We read 23 results from Hi Desert WD’s 2025 water quality report. No results over a legal limit; 6 above a health goal or guideline.
Serves about 26,411 people · Water system ID CA3610073 · 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 |
|---|---|---|---|---|
| Arsenicaverage · range ND to 8.3 · Wells · 2025 report, page 9 | 4.4 ppb | 0.004 ppb | 10 ppb | Above the health goal1,100x the health goal |
| Chromium-6average · Wells · 2025 report, page 9 | 1.6 ppb | 0.02 ppb | 10 ppb | Above the health goal80x the health goal |
| Gross alpha (radioactivity)average · range 5.92 to 15.1 · Wells · 2025 report, page 9 | 10.5 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Lead90th percentile of 34 homes tested, 0 over the action level · listed as a violation in the report · sampled 2023 · Customer taps · 2025 report, page 9 | 1.7 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal8.5x the health goal |
| PFOA (a PFAS)average · range ND to 3 · printed as 0.0006 ppb · Wells · 2025 report, page 10 | 0.6 ppt | 0.007 ppt | 4 ppt from 2029 | Above the health goal86x the health goal |
| Uraniumaverage · range 5.47 to 19.1 · printed as 8.23 pCi/L · Wells · 2025 report, page 9 | 12.3 ppb | 0.6 ppb | 30 ppb | Above the health goal20x the health goal |
| Aluminumaverage · range ND to 0.06 · printed as 11.2 ppb · Wells · 2025 report, page 9 | 0.01 ppm | — | 0.2 ppm guideline | Within the guideline |
| Chlorineaverage · range 0.04 to 1.17 · Distribution system · 2025 report, page 9 | 0.79 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 34 homes tested, 0 over the action level · listed as a violation in the report · sampled 2023 · Customer taps · 2025 report, page 9 | 0.15 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (TTHM)average · range 6 to 16 · Distribution system · 2025 report, page 9 | 11 ppb | None set | 80 ppb | Below the legal limit |
| Nitrate (as N)average · range 0.97 to 5.6 · Wells · 2025 report, page 9 | 2.8 ppm | 10 ppm | 10 ppm | Below the health goal |
| PFHxS (a PFAS)average · range ND to 3 · printed as 0.00037 ppb · Wells · 2025 report, page 10 | 0.37 ppt | None set | 10 ppt from 2029 | Below the legal limit |
| PFOS (a PFAS)average · range ND to 2.4 · printed as 0.00026 ppb · Wells · 2025 report, page 10 | 0.26 ppt | 1 ppt | 4 ppt from 2029 | Below the health goal |
| pHaverage · range 7.5 to 8.4 · Wells · 2025 report, page 9 | 8.4 | — | — | Normal range |
| Total dissolved solidsaverage · range 190 to 320 · Wells · 2025 report, page 9 | 261 ppm | — | 500 ppm guideline | Within the guideline |
| Zincaverage · range ND to 0.01 · Wells · 2025 report, page 9 | 0.0054 ppm | — | 5 ppm guideline | Within the guideline |
| Calciumaverage · range 25 to 49 · Wells · 2025 report, page 10 | 40.2 ppm | None set | None | No health limit |
| Hardnessaverage · range 4.09 to 9.36 · Wells · 2025 report, page 10 | 7.6 gpg (130 ppm) | — | — | Hard |
| Magnesiumaverage · range 1.5 to 8.8 · Wells · 2025 report, page 10 | 6.5 ppm | None set | None | No health limit |
| PFHxA (a PFAS)average · range ND to 4.1 · printed as 0.00079 ppb · Wells · 2025 report, page 10 | 0.79 ppt | None set | None | No health limit |
| PFPeA (a PFAS)average · range ND to 3.4 · printed as 0.00048 ppb · Wells · 2025 report, page 10 | 0.48 ppt | None set | None | No health limit |
| Potassiumaverage · range 1.5 to 1.8 · Wells · 2025 report, page 10 | 1.66 ppm | None set | None | No health limit |
| Sodiumaverage · range 37 to 54 · Wells · 2025 report, page 10 | 42.4 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 Hi Desert WD’s water between Sep 2024 and Dec 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFHxS3 pptFound in 1 of 14 samples · highest resultNo federal limit in force for this one
- Lithium23 ppbFound in 12 of 14 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), Uranium
What removes it: Reverse osmosis.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
PFAS ("forever chemicals")
Found: PFOA (a PFAS)
What removes it: Reverse osmosis.
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