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Tap water quality report

Ponderosa Ridge

EPA monitoring tested this supplier for 19 contaminants and detected 7. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

19
contaminants tested
7
detected
98
people served
21
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.

21
health-based violations
107
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2015-12-01 → 2015-12-31
MCL Health-based Resolved 2015-12-01 → 2015-12-31
MCL Health-based Resolved 2015-12-01 → 2015-12-31
MCL Health-based Resolved 2009-10-01 → 2009-10-31
MCL Health-based Resolved 2009-10-01 → 2009-10-31
MCL Health-based Resolved 2009-10-01 → 2009-10-31
MCL Health-based Resolved 2009-09-01 → 2009-09-30
MCL Health-based Resolved 2009-09-01 → 2009-09-30
MCL Health-based Resolved 2009-09-01 → 2009-09-30
MCL Health-based Resolved 2000-06-01 → 2000-06-30

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 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
164 µg/L 13%
of the EPA limit 1300 µg/L
 15/15 SYR4 2013–2019
Lead
2 µg/L 13%
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
Nitrate
269 µg/L 2.7%
of the EPA limit 10000 µg/L
 4/4 SYR4 2017–2018
Barium
88 µg/L 4.4%
of the EPA limit 2000 µg/L
 1/1 SYR4 2013
Fluoride
200 µg/L 5%
of the EPA limit 4000 µg/L
 1/1 SYR4 2013
Gross Alpha, Excl. Radon And U
2.49 pCi/L 17%
of the EPA limit 15 pCi/L
 1/1 SYR4 2016
12 contaminants tested, none detected
Antimony, TotalArsenicBeryllium, TotalCadmiumChromiumCombined Radium (-226 And -228)Combined UraniumGross Beta Particle ActivityMercuryNitriteSeleniumThallium, Total

Utility contact

Contact
ETHAN HUDSON
Email
ethanwhudson@gmail.com

Frequently asked questions about Ponderosa Ridge

Is Ponderosa Ridge tap water safe to drink?

EPA monitoring detected 7 contaminants in Ponderosa Ridge'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 Ponderosa Ridge'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 Ponderosa Ridge serve?

Ponderosa Ridge reports serving 98 people in South Dakota, per its EPA record.

Has Ponderosa Ridge had any water quality violations?

The EPA has 107 violations on file for Ponderosa Ridge, of which 21 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.