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Tap water quality report

Copper Oaks I

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
64
people served
4
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
GWP
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.

4
health-based violations
52
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2023-11-29
TT Health-based Resolved 2023-11-29
TT Health-based Resolved 2015-02-01
TT Health-based Resolved 2015-02-01
MR Monitoring Resolved 2024-01-01 → 2024-03-31
MR Monitoring Resolved 2024-01-01 → 2024-03-31
MON Monitoring Resolved 2023-10-01 → 2023-10-31
MON Monitoring Resolved 2023-10-01 → 2023-10-31
MON Monitoring Resolved 2023-10-01 → 2023-10-31
MR Monitoring Resolved 1998-01-01 → 1998-12-31

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 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
204 µg/L 16%
of the EPA limit 1300 µg/L
 15/15 SYR4 2013–2019
Lead
4 µg/L 27%
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
TTHM
2.5 µg/L 3.1%
of the EPA limit 80 µg/L
 1/3 SYR4 2013–2019
1 contaminants tested, none detected
Total Haloacetic Acids (HAA5)

Utility contact

Contact
ANDREW JOHNSON
Email
abj1976@gmail.com

Frequently asked questions about Copper Oaks I

Is Copper Oaks I tap water safe to drink?

EPA monitoring detected 4 contaminants in Copper Oaks I'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 Copper Oaks I's water?

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

How many people does Copper Oaks I serve?

Copper Oaks I reports serving 64 people in South Dakota, per its EPA record.

Has Copper Oaks I had any water quality violations?

The EPA has 52 violations on file for Copper Oaks I, of which 4 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.