We read 15 results from City of Brea’s 2025 water quality report. No results over a legal limit; 5 above a health goal or guideline.
Serves about 48,479 people · Water system ID CA3010002 · 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 2.4 to 2.7 · listed as a violation in the report · Imported groundwater · 2025 report, page 5 | 2.6 ppb | 0.02 ppb | 10 ppb | Above the health goal130x the health goal |
| Perchlorateaverage · range ND to 5.7 · listed as a violation in the report · Imported groundwater · 2025 report, page 5 | 2.1 ppb | 1 ppb | 6 ppb | Above the health goal2.1x the health goal |
| Tetrachloroethylene (PCE)average · range 0.69 to 3.4 · listed as a violation in the report · Imported groundwater · 2025 report, page 5 | 2 ppb | 0.06 ppb | 5 ppb | Above the health goal33x the health goal |
| Trichloroethylene (TCE)average · range 0.63 to 4 · listed as a violation in the report · Imported groundwater · 2025 report, page 5 | 2.7 ppb | 1.7 ppb | 5 ppb | Above the health goal1.6x the health goal |
| Uraniumaverage · range 3.43 to 4.77 · listed as a violation in the report · printed as 2.7 pCi/L · sampled 2024 · Imported groundwater · 2025 report, page 5 | 4.02 ppb | 0.6 ppb | 30 ppb | Above the health goal6.7x the health goal |
| Bariumaverage · range 0.12 to 0.12 · listed as a violation in the report · Imported groundwater · 2025 report, page 5 | 0.12 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorideaverage · range 18 to 24 · listed as a violation in the report · Imported groundwater · 2025 report, page 5 | 21 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorineaverage · range 0.39 to 1.64 · listed as a violation in the report · Distribution system · 2025 report, page 4 | 1.23 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 32 homes tested, 0 over the action level · listed as a violation in the report · sampled 2023 · Customer taps · 2025 report, page 4 | 0.23 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)average · range ND to 5.3 · listed as a violation in the report · Distribution system · 2025 report, page 4 | 5 ppb | None set | 60 ppb | Below the legal limit |
| Fluorideaverage · range 0.26 to 0.35 · listed as a violation in the report · Imported groundwater · 2025 report, page 5 | 0.31 ppm | 1 ppm | 2 ppm | Below the health goal |
| Lead90th percentile of 32 homes tested, 1 over the action level · listed as a violation in the report · sampled 2023 · Customer taps · 2025 report, page 4 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)average · range 2.2 to 4.4 · listed as a violation in the report · Imported groundwater · 2025 report, page 5 | 3.4 ppm | 10 ppm | 10 ppm | Below the health goal |
| Total dissolved solidsaverage · range 300 to 360 · listed as a violation in the report · Imported groundwater · 2025 report, page 5 | 330 ppm | — | 500 ppm guideline | Within the guideline |
| Sodiumaverage · range 16 to 19 · Imported groundwater · 2025 report, page 5 | 18 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. 1 number we weren’t sure about is held back until a person checks.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in City of Brea’s water between Jan 2023 and Oct 2023. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium56.2 ppbFound in 3 of 10 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.
Industrial chemicals and pesticides
Found: Perchlorate, Tetrachloroethylene (PCE), Trichloroethylene (TCE)
What removes it: Carbon block or RO.
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