We read 11 results from Centerville’s 2025 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 918 people · Water system ID SD4600085 · 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 |
|---|---|---|---|---|
| Arsenichighest measured · range 1 to 1 · Lewis and Clark Regional Water System · 2025 report, page 3 | 1 ppb | 0.004 ppb | 10 ppb | Above the health goal250x the health goal |
| Lead90th percentile of homes tested, 0 over the action level · sampled 2023 · Customer taps · 2025 report, page 3 | 8 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal40x the health goal |
| Bariumhighest measured · range 0.01 to 0.01 · Lewis and Clark Regional Water System · 2025 report, page 3 | 0.01 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chromium (total)highest measured · range 0.74 to 0.74 · Lewis and Clark Regional Water System · 2025 report, page 3 | 0.74 ppb | None set | 100 ppb | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · sampled 2023 · Customer taps · 2025 report, page 3 | Not detected | 0.3 ppm | 1.3 ppm (action level) | Not detected |
| Disinfection byproducts (HAA5)highest running annual average · 2025 report, page 3 | 15.9 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · 2025 report, page 4 | 37.1 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.49 to 0.85 · Lewis and Clark Regional Water System · 2025 report, page 3 | 0.85 ppm | 1 ppm | 4 ppm | Below the health goal |
| Mercuryhighest measured · range 0.11 to 0.11 · Lewis and Clark Regional Water System · 2025 report, page 3 | 0.11 ppb | 1.2 ppb | 2 ppb | Below the health goal |
| Nitrate (as N)highest measured · Lewis and Clark Regional Water System · 2025 report, page 3 | 0.3 ppm | 10 ppm | 10 ppm | Below the health goal |
| Seleniumhighest measured · range 1 to 1 · Lewis and Clark Regional Water System · 2025 report, page 3 | 1 ppb | 30 ppb | 50 ppb | Below the health goal |
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.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
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