Cherokee County Water Quality

Name: Cherokee County Water Quality Data (2026)
Creator: PurityMap
License: https://creativecommons.org/licenses/by/4.0/

Cherokee County, Oklahoma: one city report built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.

Find my system Open on the map

Across the county's systems

Highest result for each contaminant

One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.

Perfluorobutanesulfonic acid (PFBS)TAHLEQUAH PWA2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPA5.7 ng/L

TAHLEQUAH PWA5.7 ng/LSample date: 2023-06-06 to 2024-03-05

Perfluorohexanoic acid (PFHxA)TAHLEQUAH PWA400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLE4.2 ng/L

TAHLEQUAH PWA4.2 ng/LSample date: 2023-06-06 to 2024-03-05

Perfluoropentanoic acid (PFPeA)TAHLEQUAH PWANo federal or state limit; shown for transparency4.4 ng/L

TAHLEQUAH PWA4.4 ng/LSample date: 2023-06-06 to 2024-03-05

28 substances tested, none detected in this systemShow

Tested in this system: TAHLEQUAH PWA

11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
Lead (90th percentile)
Lithium
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
Perfluoro-3-methoxypropanoic acid (PFMPA)
Perfluoro-4-methoxybutanoic acid (PFMBA)
Perfluorobutanoic acid (PFBA)
Perfluorodecanoic acid (PFDA)
Perfluorododecanoic acid (PFDoA)
Perfluoroheptanesulfonic acid (PFHpS)
Perfluoroheptanoic acid (PFHpA)
Perfluorohexanesulfonic acid (PFHxS)
Perfluorononanoic acid (PFNA)
Perfluorooctanesulfonic acid (PFOS)
Perfluorooctanoic acid (PFOA)
Perfluoropentanesulfonic acid (PFPeS)
Perfluorotetradecanoic acid (PFTA)
Perfluorotridecanoic acid (PFTrDA)
Perfluoroundecanoic acid (PFUnA)

1 city

Cities ranked by the records

1
TahlequahTAHLEQUAH PWA
PFAS detected, within limit
Open city report →

Showing 1 of 1 cities · scores are system-level, not tap tests

Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county 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.

PFAS in Cherokee CountyPFAS detected in 1 of 1 city; none above a federal limit

4.0 ng/L federal MCL · PFOS, ng/LPFAS in Oklahoma

Lead

0of 1 city above the 15 µg/L action level

Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.

Lead in Oklahoma

Who supplies the county

Largest water systems

TahlequahTAHLEQUAH PWA · OK1021701
14,458 served

Questions

Frequently asked

How does Cherokee County tap water compare across cities?

PurityMap ranks 1 city in Cherokee County 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 Tahlequah's main water system: TAHLEQUAH PWA · PWSID OK1021701 · Purity Score 91 (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 Cherokee County cities have PFAS above the federal limit?

None of the 1 Cherokee County cities on record had a regulated PFAS above the 2024 federal limit in EPA's UCMR 5 testing. PFAS were detected below the limit in 1.

Is there lead in Cherokee County tap water?

Utilities report lead as a 90th-percentile result from home taps. 0 of 1 Cherokee County 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.

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