We read 18 results from Liberty Water Lpsco’s 2025 water quality report. No results over a legal limit; 8 above a health goal or guideline.
Serves about 50,770 people · Water system ID AZ0407046 · 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 running annual average · range ND to 9.3 · listed as a violation in the report · Wells · 2025 report, page 7 | 8 ppb | 0.004 ppb | 10 ppb | Above the health goal2,000x the health goal |
| Fluoridehighest measured · range ND to 1.64 · listed as a violation in the report · sampled 2024 · Wells · 2025 report, page 7 | 1.64 ppm | 1 ppm | 4 ppm | Above the health goal1.6x the health goal |
| Gross alpha (radioactivity)highest measured · range ND to 3.4 · listed as a violation in the report · Wells · 2025 report, page 7 | 3 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| PFHxS (a PFAS)highest measured · range ND to 35 · Wells · 2025 report, page 8 | 35 ppt | None set | 10 ppt from 2029 | Above the federal limit that takes effect in 20293.5x the 10 ppt federal limit that takes effect in 2029Not a violation yet: EPA's 10 ppt limit is final, but water systems don't have to meet it until 2029. |
| PFOA (a PFAS)highest measured · range ND to 23 · Wells · 2025 report, page 9 | 23 ppt | 0.007 ppt | 4 ppt from 2029 | Above the federal limit that takes effect in 20295.8x 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. |
| PFOS (a PFAS)highest measured · range ND to 39 · Wells · 2025 report, page 9 | 39 ppt | 1 ppt | 4 ppt from 2029 | Above the federal limit that takes effect in 20299.8x 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. |
| Radium (combined 226 + 228)highest measured · range ND to 0.83 · listed as a violation in the report · Wells · 2025 report, page 7 | 0.83 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Uraniumhighest measured · range ND to 4.2 · listed as a violation in the report · Wells · 2025 report, page 7 | 4.2 ppb | 0.6 ppb | 30 ppb | Above the health goal7x the health goal |
| Chlorinehighest measured · range 1 to 1 · listed as a violation in the report · Distribution system · 2025 report, page 6 | 1 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · listed as a violation in the report · sampled 2023 · Customer taps · 2025 report, page 6 | 0.15 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest measured · range 1.3 to 2.8 · listed as a violation in the report · Distribution system · 2025 report, page 6 | 2 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest measured · range 8.9 to 19 · listed as a violation in the report · Distribution system · 2025 report, page 6 | 16 ppb | None set | 80 ppb | Below the legal limit |
| Lead90th percentile of homes tested, 0 over the action level · listed as a violation in the report · sampled 2023 · Customer taps · 2025 report, page 6 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)highest measured · range 4.13 to 8 · listed as a violation in the report · Wells · 2025 report, page 7 | 8 ppm | 10 ppm | 10 ppm | Below the health goal |
| Hardnesshighest measured · range 8.77 to 21.1 · Wells · 2025 report, page 8 | 13.6 gpg (233 ppm) | — | — | Very hard |
| PFBS (a PFAS)highest measured · range ND to 21 · Wells · 2025 report, page 8 | 21 ppt | None set | None | No health limit |
| PFHxA (a PFAS)highest measured · range ND to 55 · Wells · 2025 report, page 9 | 55 ppt | None set | None | No health limit |
| Sodiumhighest measured · range 65 to 210 · Wells · 2025 report, page 8 | 120 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 Liberty Water Lpsco’s water between Sep 2023 and Apr 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA10.2 pptFound in 8 of 14 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFOS14.1 pptFound in 10 of 14 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFHxS18.9 pptFound in 13 of 14 samples · highest resultNo federal limit in force for this one
- PFBS8.4 pptFound in 7 of 14 samples · highest resultNo federal limit in force for this one
- Lithium166 ppbFound in 14 of 14 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.
Fluoride
Found: Fluoride
What removes it: Reverse osmosis.
Radium and uranium
Found: Gross alpha (radioactivity), Radium (combined 226 + 228), Uranium
What removes it: Reverse osmosis.
PFAS ("forever chemicals")
Found: PFHxS (a PFAS), PFOA (a PFAS), PFOS (a PFAS), PFOA (EPA testing), PFOS (EPA testing)
What removes it: Reverse osmosis.
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