Tap WaterIndex

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Tap water quality report

Red Willow Colony

EPA monitoring tested this supplier for 8 contaminants and detected 3. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

8
contaminants tested
3
detected
93
people served
0
health-based violations
South Dakota rankingsLead in South DakotaPFAS in South Dakota
Water source
Ground water
Ownership
Private
Counties served
Brookings

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.

0
health-based violations
74
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2021-01-01 → 2021-12-31
MR Monitoring Resolved 2021-01-01 → 2021-12-31
MR Monitoring Resolved 2021-01-01 → 2021-12-31
MR Monitoring Resolved 2021-01-01 → 2021-12-31
MR Monitoring Resolved 2021-01-01 → 2021-12-31
MR Monitoring Resolved 2021-01-01 → 2021-12-31
MR Monitoring Resolved 2021-01-01 → 2021-12-31
MR Monitoring Resolved 2021-01-01 → 2021-12-31
MR Monitoring Resolved 2021-01-01 → 2021-12-31
MR Monitoring Resolved 2021-01-01 → 2021-12-31

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
130 µg/L 10%
of the EPA limit 1300 µg/L
 20/20 SYR4 2016–2019
Lead
2.4 µg/L 16%
of the EPA limit 15 µg/L
 20/20 SYR4 2016–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 4/4 LCR 2025
5 contaminants tested, none detected
Combined Radium (-226 And -228)Combined UraniumGross Alpha, Excl. Radon And UGross Beta Particle ActivityNitrite

Utility contact

Contact
RILEY WALDNER
Email
rswaldner@itctel.com

Frequently asked questions about Red Willow Colony

Is Red Willow Colony tap water safe to drink?

EPA monitoring detected 3 contaminants in Red Willow Colony'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 Red Willow Colony's water?

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

How many people does Red Willow Colony serve?

Red Willow Colony reports serving 93 people in South Dakota, per its EPA record.

Has Red Willow Colony had any water quality violations?

The EPA has 74 violations on file for Red Willow Colony, of which 0 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.