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Tap water quality report

Sunset Colony

EPA monitoring tested this supplier for 19 contaminants and detected 9. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

19
contaminants tested
9
detected
140
people served
117
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
Ground water
Ownership
Private
Counties served
Marshall

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.

117
health-based violations
461
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2012-10-01 → 2012-12-31
MCL Health-based Resolved 2012-10-01 → 2012-12-31
MCL Health-based Resolved 2012-10-01 → 2012-12-31
MCL Health-based Resolved 2012-10-01 → 2012-12-31
MCL Health-based Resolved 2012-07-01 → 2012-09-30
MCL Health-based Resolved 2012-07-01 → 2012-09-30
MCL Health-based Resolved 2012-07-01 → 2012-09-30
MCL Health-based Resolved 2012-07-01 → 2012-09-30
MCL Health-based Resolved 2012-04-01 → 2012-06-30
MCL Health-based Resolved 2012-04-01 → 2012-06-30

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
90 µg/L 6.9%
of the EPA limit 1300 µg/L
 15/15 SYR4 2013–2019
Lead
1.9 µg/L 13%
of the EPA limit 15 µg/L
 15/15 SYR4 2013–2019
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2025
Arsenic
88 µg/L 880%
of the EPA limit, in the worst sample — 10 µg/L
 4/4 SYR4 2012
Chromium
14.1 µg/L 14%
of the EPA limit 100 µg/L
 2/2 SYR4 2012–2019
Nitrate
800 µg/L 8%
of the EPA limit 10000 µg/L
 2/2 SYR4 2012
Barium
1 µg/L 0.1%
of the EPA limit 2000 µg/L
 1/2 SYR4 2012–2019
Fluoride
300 µg/L 7.5%
of the EPA limit 4000 µg/L
 1/2 SYR4 2012–2019
Selenium
0.9000 µg/L 1.8%
of the EPA limit 50 µg/L
 1/2 SYR4 2012–2019
10 contaminants tested, none detected
Antimony, TotalBeryllium, TotalCadmiumCombined Radium (-226 And -228)Combined UraniumGross Alpha, Excl. Radon And UGross Beta Particle ActivityMercuryNitriteThallium, Total

Utility contact

Contact
JACK WALDNER
Phone
6054482980
Email
jackwaldner@sunsetcolony.com

Frequently asked questions about Sunset Colony

Is Sunset Colony tap water safe to drink?

EPA monitoring detected 9 contaminants in Sunset 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 Sunset Colony's water?

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

How many people does Sunset Colony serve?

Sunset Colony reports serving 140 people in South Dakota, per its EPA record.

Has Sunset Colony had any water quality violations?

The EPA has 461 violations on file for Sunset Colony, of which 117 are health-based (a contaminant limit or required treatment was breached) and 0 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.