Tap WaterIndex

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Tap water quality report

Waubay

EPA monitoring tested this supplier for 21 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

21
contaminants tested
11
detected
473
people served
8
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
Ground water
Ownership
Local government
Counties served
Day

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.

8
health-based violations
163
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2009-05-01
TT Health-based Resolved 2009-05-01
MCL Health-based Resolved 1991-08-01 → 1991-08-31
MCL Health-based Resolved 1991-08-01 → 1991-08-31
MCL Health-based Resolved 1991-08-01 → 1991-08-31
MCL Health-based Resolved 1991-08-01 → 1991-08-31
MCL Health-based Resolved 1991-01-01 → 1991-01-31
MCL Health-based Resolved 1991-01-01 → 1991-01-31
MR Monitoring Resolved 2009-01-01 → 2009-12-31
MR Monitoring Resolved 2009-01-01 → 2009-12-31

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
517.5 µg/L 40%
of the EPA limit 1300 µg/L
worst single sample: 1600 µg/L
30/30 SYR4 2012–2018
Lead
3.565 µg/L 24%
of the EPA limit 15 µg/L
worst single sample: 5.7 µg/L
30/30 SYR4 2012–2018
Lead
0.0030 mg/L 20%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2024
TTHM
12.36 µg/L 15%
of the EPA limit 80 µg/L
worst single sample: 12.4 µg/L
9/9 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
12.817 µg/L 21%
of the EPA limit 60 µg/L
worst single sample: 16.3 µg/L
7/9 SYR4 2012–2019
Arsenic
1 µg/L 10%
of the EPA limit 10 µg/L
 1/1 SYR4 2012
Barium
30.2 µg/L 1.5%
of the EPA limit 2000 µg/L
 1/1 SYR4 2012
Chromium
4.8 µg/L 4.8%
of the EPA limit 100 µg/L
 1/1 SYR4 2012
Fluoride
540 µg/L 14%
of the EPA limit 4000 µg/L
 1/1 SYR4 2017
Gross Alpha, Excl. Radon And U
6.4 pCi/L 43%
of the EPA limit 15 pCi/L
 1/1 SYR4 2015
Selenium
0.6000 µg/L 1.2%
of the EPA limit 50 µg/L
 1/1 SYR4 2012
10 contaminants tested, none detected
Antimony, TotalBeryllium, TotalCadmiumCombined Radium (-226 And -228)Combined UraniumGross Beta Particle ActivityMercuryNitrateNitriteThallium, Total

Utility contact

Contact
JASON RENCOUNTRE
Phone
6059474371
Email
[email protected]

Frequently asked questions about Waubay

Is Waubay tap water safe to drink?

EPA monitoring detected 11 contaminants in Waubay'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 Waubay's water?

EPA monitoring detected Copper, Lead, Lead, TTHM, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.

How many people does Waubay serve?

Waubay reports serving 473 people in South Dakota, per its EPA record.

Has Waubay had any water quality violations?

The EPA has 163 violations on file for Waubay, of which 8 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.