Tap WaterIndex

← South Dakota

Tap water quality report

New Underwood

EPA monitoring tested this supplier for 7 contaminants and detected 4. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

7
contaminants tested
4
detected
679
people served
104
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
Ground water
Ownership
Local government
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.

104
health-based violations
134
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2010-04-01 → 2010-06-30
MCL Health-based Resolved 2010-04-01 → 2010-06-30
MCL Health-based Resolved 2010-04-01 → 2010-06-30
MCL Health-based Resolved 2010-04-01 → 2010-06-30
MCL Health-based Resolved 2010-04-01 → 2010-06-30
MCL Health-based Resolved 2010-04-01 → 2010-06-30
MCL Health-based Resolved 2010-04-01 → 2010-06-30
MCL Health-based Resolved 2010-04-01 → 2010-06-30
MCL Health-based Resolved 2010-04-01 → 2010-06-30
MCL Health-based Resolved 2010-04-01 → 2010-06-30

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
492 µg/L 38%
of the EPA limit 1300 µg/L
 20/20 SYR4 2014–2017
Lead
6 µg/L 40%
of the EPA limit 15 µg/L
 20/20 SYR4 2014–2017
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2023
TTHM
3.89 µg/L 4.9%
of the EPA limit 80 µg/L
 1/8 SYR4 2013–2019
3 contaminants tested, none detected
NitrateNitriteTotal Haloacetic Acids (HAA5)

Utility contact

Contact
TIM HALL
Phone
6057546777
Email
publicworks1@goldenwest.net

Frequently asked questions about New Underwood

Is New Underwood tap water safe to drink?

EPA monitoring detected 4 contaminants in New Underwood'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 New Underwood'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 New Underwood serve?

New Underwood reports serving 679 people in South Dakota, per its EPA record.

Has New Underwood had any water quality violations?

The EPA has 134 violations on file for New Underwood, of which 104 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.