We read 5 results from Mission Hills CSD’s 2025 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 3,600 people · Water system ID CA4210019 · 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 |
|---|---|---|---|---|
| Arsenicas reported · range ND to 3.1 · sampled 2024 · 2025 report, page 5 | 1.03 ppb | 0.004 ppb | 10 ppb | Above the health goal258x the health goal |
| Fluorideas reported · range 0.19 to 0.23 · sampled 2024 · 2025 report, page 5 | 0.21 ppm | 1 ppm | 2 ppm | Below the health goal |
| Nitrate (as N)as reported · range ND to 4.4 · 2025 report, page 5 | 1.19 ppm | 10 ppm | 10 ppm | Below the health goal |
| Hardnessas reported · range 13.5 to 17 · sampled 2024 · 2025 report, page 4 | 15.2 gpg (260 ppm) | — | — | Very hard |
| Sodiumas reported · range 64 to 87 · 2025 report, page 4 | 69 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.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Mission Hills CSD’s water between Jan 2023 and Jul 2023. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium61 ppbFound in 2 of 2 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.
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