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Updated 2026-09-16
State water report

Arizona Water Quality: 36 Cities Ranked by the Records

Water quality across 36 cities in Arizona, drawn from EPA drinking-water records. Each city page shows the measured contaminants and a reproducible Purity Score.

Finding by finding

What Arizona's records show

Counts of cities whose serving system reported each result. There is no statewide score: PurityMap does not average local records into a statewide safety verdict. 3 cities have a past health-based violation on record.

PFAS above a 2024 limit

MCL

7of 36 cities

Cities whose system reported a PFAS above its federal limit.

PFOS in Arizona →

Hard or very hard

No federal limit

3of 36 cities

Above 120 mg/L as CaCO₃ (7 gpg) on the USGS scale, of 3 cities with a hardness value.

About hard water →
City rankings

Arizona cities ranked by the records

Highest first. A summary of each serving system’s record, not a safety verdict.

  1. 1
    Queen CreekQUEEN CREEK TOWN OF · AZ0407033
    Report →
  2. 2
    Prescott ValleyTOWN OF PRESCOTT VALLEY · AZ0413048
    Report →
  3. 3
    KingmanKINGMAN MUNICIPAL WATER · AZ0408020
    Report →
  4. 4
    Surprise City - Mountain VistaSURPRISE CITY OF - MOUNTAIN VISTA · AZ0407500
    Report →
  5. 5
    Buckeye - Valencia TownCITY OF BUCKEYE - VALENCIA TOWN DIVISION · AZ0407078
    Report →
  6. 6
    Desert OasisDESERT OASIS · AZ0407523
    Report →
  7. 7
    DouglasDOUGLAS CITY OF · AZ0402014
    Report →
  8. 8
    Buckeye Sonora - SundanceCITY OF BUCKEYE SONORA - SUNDANCE · AZ0407154
    Report →
  9. 9
    Buckeye TartessoCITY OF BUCKEYE TARTESSO WATER SYSTEM · AZ0407526
    Report →
  10. 10
    TucsonTUCSON CITY OF · AZ0410112
    Report →

Showing the top 10 of 36 scored cities.

See all 36 in the table

36 cities, highest Purity Score first

  1. 1Queen Creek
    QUEEN CREEK TOWN OF · PWSID AZ0407033 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  2. 2Prescott Valley
    TOWN OF PRESCOTT VALLEY · PWSID AZ0413048 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  3. 3Kingman
    KINGMAN MUNICIPAL WATER · PWSID AZ0408020 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  4. 4Surprise City - Mountain Vista
    SURPRISE CITY OF - MOUNTAIN VISTA · PWSID AZ0407500 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  5. 5Buckeye - Valencia Town
    CITY OF BUCKEYE - VALENCIA TOWN DIVISION · PWSID AZ0407078 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  6. 6Desert Oasis
    DESERT OASIS · PWSID AZ0407523 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  7. 7Douglas
    DOUGLAS CITY OF · PWSID AZ0402014 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  8. 8Buckeye Sonora - Sundance
    CITY OF BUCKEYE SONORA - SUNDANCE · PWSID AZ0407154 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  9. 9Buckeye Tartesso
    CITY OF BUCKEYE TARTESSO WATER SYSTEM · PWSID AZ0407526 · Purity Score 100/100 (Excellent) · Confidence: low · Assessed at the water-system level
    No PFAS detectedNot detected
  10. 10Tucson
    TUCSON CITY OF · PWSID AZ0410112 · Purity Score 99/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    PFBA 8.1 ng/L detected, no federal or state limit; lead 0.65 µg/LDetected
  11. 11Oro Valley
    ORO VALLEY WATER UTILITY · PWSID AZ0410164 · Purity Score 99/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 1 µg/LDetected
  12. 12Show Low
    CITY OF SHOW LOW · PWSID AZ0409026 · Purity Score 99/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
Showing 12 of 36.

Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no state score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works. See how Arizona compares with other states.

By contaminant

PFAS, lead and hard water in Arizona

Counties

Arizona counties

12 counties with city reports
Show all 12 counties
Suppliers

Largest water systems

  • PHOENIX CITY OFPhoenix · AZ0407025 · 1,695,000 served
  • TUCSON CITY OFTucson · AZ0410112 · 732,906 served
  • MESA CITY OFMesa · AZ0407095 · 466,000 served
  • GILBERT, TOWN OFGilbert · AZ0407092 · 247,600 served
  • CHANDLER CITY OFChandler · AZ0407090 · 247,328 served
  • SCOTTSDALE CITY OFScottsdale · AZ0407098 · 241,361 served
All water systems →
Full indexAll 36 Arizona city reports, A–Z
Next step

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Plumbing inside a building can add lead and change what reaches your glass.

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Treat by concern

Only after a city report names a finding, match a treatment certified for it.

Treatment options →
Questions

Arizona water, frequently asked

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How does Arizona tap water compare across cities?

PurityMap ranks 36 cities in Arizona by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is Queen Creek's main water system: QUEEN CREEK TOWN OF · PWSID AZ0407033 · Purity Score 100 (Excellent) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.

How many Arizona cities have PFAS above the federal limit?

7 cities of 36 had at least one regulated PFAS (PFOA, PFOS or PFHxS) measured above the 2024 federal limit in EPA's UCMR 5 testing, including Tempe (PFOS 55.8 ng/L), Payson (PFOS 42.2 ng/L), Avondale (PFOA 13.5 ng/L). PFAS were detected at any level in 18.

Is there lead in Arizona tap water?

Utilities report lead as a 90th-percentile result from home taps. 16 of 36 Arizona cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.

Have Arizona water systems had drinking-water violations?

3 cities in Arizona have a health-based violation in the federal SDWIS record within about the last ten years. Each city report lists the contaminant, year and whether it was resolved.

Does Arizona have hard water?

Hardness is published in utility water-quality reports for 3 Arizona cities on record; the hardest is Phoenix at 14.7 grains per gallon. Hardness affects scale and appliances; it is not a health finding.

Limits, sources and corrections

A statewide page cannot tell you what reaches a specific address. Water quality varies by supplier, sampling period and household plumbing; open a city report for the evidence behind a local result.

Sources: EPA UCMR 5 (PFAS, 2024), SDWIS Lead and Copper Rule 90th-percentile results and health-based violations, and utility Consumer Confidence Reports where on file. Every city report links its dated source records.

Updated 2026-09-16. How PurityMap analyzes water data · Report an error