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Tap water quality report

Shamrock Colony

EPA monitoring tested this supplier for 19 contaminants and detected 3. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

19
contaminants tested
3
detected
75
people served
33
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
Ground water
Ownership
Private
Counties served
Clark

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

33
health-based violations
235
violations on file
1
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2017-11-22
TT Health-based Resolved 2017-11-22
MCL Health-based Resolved 2012-01-01 → 2012-03-31
MCL Health-based Resolved 2012-01-01 → 2012-03-31
MCL Health-based Resolved 2012-01-01 → 2012-03-31
MCL Health-based Resolved 2011-10-01 → 2011-12-31
MCL Health-based Resolved 2011-10-01 → 2011-12-31
MCL Health-based Resolved 2011-10-01 → 2011-12-31
MCL Health-based Resolved 2011-10-01 → 2011-12-31
MCL Health-based Resolved 2011-07-01 → 2011-09-30

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
20 µg/L 1.5%
of the EPA limit 1300 µg/L
 26/26 SYR4 2013–2019
Lead
2.2 µg/L 15%
of the EPA limit 15 µg/L
 26/26 SYR4 2013–2019
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 10/10 LCR 2025
16 contaminants tested, none detected
Antimony, TotalArsenicBariumBeryllium, TotalCadmiumChromiumCombined Radium (-226 And -228)Combined UraniumFluorideGross Alpha, Excl. Radon And UGross Beta Particle ActivityMercuryNitrateNitriteSeleniumThallium, Total

Utility contact

Contact
THOMAS WALDNER
Phone
6053521452
Email
tommyj65@hotmail.com

Frequently asked questions about Shamrock Colony

Is Shamrock Colony tap water safe to drink?

EPA monitoring detected 3 contaminants in Shamrock Colony's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Shamrock Colony's water?

EPA monitoring detected Copper, Lead, Lead. The full list with the level and data source for each is above.

How many people does Shamrock Colony serve?

Shamrock Colony reports serving 75 people in South Dakota, per its EPA record.

Has Shamrock Colony had any water quality violations?

The EPA has 235 violations on file for Shamrock Colony, of which 33 are health-based (a contaminant limit or required treatment was breached) and 1 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.