We read 14 results from Calif State Polytechnical Univ - Pomona’s 2025 water quality report. No results over a legal limit; 4 above a health goal or guideline.
Serves about 29,854 people · Water system ID CA1910022 · 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 1.8 to 1.8 · CPP system · 2025 report, page 12 | 1.8 ppb | 0.02 ppb | 10 ppb | Above the health goal90x the health goal |
| Gross alpha (radioactivity)average · range 10.7 to 10.7 · sampled 2022 · CPP system · 2025 report, page 12 | 10.7 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Lead90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 13 | 0.79 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal4x the health goal |
| Uraniumaverage · printed as 6.82 pCi/L · sampled 2022 · CPP system · 2025 report, page 13 | 10.2 ppb | 0.6 ppb | 30 ppb | Above the health goal17x the health goal |
| Bariumaverage · sampled 2022 · CPP system · 2025 report, page 11 | 0.12 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorideaverage · sampled 2022 · CPP system · 2025 report, page 13 | 81 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorineaverage · range 0.65 to 0.94 · CPP distribution · 2025 report, page 11 | 0.85 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 13 | 0.09 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 3.8 to 12 · CPP distribution · 2025 report, page 10 | 8.9 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 43 to 86 · CPP distribution · 2025 report, page 10 | 67.5 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · sampled 2022 · CPP system · 2025 report, page 11 | 0.26 ppm | 1 ppm | 2 ppm | Below the health goal |
| Nitrate (as N)average · range 0.23 to 0.48 · CPP system · 2025 report, page 11 | 0.35 ppm | 10 ppm | 10 ppm | Below the health goal |
| Perchlorateaverage · range 0.55 to 0.87 · CPP system · 2025 report, page 12 | 0.7 ppb | 1 ppb | 6 ppb | Below the health goal |
| Hardnessaverage · sampled 2022 · CPP system · 2025 report, page 14 | 31 gpg (530 ppm) | — | — | Very hard |
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 Calif State Polytechnical Univ - Pomona’s water between Jun 2026 and Jun 2026. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFHxS5.6 pptFound in 1 of 1 samples · highest resultNo federal limit in force for this one
- PFBS6.3 pptFound in 1 of 1 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.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
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