We read 5 results from Red Willow Colony’s 2025 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 93 people · Water system ID SD4602352 · Read the district’s 2025 report (opens in a new tab)
Open this district in the water lookupCompare with your own test results, see the district map and get matched filters.
Results from the 2025 report
Each number is copied from the district’s report and links to the page it’s printed on. Where the report lists several plants, wells or purchased water, the highest is shown.
| Contaminant | Result | Health goal | Legal limit | What it means |
|---|---|---|---|---|
| Copper90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 3 | 0.5 ppm | 0.3 ppm | 1.3 ppm (action level) | Above the health goal1.7x the health goal |
| Thalliumhighest measured · range 0.2 to 0.2 · sampled 2023 · 2025 report, page 3 | 0.2 ppb | 0.1 ppb | 2 ppb | Above the health goal2x the health goal |
| Bariumhighest measured · range 0.0015 to 0.0015 · sampled 2023 · 2025 report, page 3 | 0.0015 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chromium (total)highest measured · range 1.9 to 1.9 · sampled 2023 · 2025 report, page 3 | 1.9 ppb | None set | 100 ppb | Below the legal limit |
| Lead90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 3 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper.
What you can do
Nothing here is an emergency notice: if the district has a violation, it must tell customers directly. If you’d like to lower these at your tap, these are the treatments that remove them, and the catalog shows the models certified for each. Ranking is by certified removal; commissions never change the order.
Copper
Found: Copper
What removes it: Reverse osmosis.
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