We read 30 results from City of Anaheim’s 2025 water quality report. No results over a legal limit; 9 above a health goal or guideline.
Serves about 348,593 people · Water system ID CA3010001 · 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 |
|---|---|---|---|---|
| Arsenicaverage · Lenain plant, highest of 2 sources · 2025 report, page 6 | 2.1 ppb | 0.004 ppb | 10 ppb | Above the health goal525x the health goal |
| Bromateaverage · range ND to 24 · Lenain plant, highest of 2 sources · 2025 report, page 6 | 7 ppb | 0.1 ppb | 10 ppb | Above the health goal70x the health goal |
| Chromium-6average · range ND to 1.9 · Groundwater · 2025 report, page 7 | 0.69 ppb | 0.02 ppb | 10 ppb | Above the health goal35x the health goal |
| Gross alpha (radioactivity)average · Lenain plant, highest of 2 sources · 2025 report, page 6 | 5.5 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Perchlorateaverage · range ND to 3.1 · Groundwater · 2025 report, page 6 | 1.1 ppb | 1 ppb | 6 ppb | Above the health goal1.1x the health goal |
| PFOA (a PFAS)average · range ND to 10 · Groundwater · 2025 report, page 7 | 2.3 ppt | 0.007 ppt | 4 ppt from 2029 | Above the health goal329x the health goal |
| PFOS (a PFAS)average · range ND to 29 · Groundwater · 2025 report, page 7 | 4.1 ppt | 1 ppt | 4 ppt from 2029 | Above the federal limit that takes effect in 20291x the 4 ppt federal limit that takes effect in 2029Not a violation yet: EPA's 4 ppt limit is final, but water systems don't have to meet it until 2029. |
| Total dissolved solidsaverage · Lenain plant, highest of 3 sources · 2025 report, page 6 | 640 ppm | — | 500 ppm guideline | Above the guideline1.3x the guideline (taste, odor or stains; not a health limit) |
| Uraniumaverage · range ND to 17.9 · printed as 7.7 pCi/L · Groundwater, highest of 3 sources · 2025 report, page 6 | 11.5 ppb | 0.6 ppb | 30 ppb | Above the health goal19x the health goal |
| 1,1-Dichloroethyleneaverage · range ND to 2 · Groundwater · 2025 report, page 6 | 0.1 ppb | 7 ppb | 7 ppb | Below the health goal |
| Bariumaverage · printed as 150 ppb · Lenain plant, highest of 3 sources · 2025 report, page 6 | 0.15 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorideaverage · Lenain plant, highest of 3 sources · 2025 report, page 6 | 100 ppm | — | 250 ppm guideline | Within the guideline |
| Chlorineaverage · range ND to 3.9 · Distribution system · 2025 report, page 8 | 1.1 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 51 homes tested, 0 over the action level · Customer taps · 2025 report, page 8 | 0.1 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 4.2 to 18 · Distribution system (12 sites) · 2025 report, page 8 | 13 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 15 to 93 · Distribution system (12 sites) · 2025 report, page 8 | 77 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · MWD (imported), highest of 3 sources · 2025 report, page 6 | 0.7 ppm | 1 ppm | 2 ppm | Below the health goal |
| Lead90th percentile of 51 homes tested, 0 over the action level · Customer taps · 2025 report, page 8 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)average · range ND to 5.1 · Groundwater · 2025 report, page 6 | 2.6 ppm | 10 ppm | 10 ppm | Below the health goal |
| PFHxS (a PFAS)average · range ND to 13 · Groundwater · 2025 report, page 7 | 2.1 ppt | None set | 10 ppt from 2029 | Below the legal limit |
| Sulfateaverage · Lenain plant, highest of 3 sources · 2025 report, page 6 | 250 ppm | — | 250 ppm guideline | Within the guideline |
| Trichloroethylene (TCE)average · range ND to 3.4 · Groundwater · 2025 report, page 6 | 0.2 ppb | 1.7 ppb | 5 ppb | Below the health goal |
| Turbidity (cloudiness)highest measured · Lenain plant, highest of 2 sources · 2025 report, page 8 | 0.5 NTU | None set | 1 NTU | Below the legal limit |
| Hardnessaverage · range 9.47 to 25.2 · Groundwater, highest of 3 sources · 2025 report, page 7 | 18.5 gpg (316 ppm) | — | — | Very hard |
| Lithiumaverage · Lenain plant, highest of 3 sources · 2025 report, page 7 | 55 ppb | None set | None | No health limit |
| PFBA (a PFAS)average · range ND to 17 · Groundwater · 2025 report, page 7 | 4.9 ppt | None set | None | No health limit |
| PFBS (a PFAS)average · range ND to 5 · Groundwater · 2025 report, page 7 | Not detected | None set | None | No health limit |
| PFHxA (a PFAS)average · range ND to 8.8 · Groundwater · 2025 report, page 7 | 1.2 ppt | None set | None | No health limit |
| PFPeA (a PFAS)average · range ND to 13 · Groundwater · 2025 report, page 7 | 4.6 ppt | None set | None | No health limit |
| Sodiumaverage · Lenain plant, highest of 3 sources · 2025 report, page 7 | 98 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 Anaheim’s water between Mar 2023 and Apr 2026. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA10.1 pptFound in 4 of 40 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFOS29 pptFound in 6 of 40 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFHxS10.9 pptFound in 6 of 40 samples · highest resultNo federal limit in force for this one
- PFBS3.4 pptFound in 1 of 40 samples · highest resultNo federal limit in force for this one
- Lithium61 ppbFound in 12 of 39 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.
Radium and uranium
Found: Gross alpha (radioactivity), Uranium
What removes it: Reverse osmosis.
Industrial chemicals and pesticides
Found: Perchlorate
What removes it: Carbon block or RO.
PFAS ("forever chemicals")
Found: PFOA (a PFAS), PFOS (a PFAS), PFOA (EPA testing), PFOS (EPA testing)
What removes it: Reverse osmosis.
Salty taste / high TDS
Found: Total dissolved solids
What removes it: Reverse osmosis.
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