We read 11 results from Timberlake Master Assn INC’s 2025 water quality report. No results over a legal limit; 4 above a health goal or guideline.
Serves about 300 people · Water system ID MO3031365 · 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 |
|---|---|---|---|---|
| Gross alpha (radioactivity)highest measured · range 4.9 to 4.9 · sampled 2024 · 2025 report, page 2 | 4.9 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Radium (combined 226 + 228)highest measured · range 4.2 to 4.2 · sampled 2024 · 2025 report, page 2 | 4.2 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Radium-226highest measured · range 2.3 to 2.3 · sampled 2024 · 2025 report, page 2 | 2.3 pCi/L | 0.05 pCi/L | 5 pCi/L | Above the health goal46x the health goal |
| Radium-228highest measured · range 1.9 to 1.9 · sampled 2024 · 2025 report, page 2 | 1.9 pCi/L | 0.02 pCi/L | 5 pCi/L | Above the health goal100x the health goal |
| Bariumhighest measured · range 0.13 to 0.13 · sampled 2024 · 2025 report, page 2 | 0.13 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chromium (total)highest measured · range ND to 3.83 · sampled 2024 · 2025 report, page 2 | 3.83 ppb | None set | 100 ppb | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 2 | 0.07 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Fluoridehighest measured · range 0.21 to 0.22 · sampled 2024 · 2025 report, page 2 | 0.22 ppm | 1 ppm | 4 ppm | Below the health goal |
| Lead90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 2 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)highest measured · range 0.04 to 0.04 · 2025 report, page 2 | 0.04 ppm | 10 ppm | 10 ppm | Below the health goal |
| Xyleneshighest measured · range 0.00069 to 0.00069 · 2025 report, page 2 | 0.00069 ppm | 10 ppm | 10 ppm | 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. 15 numbers we weren’t sure about are held back until a person checks.
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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