We read 22 results from Lamont Public Utility Dist’s 2025 water quality report. No results over a legal limit; 3 above a health goal or guideline.
Serves about 19,057 people · Water system ID CA1510012 · 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 |
|---|---|---|---|---|
| Chromium-6average · range ND to 3.4 · sampled 2024 · 2025 report, page 2 | 1.26 ppb | 0.02 ppb | 10 ppb | Above the health goal63x the health goal |
| Gross alpha (radioactivity)average · range ND to 7.32 · 2025 report, page 2 | 1.73 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Lead90th percentile of 30 homes tested, 0 over the action level · Customer taps · 2025 report, page 2 | 1.9 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal9.5x the health goal |
| Bariumaverage · range 0.07 to 0.14 · sampled 2024 · 2025 report, page 2 | 0.09 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorideaverage · range 17 to 100 · 2025 report, page 2 | 61.4 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorineaverage · range 0.2 to 2.2 · 2025 report, page 2 | 0.98 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 30 homes tested, 0 over the action level · Customer taps · 2025 report, page 2 | 0.13 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)average · range ND to 5.5 · 2025 report, page 2 | 2.75 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)average · range 4.5 to 5.6 · 2025 report, page 2 | 5.05 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · range 0.12 to 0.28 · sampled 2024 · 2025 report, page 2 | 0.2 ppm | 1 ppm | 2 ppm | Below the health goal |
| Ironaverage · range ND to 0.09 · printed as 12.28 ppb · 2025 report, page 2 | 0.01 ppm | — | 0.3 ppm guideline | Within the guideline |
| Nitrate (as N)average · range 0.46 to 9.6 · 2025 report, page 2 | 3.12 ppm | 10 ppm | 10 ppm | Below the health goal |
| Perchlorateaverage · range ND to 4.3 · 2025 report, page 2 | 0.71 ppb | 1 ppb | 6 ppb | Below the health goal |
| pHaverage · range 7.94 to 8.12 · 2025 report, page 2 | 8 | — | — | Normal range |
| Seleniumaverage · range ND to 4.2 · sampled 2024 · 2025 report, page 2 | 1.15 ppb | 30 ppb | 50 ppb | Below the health goal |
| Sulfateaverage · range 38 to 130 · 2025 report, page 2 | 84.7 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidsaverage · range 290 to 590 · 2025 report, page 2 | 448 ppm | — | 500 ppm guideline | Within the guideline |
| Calciumaverage · range 38 to 75 · 2025 report, page 2 | 61.9 ppm | None set | None | No health limit |
| Conductivityaverage · range 430 to 891 · 2025 report, page 2 | 689 µS/cm | None set | None | No health limit |
| Hardnessaverage · range 7.6 to 15.2 · 2025 report, page 2 | 12.1 gpg (206 ppm) | — | — | Very hard |
| Magnesiumaverage · range 7.7 to 17 · 2025 report, page 2 | 13.3 ppm | None set | None | No health limit |
| Sodiumaverage · range 44 to 91 · 2025 report, page 2 | 60.9 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. 1 number we weren’t sure about is held back until a person checks.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Lamont Public Utility Dist’s water between Nov 2023 and May 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium14.1 ppbFound in 10 of 12 samples · highest resultAbove EPA’s health reference level of 10 ppb (a guide, not a legal limit)
Source: EPA UCMR 5 occurrence data. The highest single result is shown; one high sample doesn’t mean every glass is that high.
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)
What removes it: Reverse osmosis.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
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