We read 10 results from City of Morgan Hill’s 2024 water quality report. No results over a legal limit or above a health goal.
Serves about 47,374 people · Water system ID CA4310006 · 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 |
|---|---|---|---|---|
| Copper90th percentile of 30 homes tested, 0 over the action level · Customer taps · 2024 report, page 6 | 0.28 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Fluorideaverage · range ND to 0.13 · Wells · 2024 report, page 6 | 0.05 ppm | 1 ppm | 2 ppm | Below the health goal |
| Lead90th percentile of 30 homes tested, 0 over the action level · Customer taps · 2024 report, page 6 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)average · range 2.6 to 5.9 · Wells · 2024 report, page 6 | 4.78 ppm | 10 ppm | 10 ppm | Below the health goal |
| Sulfateaverage · range 33 to 39 · Wells · 2024 report, page 6 | 35 ppm | — | 250 ppm guideline | Within the guideline |
| Total dissolved solidsaverage · range 330 to 360 · Wells · 2024 report, page 6 | 343 ppm | — | 500 ppm guideline | Within the guideline |
| Conductivityaverage · range 550 to 620 · Wells · 2024 report, page 6 | 590 µS/cm | None set | None | No health limit |
| Hardnessaverage · range 13.2 to 17.4 · Wells · 2024 report, page 6 | 15.6 gpg (267 ppm) | — | — | Very hard |
| Lithiumaverage · range 4.58 to 14.4 · Wells · 2024 report, page 6 | 10.9 ppb | None set | None | No health limit |
| Sodiumaverage · range 24 to 27 · Wells · 2024 report, page 6 | 26 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 City of Morgan Hill’s water between Jul 2023 and Dec 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFHxS3.3 pptFound in 3 of 32 samples · highest resultNo federal limit in force for this one
- Lithium25.5 ppbFound in 27 of 32 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 in this report is above a health goal or legal limit. If you’re bothered by taste, smell, hardness or spots, or your home has older pipes, the filter catalog and buyer questions can help you pick, and a test of your own tap shows what your plumbing adds.
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