We read 11 results from Liberty Water Rio Rico’s 2025 water quality report. No results over a legal limit; 3 above a health goal or guideline.
Serves about 17,960 people · Water system ID AZ0412011 · 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 · range 3.1 to 6.1 · sampled 2022 · 2025 report, page 7 | 4.1 ppb | 0.004 ppb | 10 ppb | Above the health goal1,025x the health goal |
| Gross alpha (radioactivity)average · 2025 report, page 7 | 0.08 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Uraniumaverage · 2025 report, page 7 | 6.6 ppb | 0.6 ppb | 30 ppb | Above the health goal11x the health goal |
| Bariumaverage · range ND to 0.06 · sampled 2022 · 2025 report, page 7 | 0.008 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorineaverage · range 0.71 to 1.08 · 2025 report, page 6 | 0.93 ppm | None set | 4 ppm | Below the legal limit |
| Chromium (total)average · range ND to 2.2 · sampled 2022 · 2025 report, page 7 | 1.1 ppb | None set | 100 ppb | Below the legal limit |
| Copper90th percentile of 30 homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 7 | 0.12 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (TTHM)average · range 2.14 to 14 · 2025 report, page 6 | 8.05 ppb | None set | 80 ppb | Below the legal limit |
| Lead90th percentile of 30 homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 7 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Nitrate (as N)average · range 0.79 to 6.11 · 2025 report, page 7 | 3.6 ppm | 10 ppm | 10 ppm | Below the health goal |
| Sodiumaverage · range 26 to 42 · sampled 2024 · 2025 report, page 7 | 34.8 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 Rio Rico’s water between Apr 2023 and Apr 2024. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA10 pptFound in 4 of 12 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFOS40.9 pptFound in 6 of 12 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFHxS10.9 pptFound in 6 of 12 samples · highest resultNo federal limit in force for this one
- PFBS20 pptFound in 6 of 12 samples · highest resultNo federal limit in force for this one
- Lithium20.2 ppbFound in 12 of 12 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.
PFAS ("forever chemicals")
Found: PFOA (EPA testing), PFOS (EPA testing)
What removes it: Reverse osmosis.
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