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Updated 2026-09-16
State water report

Oklahoma Water Quality: 43 Cities Ranked by the Records

Water quality across 43 cities in Oklahoma, drawn from EPA drinking-water records. Each city page shows the measured contaminants and a reproducible Purity Score.

Finding by finding

What Oklahoma'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. 7 cities have a past health-based violation on record.

PFAS above a 2024 limit

MCL

6of 43 cities

Cities whose system reported a PFAS above its federal limit.

PFOS in Oklahoma →

Nitrate above the MCL

MCL

0of 43 cities

Cities whose system reported nitrate above 10 mg/L.

About nitrate →
City rankings

Oklahoma cities ranked by the records

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

  1. 1
    Oklahoma CityOKLAHOMA CITY · OK1020902
    Report →
  2. 2
    Washington Rwd 3 NewWASHINGTON CO RWD #3 (NEW,#1) · OK1021418
    Report →
  3. 3
    GlenpoolGLENPOOL WATER · OK3007223
    Report →
  4. 4
    WeatherfordWEATHERFORD · OK2002002
    Report →
  5. 5
    TulsaTULSA · OK1020418
    Report →
  6. 6
    Midwest CityMIDWEST CITY · OK1020806
    Report →
  7. 7
    Jenks PwaJENKS PWA · OK3007201
    Report →
  8. 8
    LawtonLAWTON · OK1011303
    Report →
  9. 9
    OwassoOWASSO · OK3007218
    Report →
  10. 10
    Rogers RwdROGERS CO RWD # 5 · OK1021507
    Report →

Showing the top 10 of 43 scored cities.

See all 43 in the table

43 cities, highest Purity Score first

  1. 1Oklahoma City
    OKLAHOMA CITY · PWSID OK1020902 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    PFPeA 4.7 ng/L detected, no federal or state limitDetected
  2. 2Washington Rwd 3 New
    WASHINGTON CO RWD #3 (NEW,#1) · PWSID OK1021418 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  3. 3Glenpool
    GLENPOOL WATER · PWSID OK3007223 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  4. 4Weatherford
    WEATHERFORD · PWSID OK2002002 · Purity Score 100/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  5. 5Tulsa
    TULSA · PWSID OK1020418 · Purity Score 99/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 1.2 µg/LDetected
  6. 6Midwest City
    MIDWEST CITY · PWSID OK1020806 · Purity Score 99/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 1.2 µg/LDetected
  7. 7Jenks Pwa
    JENKS PWA · PWSID OK3007201 · Purity Score 99/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 1.1 µg/LDetected
  8. 8Lawton
    LAWTON · PWSID OK1011303 · Purity Score 98/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 2 µg/LDetected
  9. 9Owasso
    OWASSO · PWSID OK3007218 · Purity Score 97/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detectedNot detected
  10. 10Rogers Rwd
    ROGERS CO RWD # 5 · PWSID OK1021507 · Purity Score 97/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 3 µg/LDetected
  11. 11Guymon
    GUYMON · PWSID OK2007003 · Purity Score 97/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    Past nitrate + nitrite violation on recordNot detected
  12. 12Elk City
    ELK CITY · PWSID OK2000501 · Purity Score 97/100 (Excellent) · Confidence: moderate · Assessed at the water-system level
    No PFAS detected; lead 2.4 µg/LDetected
Showing 12 of 43.

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 Oklahoma compares with other states.

By contaminant

PFAS and lead in Oklahoma

Counties

Oklahoma counties

19 counties with city reports
Show all 19 counties
Suppliers

Largest water systems

  • OKLAHOMA CITYOklahoma City · OK1020902 · 644,000 served
  • TULSATulsa · OK1020418 · 413,000 served
  • BROKEN ARROW MUNICIPAL AUTHORITYBroken Arrow · OK1021508 · 116,330 served
  • NORMAN UTILITIES AUTHORITYNorman · OK1020801 · 104,868 served
  • LAWTONLawton · OK1011303 · 92,757 served
  • EDMOND PWAEdmond · OK1020723 · 79,408 served
All water systems →
Full indexAll 43 Oklahoma 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

Oklahoma water, frequently asked

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How does Oklahoma tap water compare across cities?

PurityMap ranks 43 cities in Oklahoma 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 Oklahoma City's main water system: OKLAHOMA CITY · PWSID OK1020902 · 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 Oklahoma cities have PFAS above the federal limit?

6 cities of 43 had at least one regulated PFAS (PFOA, PFOS or PFHxS) measured above the 2024 federal limit in EPA's UCMR 5 testing, including Broken Arrow (PFOS 51.3 ng/L), Wagoner County Rwd (PFOS 29.5 ng/L), Stillwater (PFOS 8.6 ng/L). PFAS were detected at any level in 14.

Is there lead in Oklahoma tap water?

Utilities report lead as a 90th-percentile result from home taps. 29 of 43 Oklahoma 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 Oklahoma water systems had drinking-water violations?

7 cities in Oklahoma 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