Is Tahlequah Tap Water Safe? 2026 Water Quality Report
Short answer: No measured result is above a legal limit. Tahlequah Pwa serves 14,458 residents.
TAHLEQUAH PWA serves Tahlequah
Your water bill or annual water quality report names your actual supplier.
- Source
- Surface water
- Lead service lines
- 0 lead, 7,108 unknown
- TAHLEQUAH PWAThis reportOK1021701 · 14,458 served
3 detected results, by distance from their limit
TAHLEQUAH PWA (EPA PWSID OK1021701) delivers surface water to 14,458 residents. This report reflects 29 individual PFAS result(s) from the source UCMR5 observations and the latest Lead & Copper Rule 90th-percentile result. Water hardness and disinfectant type are pending the utility's own annual report.
- Perfluorobutanesulfonic acid (PFBS)EPA UCMR 5 · 20232,000 ng/L EPA health advisory (screening, not a legal limit)5.7ng/LWithin reference
- Perfluorohexanoic acid (PFHxA)EPA UCMR 5 · 2023400,000 ng/L Michigan EGLE state MCL (strictest US state)4.2ng/LWithin reference
- Perfluoropentanoic acid (PFPeA)EPA UCMR 5 · 2023No federal or state limit; shown for transparency4.4ng/LDetected · no limit
28 other contaminants tested, none detected
- 11Cl-PF3OUdS
- 4:2 FTS
- 6:2 FTS
- 8:2 FTS
- 9Cl-PF3ONS
- ADONA
- HFPO-DA (GenX)
- NEtFOSAA
- NFDHA
- NMeFOSAA
- PFBA
- PFDA
- PFDoA
- PFEESA
- PFHpA
- PFHpS
- PFHxS
- PFMBA
- PFMPA
- PFNA
- PFOA
- PFOS
- PFPeS
- PFTA
- PFTrDA
- PFUnA
- Lithium
- Lead (90th percentile)
Coverage by group
31 results on record- PFAS (forever chemicals)3 detected · 26 not detected
- Metals & lead1 not detected
- Disinfection by-productsNot monitored
- Other1 not detected
6health-based violations in the last 10 years
From EPA SDWIS. Counted once per contaminant per year, as in the Track record score. All 10 EPA filings are listed below.
No result is not a pass. Your utility's annual water quality report may list them, and a certified lab test covers your own tap.
Health-based violations, last 10 years
Every filing is listed; the Track record score counts at most one per contaminant per year.
- Lead and copper rule revisions
- Total Haloacetic Acids (HAA5)
- Long Term 2 Enhanced Surface Water Treatment Rule
- TTHM
Resolved
- Lead and copper rule revisionsTT
to Resolved
- Total Haloacetic Acids (HAA5)MCL
to Resolved
- Total Haloacetic Acids (HAA5)MCL
to Resolved
- Long Term 2 Enhanced Surface Water Treatment RuleTT
to Resolved
- Long Term 2 Enhanced Surface Water Treatment RuleTT
to Resolved
- Long Term 2 Enhanced Surface Water Treatment RuleTT
to Resolved
- Total Haloacetic Acids (HAA5)MCL
to Resolved
- Total Haloacetic Acids (HAA5)MCL
to Resolved
- TTHMMCL
to Resolved
- Total Haloacetic Acids (HAA5)MCL
to Resolved
Test first, then treat what was found
- 01 · TestTest your own tap
A tap test can confirm levels at your home before you choose treatment.
Certified labHow to test your tap → - 02 · PFASReverse osmosis, or carbon certified for PFAS
PFBS 5.7 ng/L, below the 2000 ng/L EPA health advisory (+2 more PFAS detected)
NSF/ANSI 58 or 53, with PFBS/PFHxA/PFPeA named on the listingTreatment for PFAS →
No certified match for these concerns yet
Each card names which Tahlequah findings its current certification covers, and which it doesn't.
As an Amazon Associate, PurityMap earns from qualifying purchases. A product appears here only when a current certification record covers at least one identified concern; every concern stays listed. The retail offer is looked up afterwards and never changes which products appear or their order. Affiliate disclosure.
No product in our catalogue has verified certification for these concerns yet.
Frequently asked questions
Is Tahlequah tap water safe to drink?
PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For Tahlequah, PFAS were detected below their limits, and PFPeA 4.4 ng/L with no federal or state limit. TAHLEQUAH PWA (PWSID OK1021701) has a Purity Score of 91/100 (confidence: moderate), assessed at the water-system level and computed only from contaminants that were measured. Water can change in your own pipes, so a certified test is the only way to know what comes out of your tap.
Who provides tap water in Tahlequah?
TAHLEQUAH PWA (PWS ID OK1021701) is the public water system on record for Tahlequah, Oklahoma, serving about 14,458 people. Confirm the utility on your water bill before acting on a specific finding.
Where does Tahlequah get its drinking water?
Surface water (primary source of record in EPA SDWIS).
Are PFAS "forever chemicals" in Tahlequah's water?
