Tap water · AZ
Phoenix Water Services Department
EPA system ID AZ0407025 · serves about 1,695,000 people. Every US utility must publish an annual water quality report — here’s the official one (2025), and below it, our plain-English translation.
Read the official report →What Phoenix Water Services Department found in 2025
14 detected analytes from the utility’s own annual report, hand-normalized — nothing was near or over a federal health-based limit.
| Detected | Level | Limit | % of limit | Status |
|---|---|---|---|---|
| Arsenic | 7 ppb | 10 ppb | 70% | Within limit |
| Chlorine Dioxide | 540 ppb | 800 ppb | 68% | Within limit |
| Total Trihalomethanes (TTHMs) | 49 ppb | 80 ppb | 61% | Within limit |
| Nitrate*** (as N) | 3.8 ppm | 10 ppm | 38% | Within limit |
| Chlorite | 0.3 ppm | 1 ppm | 30% | Within limit |
| Haloacetic Acids (HAA) | 17 ppb | 60 ppb | 28% | Within limit |
| Copper (90th percentile) | 0.3 ppm | 1.3 ppm | 23% | Within limit |
| Chlorine | 0.84 ppm | 4 ppm | 21% | Within limit |
| Lead (90th percentile) | 3 ppb | 15 ppb | 20% | Within limit |
| Xylenes | 0.003 ppm | 10 ppm | 0% | Within limit |
| Lithium — 2023 monitoring | 70.2 ppb | — | — | No federal limit |
| Total Organic Carbon Removal Ratio | 1.3 NA | — | — | No federal limit |
| perfluorobutanesulfonic acid (PFBS) — 2023 monitoring | 0.011 ppb | — | — | No federal limit |
| perfluorobutanoic acid (PFBA) — 2023 monitoring | 0.005 ppb | — | — | No federal limit |
Levels and limits are as printed in the utility’s report (“limit” is the EPA MCL, action level, residual limit, or secondary guideline that applies to that row; “ND” = not detected). Utilities publish these reports annually — we re-check every covered utility each July, after the federal publication deadline. Detected doesn’t mean dangerous — most detections sit far below their limits. This is education, not medical advice.
Zip codes covered
85003 · 85004 · 85006 · 85007 · 85008 · 85009 · 85012 · 85013 · 85014 · 85015 · 85016 · 85017 · 85018 · 85019 · 85020 · 85021 · 85022 · 85023 · 85024 · 85026 · 85027 · 85028 · 85029 · 85031 · 85032 · 85033 · 85034 · 85035 · 85037 · 85040 · 85041 · 85042 · 85043 · 85044 · 85045 · 85048 · 85050 · 85051 · 85053 · 85054 · 85083 · 85085
Boundary zips partially served by other systems are deliberately unlisted — check your exact zip.