due?
- SHAMROCK COLONY’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does SHAMROCK COLONY have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for SHAMROCK COLONY.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
SHAMROCK COLONY
6053521452
CARPENTER, SD 57322