We read 9 results from Pima Utilities’s 2022 water quality report. No results over a legal limit; 1 above a health goal or guideline.
Serves about 20,000 people · Water system ID AZ0407120 · Read the district’s 2022 report (opens in a new tab)
Open this district in the water lookupCompare with your own test results, see the district map and get matched filters.
Results from the 2022 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 |
|---|---|---|---|---|
| Gross alpha (radioactivity)highest measured · range 1.3 to 4.4 · sampled 2019 · 2022 report, page 3 | 4.4 pCi/L | 0 pCi/L | 15 pCi/L | Above the health goalThe health goal is zero |
| Bariumhighest measured · range 0.05 to 0.08 · sampled 2020 · 2022 report, page 3 | 0.08 ppm | 2 ppm | 2 ppm | Below the health goal |
| Chlorinehighest measured · range 1 to 1 · 2022 report, page 3 | 1 ppm | None set | 4 ppm | Below the legal limit |
| Chromium (total)highest measured · range 7.1 to 12 · sampled 2020 · 2022 report, page 3 | 12 ppb | None set | 100 ppb | Below the legal limit |
| Copper90th percentile of homes tested, 0 over the action level · Customer taps · 2022 report, page 3 | 0.11 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (TTHM)average · range 1 to 1 · 2022 report, page 3 | 1 ppb | None set | 80 ppb | Below the legal limit |
| Fluoridehighest measured · range 0.58 to 0.72 · printed as 720 ppb · sampled 2020 · 2022 report, page 3 | 0.72 ppm | 1 ppm | 4 ppm | Below the health goal |
| Nitrate (as N)highest measured · range 0.92 to 6.11 · 2022 report, page 3 | 6.11 ppm | 10 ppm | 10 ppm | Below the health goal |
| Sodiumhighest measured · range 160 to 250 · sampled 2020 · 2022 report, page 3 | 250 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 Pima Utilities’s water between Dec 2024 and Sep 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- Lithium381 ppbFound in 6 of 6 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)
What removes it: Reverse osmosis.
More districts: Arizona water quality · All states · Something look wrong? Tell us