We read 13 results from Arizona Water Co - Pinal Valley’s 2025 water quality report. No results over a legal limit; 4 above a health goal or guideline.
Serves about 134,432 people · Water system ID AZ0411009 · 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 1.3 to 9.1 · Wells · 2025 report, page 1 | 7.2 ppb | 0.004 ppb | 10 ppb | Above the health goal1,800x the health goal |
| Gross alpha (radioactivity)highest measured · range 0.7 to 9 · Wells · 2025 report, page 1 | 9 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Radium (combined 226 + 228)highest measured · range ND to 0.8 · Wells · 2025 report, page 1 | 0.8 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Total coliform bacteriahighest month · listed as a violation in the report · Distribution system · 2025 report, page 2 | 0.9 % positive | 0 % positive | 5 % positive | Above the health goalThe health goal is zero |
| Bariumhighest measured · range ND to 0.06 · Wells · 2025 report, page 1 | 0.06 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorineaverage · range 0.44 to 2.09 · Distribution system · 2025 report, page 1 | 1.4 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 2 | 0.1 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range ND to 5.6 · Distribution system · 2025 report, page 1 | 4 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 1.4 to 44.7 · Distribution system · 2025 report, page 1 | 38 ppb | None set | 80 ppb | Below the legal limit |
| Lead90th percentile of homes tested, 0 over the action level · Customer taps · 2025 report, page 2 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Lithiumaverage · range 38 to 353 · Wells · 2025 report, page 1 | 224 ppb | None set | None | No health limit |
| PFBS (a PFAS)average · range ND to 91 · Wells · 2025 report, page 1 | 18.8 ppt | None set | None | No health limit |
| Sodiumhighest measured · range 170 to 290 · Wells · 2025 report, page 1 | 290 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. 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 Arizona Water Co - Pinal Valley’s water between Aug 2024 and Feb 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFHxS6.1 pptFound in 4 of 20 samples · highest resultNo federal limit in force for this one
- PFBS91.1 pptFound in 6 of 20 samples · highest resultNo federal limit in force for this one
- Lithium353 ppbFound in 20 of 20 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), Radium (combined 226 + 228)
What removes it: Reverse osmosis.
Bacteria and viruses
Found: Total coliform bacteria
What removes it: UV purification (and tell your utility).
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