We read 10 results from City of La Habra’s 2024 water quality report. No results over a legal limit; 2 above a health goal or guideline.
Serves about 63,118 people · Water system ID CA3010018 · 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 |
|---|---|---|---|---|
| Chromium-6average · listed as a violation in the report · Groundwater · 2024 report, page 7 | 1.5 ppb | 0.02 ppb | 10 ppb | Above the health goal75x the health goal |
| Uraniumaverage · listed as a violation in the report · printed as 2.1 pCi/L · Groundwater · 2024 report, page 7 | 3.13 ppb | 0.6 ppb | 30 ppb | Above the health goal5.2x the health goal |
| Chlorineaverage · range 0.08 to 2.7 · listed as a violation in the report · Distribution system · 2024 report, page 6 | 1.1 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 30 homes tested, 0 over the action level · listed as a violation in the report · Customer taps · 2024 report, page 6 | 0.23 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)average · range 1 to 8.8 · listed as a violation in the report · Distribution system · 2024 report, page 6 | 7 ppb | None set | 60 ppb | Below the legal limit |
| Fluorideaverage · listed as a violation in the report · Groundwater · 2024 report, page 7 | 0.35 ppm | 1 ppm | 2 ppm | Below the health goal |
| Lead90th percentile of 30 homes tested, 0 over the action level · listed as a violation in the report · Customer taps · 2024 report, page 6 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)average · listed as a violation in the report · Groundwater · 2024 report, page 7 | 1.8 ppm | 10 ppm | 10 ppm | Below the health goal |
| Trichloroethylene (TCE)average · listed as a violation in the report · Groundwater · 2024 report, page 7 | 0.75 ppb | 1.7 ppb | 5 ppb | Below the health goal |
| Turbidity (cloudiness)highest measured · listed as a violation in the report · MWD Diemer plant · 2024 report, page 8 | 0.06 NTU | None set | 1 NTU | Below the legal 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 La Habra’s water between Jan 2025 and Oct 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium56.3 ppbFound in 3 of 7 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.
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