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Tap water quality report

Shirt Tail Gulch Development

EPA monitoring tested this supplier for 21 contaminants and detected 9. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

21
contaminants tested
9
detected
65
people served
454
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
Ground water
Ownership
Private
Counties served
Lawrence

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.

454
health-based violations
622
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2018-07-01 → 2018-09-30
MCL Health-based Resolved 2018-07-01 → 2018-09-30
MCL Health-based Resolved 2018-07-01 → 2018-09-30
MCL Health-based Resolved 2018-07-01 → 2018-09-30
MCL Health-based Resolved 2018-04-01 → 2018-06-30
MCL Health-based Resolved 2018-04-01 → 2018-06-30
MCL Health-based Resolved 2018-04-01 → 2018-06-30
MCL Health-based Resolved 2018-04-01 → 2018-06-30
MCL Health-based Resolved 2018-04-01 → 2018-06-30
MCL Health-based Resolved 2018-04-01 → 2018-06-30

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 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
120.9 µg/L 9.3%
of the EPA limit 1300 µg/L
worst single sample: 162 µg/L
23/25 SYR4 2013–2019
Lead
3 µg/L 20%
of the EPA limit 15 µg/L
 21/25 SYR4 2013–2019
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 12/12 LCR 2025
Gross Alpha, Excl. Radon And U
34.56 pCi/L 230%
of the EPA limit, at the 95th percentile of samples — 15 pCi/L
worst single sample: 38.6 pCi/L
5/5 SYR4 2015–2019
Arsenic
8.85 µg/L 89%
of the EPA limit 10 µg/L
worst single sample: 9 µg/L
4/5 SYR4 2014–2017
Combined Uranium
1.84 µg/L 6.1%
of the EPA limit 30 µg/L
 4/5 SYR4 2015–2019
Barium
57.6 µg/L 2.9%
of the EPA limit 2000 µg/L
worst single sample: 58 µg/L
2/2 SYR4 2014–2017
Fluoride
2195 µg/L 55%
of the EPA limit 4000 µg/L
worst single sample: 2200 µg/L
2/2 SYR4 2014–2017
TTHM
0.6100 µg/L 0.8%
of the EPA limit 80 µg/L
 1/4 SYR4 2012–2019
12 contaminants tested, none detected
Antimony, TotalBeryllium, TotalCadmiumChromiumCombined Radium (-226 And -228)Gross Beta Particle ActivityMercuryNitrateNitriteSeleniumThallium, TotalTotal Haloacetic Acids (HAA5)

Utility contact

Contact
TREVOR NELSON
Email
[email protected]

Frequently asked questions about Shirt Tail Gulch Development

Is Shirt Tail Gulch Development tap water safe to drink?

EPA monitoring detected 9 contaminants in Shirt Tail Gulch Development'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 Shirt Tail Gulch Development's water?

EPA monitoring detected Copper, Lead, Lead, Gross Alpha, Excl. Radon And U, Arsenic, and others. The full list with the level and data source for each is above.

How many people does Shirt Tail Gulch Development serve?

Shirt Tail Gulch Development reports serving 65 people in South Dakota, per its EPA record.

Has Shirt Tail Gulch Development had any water quality violations?

The EPA has 622 violations on file for Shirt Tail Gulch Development, of which 454 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.