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Tap water quality report

Walnut Park

EPA monitoring tested this supplier for 21 contaminants and detected 7. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

21
contaminants tested
7
detected
180
people served
20
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.

20
health-based violations
214
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2024-10-17
TT Health-based Resolved 2019-02-01
TT Health-based Resolved 2019-02-01
TT Health-based Resolved 2018-10-02
TT Health-based Resolved 2018-10-02
TT Health-based Resolved 2018-05-16
TT Health-based Resolved 2018-05-16
TT Health-based Resolved 2017-05-01
TT Health-based Resolved 2017-05-01

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
228.2 µg/L 18%
of the EPA limit 1300 µg/L
worst single sample: 294 µg/L
15/15 SYR4 2012–2018
Lead
9.1 µg/L 61%
of the EPA limit 15 µg/L
worst single sample: 14 µg/L
15/15 SYR4 2012–2018
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2024
Nitrate
786 µg/L 7.9%
of the EPA limit 10000 µg/L
 6/6 SYR4 2017–2019
Barium
323 µg/L 16%
of the EPA limit 2000 µg/L
 1/1 SYR4 2017
Fluoride
200 µg/L 5%
of the EPA limit 4000 µg/L
 1/1 SYR4 2017
Gross Alpha, Excl. Radon And U
4.7 pCi/L 31%
of the EPA limit 15 pCi/L
 1/1 SYR4 2015
14 contaminants tested, none detected
Antimony, TotalArsenicBeryllium, TotalCadmiumChromiumCombined Radium (-226 And -228)Combined UraniumGross Beta Particle ActivityMercuryNitriteSeleniumTTHMThallium, TotalTotal Haloacetic Acids (HAA5)

Utility contact

Contact
FRANK KARAS
Email
[email protected]

Frequently asked questions about Walnut Park

Is Walnut Park tap water safe to drink?

EPA monitoring detected 7 contaminants in Walnut Park'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 Walnut Park'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 Walnut Park serve?

Walnut Park reports serving 180 people in South Dakota, per its EPA record.

Has Walnut Park had any water quality violations?

The EPA has 214 violations on file for Walnut Park, of which 20 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.