We read 14 results from Yucaipa Valley Water District’s 2024 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 52,010 people · Water system ID CA3610055 · Read the district’s 2024 report (opens in a new tab)
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Results from the 2024 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)average · range ND to 3.6 · listed as a violation in the report · Sources · 2024 report, page 6 | 0.01 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Uraniumaverage · range ND to 4.32 · listed as a violation in the report · printed as 1.5 pCi/L · Sources · 2024 report, page 6 | 2.24 ppb | 0.6 ppb | 30 ppb | Above the health goal3.7x the health goal |
| 1,1-Dichloroethyleneaverage · range ND to 0.51 · listed as a violation in the report · Sources · 2024 report, page 6 | 0.008 ppb | 7 ppb | 7 ppb | Below the health goal |
| Chlorideaverage · range 6.2 to 48 · Sources · 2024 report, page 7 | 30.2 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorineaverage · range 0.21 to 1.94 · listed as a violation in the report · Distribution system · 2024 report, page 5 | 1 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 60 homes tested, 0 over the action level · listed as a violation in the report · printed as 140 ppb · sampled 2023 · Customer taps · 2024 report, page 7 | 0.14 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)average · range ND to 18.6 · listed as a violation in the report · Distribution system · 2024 report, page 5 | 7.62 ppb | None set | 60 ppb | Below the legal limit |
| Lead90th percentile of 60 homes tested, 0 over the action level · listed as a violation in the report · sampled 2023 · Customer taps · 2024 report, page 7 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Sulfateaverage · range 8.8 to 71 · Sources · 2024 report, page 7 | 18.6 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidsaverage · range 150 to 420 · Sources · 2024 report, page 7 | 202 ppm | — | 500 ppm guideline | Within the guideline |
| Hardnessaverage · range 4.09 to 19.3 · Sources · 2024 report, page 8 | 6.73 gpg (115 ppm) | — | — | Moderately hard |
| Sodiumaverage · range 13 to 44 · Sources · 2024 report, page 8 | 27 ppm | None set | None | No health limit |
| Total organic carbonaverage · range ND to 1.2 · listed as a violation in the report · Treatment plants · 2024 report, page 5 | 0.4 ppm | None set | None | No health limit |
| Vanadiumaverage · range ND to 28 · Sources · 2024 report, page 8 | 6.2 ppb | 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. 2 numbers we weren’t sure about are held back until a person checks.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Yucaipa Valley Water District’s water between Oct 2023 and Jul 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA4.2 pptFound in 1 of 31 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFBS10 pptFound in 2 of 31 samples · highest resultNo federal limit in force for this one
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.
PFAS ("forever chemicals")
Found: PFOA (EPA testing)
What removes it: Reverse osmosis.
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