We read 21 results from Walnut Grove Mhp’s 2025 water quality report. No results over a legal limit; 5 above a health goal or guideline.
Serves about 210 people · Water system ID MO4041308 · Read the district’s 2025 report (opens in a new tab)
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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 1.04 to 1.04 · sampled 2023 · 2025 report, page 2 | 1.04 ppb | 0.004 ppb | 10 ppb | Above the health goal260x the health goal |
| Gross alpha (radioactivity)highest measured · range 4.3 to 4.3 · 2025 report, page 2 | 4.3 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Radium (combined 226 + 228)highest measured · range 3.8 to 3.8 · 2025 report, page 2 | 3.8 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Radium-226highest measured · range 1.6 to 1.6 · 2025 report, page 2 | 1.6 pCi/L | 0.05 pCi/L | 5 pCi/L | Above the health goal32x the health goal |
| Radium-228highest measured · range 2.2 to 2.2 · 2025 report, page 2 | 2.2 pCi/L | 0.02 pCi/L | 5 pCi/L | Above the health goal116x the health goal |
| Bariumhighest measured · range 0.0021 to 0.0021 · sampled 2023 · 2025 report, page 2 | 0.0021 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chloridehighest measured · range 59.1 to 59.1 · sampled 2023 · 2025 report, page 3 | 59.1 ppm | — | 250 ppm guideline | Within the guideline |
| Copper90th percentile of homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 2 | 0.1 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Fluoridehighest measured · range 0.21 to 0.21 · sampled 2023 · 2025 report, page 2 | 0.21 ppm | 1 ppm | 4 ppm | Below the health goal |
| Lead90th percentile of homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 2 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)highest measured · range 0.08 to 0.08 · 2025 report, page 2 | 0.08 ppm | 10 ppm | 10 ppm | Below the health goal |
| pHhighest measured · range 7.62 to 7.62 · sampled 2023 · 2025 report, page 3 | 7.62 | — | — | Normal range |
| Sulfatehighest measured · range 23.8 to 23.8 · sampled 2023 · 2025 report, page 3 | 23.8 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidshighest measured · range 417 to 417 · sampled 2023 · 2025 report, page 3 | 417 ppm | — | 500 ppm guideline | Within the guideline |
| Zinchighest measured · range 0.0022 to 0.0022 · sampled 2023 · 2025 report, page 3 | 0.0022 ppm | — | 5 ppm guideline | Within the guideline |
| Alkalinityhighest measured · range 261 to 261 · sampled 2023 · 2025 report, page 3 | 261 ppm | None set | None | No health limit |
| Calciumhighest measured · range 2.5 to 2.5 · sampled 2023 · 2025 report, page 3 | 2.5 ppm | None set | None | No health limit |
| Hardnesshighest measured · range 0.64 to 0.64 · sampled 2023 · 2025 report, page 3 | 0.64 gpg (11 ppm) | — | — | Soft |
| Magnesiumhighest measured · range 1.16 to 1.16 · sampled 2023 · 2025 report, page 3 | 1.16 ppm | None set | None | No health limit |
| Potassiumhighest measured · range 4.3 to 4.3 · sampled 2023 · 2025 report, page 3 | 4.3 ppm | None set | None | No health limit |
| Sodiumhighest measured · range 151 to 151 · sampled 2023 · 2025 report, page 3 | 151 ppm | None set | None | No health limit |
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.
Radium and uranium
Found: Gross alpha (radioactivity), Radium (combined 226 + 228), Radium-226, Radium-228
What removes it: Reverse osmosis.
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