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Updated 2026-09-16
State water report

Oregon Water Quality: 64 Cities Ranked by the Records

Water quality across 64 cities in Oregon, drawn from EPA drinking-water records. Each city page shows the measured contaminants and a reproducible Purity Score.

Finding by finding

What Oregon'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.

PFAS above a 2024 limit

MCL

6of 64 cities

Cities whose system reported a PFAS above its federal limit.

PFOS in Oregon →
City rankings

Oregon cities ranked by the records

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

  1. 1
    MedfordMEDFORD WATER COMMISSION · OR4100513
    Report →
  2. 2
    HillsboroHILLSBORO, CITY OF · OR4101513
    Report →
  3. 3
    AlbanyALBANY, CITY OF · OR4100012
    Report →
  4. 4
    Lake OswegoLAKE OSWEGO MUNICIPAL WATER · OR4100457
    Report →
  5. 5
    RedmondREDMOND WATER DEPARTMENT · OR4100693
    Report →
  6. 6
    Grants PassGRANTS PASS, CITY OF · OR4100342
    Report →
  7. 7
    RoseburgROSEBURG, CITY OF · OR4100720
    Report →
  8. 8
    CorneliusCORNELIUS, CITY OF · OR4100218
    Report →
  9. 9
    La GrandeLA GRANDE, CITY OF · OR4100453
    Report →
  10. 10
    DallesTHE DALLES, CITY OF · OR4100869
    Report →

Showing the top 10 of 64 scored cities.

See all 64 in the table

64 cities, highest Purity Score first

  1. 1Medford
    MEDFORD WATER COMMISSION · PWSID OR4100513 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  2. 2Hillsboro
    HILLSBORO, CITY OF · PWSID OR4101513 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  3. 3Albany
    ALBANY, CITY OF · PWSID OR4100012 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  4. 4Lake Oswego
    LAKE OSWEGO MUNICIPAL WATER · PWSID OR4100457 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  5. 5Redmond
    REDMOND WATER DEPARTMENT · PWSID OR4100693 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  6. 6Grants Pass
    GRANTS PASS, CITY OF · PWSID OR4100342 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  7. 7Roseburg
    ROSEBURG, CITY OF · PWSID OR4100720 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  8. 8Cornelius
    CORNELIUS, CITY OF · PWSID OR4100218 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  9. 9La Grande
    LA GRANDE, CITY OF · PWSID OR4100453 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  10. 10Dalles
    THE DALLES, CITY OF · PWSID OR4100869 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 0.21 µg/LDetected
  11. 11Monmouth
    MONMOUTH, CITY OF · PWSID OR4100537 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  12. 12Baker City
    BAKER CITY · PWSID OR4100073 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
Showing 12 of 64.

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 Oregon compares with other states.

By contaminant

PFAS and lead in Oregon

Counties

Oregon counties

21 counties with city reports
Show all 21 counties
Suppliers

Largest water systems

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Full indexAll 64 Oregon city reports, A–Z
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Questions

Oregon water, frequently asked

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How does Oregon tap water compare across cities?

PurityMap ranks 64 cities in Oregon 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 Medford's main water system: MEDFORD WATER COMMISSION · PWSID OR4100513 · 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 Oregon cities have PFAS above the federal limit?

6 cities of 64 had at least one regulated PFAS (PFOA, PFOS or PFHxS) measured above the 2024 federal limit in EPA's UCMR 5 testing, including Hermiston (PFOS 12 ng/L), Klamath Falls (PFOS 9.5 ng/L), Bend (PFOA 7.9 ng/L). PFAS were detected at any level in 12.

Is there lead in Oregon tap water?

Utilities report lead as a 90th-percentile result from home taps. 47 of 64 Oregon 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.

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