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Updated 2026-09-16
State water report

Utah Water Quality: 66 Cities Ranked by the Records

Water quality across 66 cities in Utah, drawn from EPA drinking-water records. Each city page shows the measured contaminants and a reproducible Purity Score.

Finding by finding

What Utah'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. 4 cities have a past health-based violation on record.

PFAS above a 2024 limit

MCL

2of 66 cities

Cities whose system reported a PFAS above its federal limit.

PFOS in Utah →

Lead above action level

Action level

2of 66 cities

Cities whose 90th-percentile result is above 15 µg/L.

How lead is measured →
City rankings

Utah cities ranked by the records

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

  1. 1
    TremontonTREMONTON CITY · UTAH02011
    Report →
  2. 2
    Spanish ForkSPANISH FORK CITY · UTAH25003
    Report →
  3. 3
    SpringvilleSPRINGVILLE CITY · UTAH25005
    Report →
  4. 4
    HurricaneHURRICANE CITY · UTAH27007
    Report →
  5. 5
    ClintonCLINTON CITY WATER SYSTEM · UTAH06003
    Report →
  6. 6
    AlpineALPINE CITY · UTAH25007
    Report →
  7. 7
    VernalVERNAL CITY WATER SYSTEM · UTAH24012
    Report →
  8. 8
    Granger-Hunter Improvement DistrictGRANGER-HUNTER IMPROVEMENT DISTRICT · UTAH18007
    Report →
  9. 9
    St. GeorgeST GEORGE CITY WATER SYSTEM · UTAH27015
    Report →
  10. 10
    OgdenOGDEN CITY WATER SYSTEM · UTAH29011
    Report →

Showing the top 10 of 66 scored cities.

See all 66 in the table

66 cities, highest Purity Score first

  1. 1Tremonton
    TREMONTON CITY · PWSID UTAH02011 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  2. 2Spanish Fork
    SPANISH FORK CITY · PWSID UTAH25003 · Purity Score 99/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 1 µg/LDetected
  3. 3Springville
    SPRINGVILLE CITY · PWSID UTAH25005 · Purity Score 99/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 1.1 µg/LDetected
  4. 4Hurricane
    HURRICANE CITY · PWSID UTAH27007 · Purity Score 99/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 1.29 µg/LDetected
  5. 5Clinton
    CLINTON CITY WATER SYSTEM · PWSID UTAH06003 · Purity Score 99/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 0.8 µg/LDetected
  6. 6Alpine
    ALPINE CITY · PWSID UTAH25007 · Purity Score 99/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 1.2 µg/LDetected
  7. 7Vernal
    VERNAL CITY WATER SYSTEM · PWSID UTAH24012 · Purity Score 99/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 0.7 µg/LDetected
  8. 8Granger-Hunter Improvement District
    GRANGER-HUNTER IMPROVEMENT DISTRICT · PWSID UTAH18007 · Purity Score 98/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 1.9 µg/LDetected
  9. 9St. George
    ST GEORGE CITY WATER SYSTEM · PWSID UTAH27015 · Purity Score 98/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 1.4 µg/LDetected
  10. 10Ogden
    OGDEN CITY WATER SYSTEM · PWSID UTAH29011 · Purity Score 98/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 1.9 µg/LDetected
  11. 11Kearns Improvement District
    KEARNS IMPROVEMENT DISTRICT · PWSID UTAH18011 · Purity Score 98/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 1.3 µg/LDetected
  12. 12Magna District
    MAGNA WATER DISTRICT · PWSID UTAH18014 · Purity Score 98/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 1.7 µg/LDetected
Showing 12 of 66.

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 Utah compares with other states.

By contaminant

PFAS and lead in Utah

Counties

Utah counties

10 counties with city reports
Suppliers

Largest water systems

All water systems →
Full indexAll 66 Utah city reports, A–Z
Next step

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

How to test →
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Treat by concern

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

Treatment options →
Questions

Utah water, frequently asked

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How does Utah tap water compare across cities?

PurityMap ranks 66 cities in Utah 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 Tremonton's main water system: TREMONTON CITY · PWSID UTAH02011 · 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 Utah cities have PFAS above the federal limit?

2 cities of 66 had at least one regulated PFAS (PFOA, PFOS or PFHxS) measured above the 2024 federal limit in EPA's UCMR 5 testing, including Salt Lake City (PFHxS 18.2 ng/L), South Davis District (PFHxS 12 ng/L). PFAS were detected at any level in 13.

Is there lead in Utah tap water?

Utilities report lead as a 90th-percentile result from home taps. 64 of 66 Utah cities reported a value above zero, and 2 cities were 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 Utah water systems had drinking-water violations?

4 cities in Utah 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.

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