We read 16 results from Epcor - Anthem’s 2025 water quality report. No results over a legal limit; 5 above a health goal or guideline.
Serves about 23,826 people · Water system ID AZ0407504 · 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 |
|---|---|---|---|---|
| Arsenichighest measured · range 3 to 3.7 · Anthem Treatment Facility · 2025 report, page 8 | 3.7 ppb | 0.004 ppb | 10 ppb | Above the health goal925x the health goal |
| Copper90th percentile of 30 homes tested, 0 over the action level · sampled 2023 · Customer taps · 2025 report, page 9 | 0.39 ppm | 0.3 ppm | 1.3 ppm (action level) | Above the health goal1.3x the health goal |
| Gross alpha (radioactivity)highest measured · sampled 2020 · Anthem Treatment Facility · 2025 report, page 8 | 2.2 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Total dissolved solidsas reported · sampled 2024 · Anthem Treatment Facility · 2025 report, page 10 | 640 ppm | — | 500 ppm guideline | Above the guideline1.3x the guideline (taste, odor or stains; not a health limit) |
| Uraniumhighest measured · sampled 2020 · Anthem Treatment Facility · 2025 report, page 8 | 1.8 ppb | 0.6 ppb | 30 ppb | Above the health goal3x the health goal |
| Bariumhighest measured · range 0.02 to 0.13 · Anthem Treatment Facility · 2025 report, page 8 | 0.13 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorinehighest running annual average · range 0.46 to 1.02 · Distribution system · 2025 report, page 9 | 0.74 ppm | None set | 4 ppm | Below the legal limit |
| Disinfection byproducts (HAA5)highest running annual average · range 12.3 to 27.1 · Distribution system · 2025 report, page 9 | 21.7 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 42.5 to 81.4 · Distribution system · 2025 report, page 9 | 67.1 ppb | None set | 80 ppb | Below the legal limit |
| Nitrate (as N)highest measured · range ND to 4.11 · Anthem Treatment Facility · 2025 report, page 8 | 4.11 ppm | 10 ppm | 10 ppm | Below the health goal |
| pHas reported · sampled 2024 · Anthem Treatment Facility · 2025 report, page 10 | 8.2 | — | — | Normal range |
| Alkalinityas reported · sampled 2024 · Anthem Treatment Facility · 2025 report, page 10 | 127 ppm | None set | None | No health limit |
| Calciumas reported · sampled 2024 · Anthem Treatment Facility · 2025 report, page 10 | 80 ppm | None set | None | No health limit |
| Lithiumhighest measured · range 67.2 to 72.3 · sampled 2024 · Anthem Treatment Facility · 2025 report, page 9 | 72.3 ppb | None set | None | No health limit |
| Magnesiumas reported · sampled 2024 · Anthem Treatment Facility · 2025 report, page 10 | 29 ppm | None set | None | No health limit |
| Sodiumhighest measured · range 21 to 110 · Anthem Treatment Facility · 2025 report, page 8 | 110 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. 2 numbers we weren’t sure about are held back until a person checks.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in Epcor - Anthem’s water between Nov 2023 and Aug 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium72.3 ppbFound in 4 of 4 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.
Copper
Found: Copper
What removes it: Reverse osmosis.
Radium and uranium
Found: Gross alpha (radioactivity), Uranium
What removes it: Reverse osmosis.
Salty taste / high TDS
Found: Total dissolved solids
What removes it: Reverse osmosis.
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