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Public water system record

Shamrock Colony

On record as serving Clark County, SD · Serves 75 people

Federal records show 1 health-based violation and 12 monitoring/reporting issues for Shamrock Colony in the last ten years. The most serious issue in this window was a resolved Groundwater Rule violation.

  • SD4602267
  • CARPENTER
  • SD
  • 75 served

System profile

Source water Groundwater
ZIP 57322
EPA system ID SD4602267

Verify this system on EPA ECHO →

Health-based violations, last 10 years
1
Resolved
1
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
12

Key facts

  • Shamrock Colony draws water from 1 well.
  • Most recent formal enforcement: compliance order (no penalty) by South Dakota, January 2012.
  • Record on file since 2009, with 7 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 17 service lines.

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant Rule family Start date Status Acute
Groundwater Rule
Treatment technique failure
 140 Nov 22, 2017 Resolved No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
Revised Total Coliform Rule
Monitoring violation
 Aug 1, 2025 Resolved
Consumer Confidence Rule
OTHER
 Jul 1, 2025 Active
Revised Total Coliform Rule
Monitoring violation
 Jun 1, 2025 Resolved
Revised Total Coliform Rule
Monitoring violation
 Mar 1, 2025 Resolved
Revised Total Coliform Rule
Monitoring violation
 Oct 1, 2024 Resolved
Revised Total Coliform Rule
Monitoring violation
 Jan 1, 2024 Resolved
Revised Total Coliform Rule
Monitoring violation
 Dec 1, 2023 Resolved
Revised Total Coliform Rule
Monitoring violation
 Oct 1, 2021 Resolved
Revised Total Coliform Rule
Monitoring violation
 Sep 1, 2021 Resolved
Revised Total Coliform Rule
Monitoring violation
 Jan 1, 2021 Resolved
Revised Total Coliform Rule
Monitoring violation
 Dec 1, 2019 Resolved
Revised Total Coliform Rule
Monitoring violation
 Jul 1, 2017 Resolved

Full record since 2009

EPA's records for Shamrock Colony go back to 2009. Before October 19, 2016 they list 7 health-based violations (7 resolved) and 75 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
2000s 0 32
2010 to October 18, 2016 7 43
October 19, 2016 to 2019 1 2
2020s 0 10

Most recent health-based violation before October 19, 2016: Fluoride, began January 2012, Resolved.

Show all 7 health-based violations before October 19, 2016
Contaminant Start date Status
Fluoride
Contaminant limit exceeded
Measured 4.4 mg/L, federal limit 4 mg/L (1.1 times the limit)
 Jan 1, 2012 Resolved
Fluoride
Contaminant limit exceeded
Measured 4.4 mg/L, federal limit 4 mg/L (1.1 times the limit)
 Oct 1, 2011 Resolved
Fluoride
Contaminant limit exceeded
Measured 4.7 mg/L, federal limit 4 mg/L (1.2 times the limit)
 Jul 1, 2011 Resolved
Fluoride
Contaminant limit exceeded
Measured 4.7 mg/L, federal limit 4 mg/L (1.2 times the limit)
 Apr 1, 2011 Resolved
Fluoride
Contaminant limit exceeded
Measured 4.6 mg/L, federal limit 4 mg/L (1.2 times the limit)
 Jan 1, 2011 Resolved
Fluoride
Contaminant limit exceeded
Measured 4.6 mg/L, federal limit 4 mg/L (1.2 times the limit)
 Oct 1, 2010 Resolved
Fluoride
Contaminant limit exceeded
Measured 4.6 mg/L, federal limit 4 mg/L (1.2 times the limit)
 Jul 1, 2010 Resolved

Enforcement actions

South Dakota regulators took 1 formal enforcement action against Shamrock Colony in 2012, filed as 12 records in EPA's data. The most recent was a compliance order (no penalty) in January 2012.

Date By Action Violations covered
Jan 5, 2012 South Dakota Compliance order (no penalty) 12 violations (6 health-based): Public Notice, Fluoride

What the violations mean

Groundwater Rule

1 incident

The system did not complete a treatment step or action that the Groundwater Rule requires (a treatment technique violation).

The utility had to notify customers about this violation.

Where the water comes from

Shamrock Colony draws water from 1 well.

Annual water quality report

Shamrock Colony must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Shamrock Colony for a copy.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by South Dakota.

Certified drinking water labs by state EPA guidance for private wells