Tap WaterIndex

← South Dakota

Tap water quality report

Hidden Valley Water Association Inc

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
27
people served
18
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
Ground water
Ownership
Private
Counties served
Pennington

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.

18
health-based violations
60
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2017-10-01
TT Health-based Resolved 2017-10-01
TT Health-based Resolved 2016-02-01
TT Health-based Resolved 2016-02-01
MCL Health-based Resolved 1999-01-01 → 1999-01-31
MCL Health-based Resolved 1999-01-01 → 1999-01-31
MCL Health-based Resolved 1998-12-01 → 1998-12-31
MCL Health-based Resolved 1998-12-01 → 1998-12-31
MCL Health-based Resolved 1998-12-01 → 1998-12-31
MCL Health-based Resolved 1994-09-01 → 1994-09-30

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 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
165.1 µg/L 13%
of the EPA limit 1300 µg/L
worst single sample: 205 µg/L
15/15 SYR4 2012–2018
Lead
6.7 µg/L 45%
of the EPA limit 15 µg/L
worst single sample: 13 µg/L
15/15 SYR4 2012–2018
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2024
Nitrate
905 µg/L 9%
of the EPA limit 10000 µg/L
 4/6 SYR4 2017–2019
Barium
514 µg/L 26%
of the EPA limit 2000 µg/L
 1/1 SYR4 2012
Chromium
2 µg/L 2%
of the EPA limit 100 µg/L
 1/1 SYR4 2012
Fluoride
200 µg/L 5%
of the EPA limit 4000 µg/L
 1/1 SYR4 2012
Gross Alpha, Excl. Radon And U
2.9 pCi/L 19%
of the EPA limit 15 pCi/L
 1/1 SYR4 2012
TTHM
2.32 µg/L 2.9%
of the EPA limit 80 µg/L
 1/4 SYR4 2012–2018
12 contaminants tested, none detected
Antimony, TotalArsenicBeryllium, TotalCadmiumCombined Radium (-226 And -228)Combined UraniumGross Beta Particle ActivityMercuryNitriteSeleniumThallium, TotalTotal Haloacetic Acids (HAA5)

Utility contact

Contact
JOHN BUHLER
Phone
6054157388
Email
[email protected]

Frequently asked questions about Hidden Valley Water Association Inc

Is Hidden Valley Water Association Inc tap water safe to drink?

EPA monitoring detected 9 contaminants in Hidden Valley Water Association Inc'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 Hidden Valley Water Association Inc's water?

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

How many people does Hidden Valley Water Association Inc serve?

Hidden Valley Water Association Inc reports serving 27 people in South Dakota, per its EPA record.

Has Hidden Valley Water Association Inc had any water quality violations?

The EPA has 60 violations on file for Hidden Valley Water Association Inc, of which 18 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.