Tap WaterIndex

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Tap water quality report

Hay Creek Water Company

EPA monitoring tested this supplier for 5 contaminants and detected 4. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

5
contaminants tested
4
detected
323
people served
15
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
GWP
Ownership
Private
Counties served
Butte

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.

15
health-based violations
50
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2019-04-01
TT Health-based Resolved 2019-04-01
TT Health-based Resolved 2019-02-01
TT Health-based Resolved 2019-02-01
TT Health-based Resolved 2013-02-01
TT Health-based Resolved 2013-02-01
MCL Health-based Resolved 2000-08-01 → 2000-08-31
MCL Health-based Resolved 2000-08-01 → 2000-08-31
MCL Health-based Resolved 2000-08-01 → 2000-08-31
MCL Health-based Resolved 1998-11-01 → 1998-11-30

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
290.8 µg/L 22%
of the EPA limit 1300 µg/L
worst single sample: 477 µg/L
15/15 SYR4 2013–2019
Lead
15.36 µg/L 102%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 19 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
Total Haloacetic Acids (HAA5)
1.03 µg/L 1.7%
of the EPA limit 60 µg/L
 1/3 SYR4 2013–2019
1 contaminants tested, none detected
TTHM

Utility contact

Contact
KEITH ANDERSON
Email
[email protected]

Frequently asked questions about Hay Creek Water Company

Is Hay Creek Water Company tap water safe to drink?

EPA monitoring detected 4 contaminants in Hay Creek Water Company'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 Hay Creek Water Company's water?

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

How many people does Hay Creek Water Company serve?

Hay Creek Water Company reports serving 323 people in South Dakota, per its EPA record.

Has Hay Creek Water Company had any water quality violations?

The EPA has 50 violations on file for Hay Creek Water Company, of which 15 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.