In EPA's UCMR 5 testing (2023-06-06 to 2024-03-05), PFBS was detected at 5.7 ng/L, below the 2,000 ng/L EPA health advisory and PFHxA was detected at 4.2 ng/L, below the 400,000 ng/L state limit. PFPeA (4.4 ng/L) was also detected; it has no federal or state limit.
Is there lead in Tahlequah's tap water?
Lead is not in Tahlequah's current published record. Lead usually enters from a building's own pipes and fixtures, so a certified home test is the way to know yours.
What does the latest Tahlequah water report show?
PurityMap's current record for Tahlequah holds 31 findings: 2 detected within the reference, 1 detected with no limit and 28 not detected. Each finding links to its dated public record; a parameter that was never monitored is shown as pending, not as a pass.
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Sources and dataAll 31 records and their sourcesEPA UCMR 5 · EPA SDWIS (Lead & Copper Rule)
| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorobutanesulfonic acid (PFBS) | 5.7 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Within the referenced health-based guidance value | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| Perfluorohexanoic acid (PFHxA) | 4.2 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| Perfluoropentanoic acid (PFPeA) | 4.4 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
28 other contaminants tested — none detected
| Contaminant | Result | Benchmark | Status | Sampled | Source |
|---|---|---|---|---|---|
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| Lead (90th percentile) | Non-Detect (ND) | 15 µg/L federal action level | Not detected above the reporting limit | 2021–2023 monitoring period | Lead & Copper Rule 90th-percentile: TAHLEQUAH PWA (OK1021701) |
| Lithium | < 9 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-06-06 to 2024-03-05 | UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701) |
Perfluorobutanesulfonic acid (PFBS)
- Result
- 5.7 ng/L
- Benchmark
- 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit
- Status
- Within the referenced health-based guidance value
- Sampled
- 2023-06-06 to 2024-03-05
Perfluorohexanoic acid (PFHxA)
- Result
- 4.2 ng/L
- Benchmark
- 400,000 ng/L Michigan EGLE state MCL (strictest US state)
- Status
- Within a historical reference; current applicability unverified
- Sampled
- 2023-06-06 to 2024-03-05
Perfluoropentanoic acid (PFPeA)
- Result
- 4.4 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Detected, no limit
- Sampled
- 2023-06-06 to 2024-03-05
28 other contaminants tested — none detected
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
- Result
- < 5 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
- Result
- < 5 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
- Result
- < 5 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
- Result
- < 2 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
- Result
- < 5 ng/L
- Benchmark
- 10 ng/L federal MCL (2024)
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
- Result
- Non-Detect (ND)
- Benchmark
- 15 µg/L federal action level
- Status
- Not detected above the reporting limit
- Sampled
- 2021–2023 monitoring period
- Result
- < 9 µg/L
- Benchmark
- 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
- Result
- < 5 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
- Result
- < 6 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
- Result
- < 20 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
Perfluoro-3-methoxypropanoic acid (PFMPA)
- Result
- < 4 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
Perfluoro-4-methoxybutanoic acid (PFMBA)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
- Result
- < 5 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
Perfluorododecanoic acid (PFDoA)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
Perfluoroheptanesulfonic acid (PFHpS)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
Perfluoroheptanoic acid (PFHpA)
- Result
- < 3 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
Perfluorohexanesulfonic acid (PFHxS)
- Result
- < 3 ng/L
- Benchmark
- 10 ng/L federal MCL (2024)
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
- Result
- < 4 ng/L
- Benchmark
- 10 ng/L federal MCL (2024)
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
Perfluorooctanesulfonic acid (PFOS)
- Result
- < 4 ng/L
- Benchmark
- 4.0 ng/L federal MCL (2024)
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
- Result
- < 4 ng/L
- Benchmark
- 4.0 ng/L federal MCL (2024)
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
Perfluoropentanesulfonic acid (PFPeS)
- Result
- < 4 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
Perfluorotetradecanoic acid (PFTA)
- Result
- < 8 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
Perfluorotridecanoic acid (PFTrDA)
- Result
- < 7 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
Perfluoroundecanoic acid (PFUnA)
- Result
- < 2 ng/L
- Benchmark
- No federal or state limit; shown for transparency
- Status
- Not detected above the reporting limit
- Sampled
- 2023-06-06 to 2024-03-05
Every value is the published result from the cited public record. A reporting limit is the lowest level the method could reliably quantify; a non-detect is not a guarantee of zero.
UCMR5 Analytical Results
UCMR5 Analytical Results: TAHLEQUAH PWA (OK1021701)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: TAHLEQUAH PWA (OK1021701)
US EPA SDWIS
Methodology: how we analyze water. Prepared with AI assistance and reviewed by the PurityMap Editorial Team before publication.
Something off with your water's smell, color or taste?
Start with the hot-or-cold tap check. Where Tahlequah Pwa reported something related, it's shown below.
- Rotten-egg smell
- Cloudy or milky water
- Chlorine smell
- Brown or yellow water
- Metallic taste
Lead at Tahlequah Pwa: not detected (90th percentile, 2021–2023 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.
ZIP codes in Tahlequah
A ZIP code is a postal area, not a water service area. Your water bill names your supplier.