PFAS concern carried

Frankfort, KY · PFAS · forever chemicals

Is There PFAS in Frankfort Tap Water?

Q: Is there PFAS in Frankfort tap water?

In EPA's UCMR 5 testing of FRANKFORT PLANT BOARD (2024-08-12 to 2025-05-12): 6:2 FTS 6.4 ng/L (no federal or state limit) and the other 28 PFAS tested not detected. "Not detected" means below the lab's reporting limit, not proven zero.

Q: What are the federal PFAS limits?

EPA's 2024 drinking-water rule set maximum contaminant levels of 4.0 ng/L for PFOA and for PFOS, and 10 ng/L for PFHxS, PFNA and HFPO-DA (GenX). In May 2026 EPA proposed keeping the PFOA and PFOS limits, with the option of until 2031 to comply, and rescinding the other three. Until a final rule, all five limits apply. Results above them today are above the limits in force.

Q: How do I remove PFAS from my tap water?

Reverse-osmosis systems and filters certified to NSF/ANSI 53 or 58 for PFOA/PFOS reduction are the proven options at the tap. Check the certifier's listing (NSF, WQA or IAPMO) for the exact model, and replace cartridges on schedule.

Frankfort, KY: 6:2 FTS 6.4 ng/L detected (no federal or state limit) in 2024 testing. Every PFAS result and filter certifications per compound.

Full Frankfort water report Treatment for PFAS

The measurements · EPA UCMR 5

1 of 29 PFAS detected

Each result is read against its own reference. None of the detected compounds has a federal limit. 6:2 FTS has no federal or state limit and is shown for transparency, not graded.

6:2 FTSNo limit
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid
6.4ng/L
No federal or state limit: shown for transparency, not graded.
Detected, no limit · sampled 2024-08-12 to 2025-05-12Evidence

All 29 compounds in this record

PFOAMCL
Not detected
PFOSMCL
Not detected
PFHxSMCL
Not detected
PFNAMCL
Not detected
HFPO-DA (GenX)MCL
Not detected
6:2 FTS
6.4 ng/L
11Cl-PF3OUdS
Not detected
4:2 FTS
Not detected
8:2 FTS
Not detected
9Cl-PF3ONS
Not detected
ADONA
Not detected
NEtFOSAA
Not detected
NFDHA
Not detected
NMeFOSAA
Not detected
PFBA
Not detected
PFBS
Not detected
PFDA
Not detected
PFDoA
Not detected
PFEESA
Not detected
PFHpA
Not detected
PFHpS
Not detected
PFHxA
Not detected
PFMBA
Not detected
PFMPA
Not detected
PFPeA
Not detected
PFPeS
Not detected
PFTA
Not detected
PFTrDA
Not detected
PFUnA
Not detected

MCL marks the 5 PFAS given a federal limit in EPA's 2024 rule. EPA has proposed rescinding three of those limits; they apply until a final rule.

Results as a table29 results with limit, status, sample date and source

PFAS results for FRANKFORT PLANT BOARD (PWSID KY0370143), Frankfort, KY
Contaminant	Result	Limit	Status	Sampled	Source
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)	6.4 ng/L	No federal or state limit; shown for transparency	Detected, no limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
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	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
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	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
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	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)	< 3 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
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	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)	< 5 ng/L	10 ng/L federal MCL (2024)	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)	< 5 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)	< 6 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)	< 20 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)	< 3 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
Perfluoro-3-methoxypropanoic acid (PFMPA)	< 4 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
Perfluoro-4-methoxybutanoic acid (PFMBA)	< 3 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
Perfluorobutanesulfonic acid (PFBS)	< 3 ng/L	2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
Perfluorobutanoic acid (PFBA)	< 5 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
Perfluorodecanoic acid (PFDA)	< 3 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
Perfluorododecanoic acid (PFDoA)	< 3 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
Perfluoroheptanesulfonic acid (PFHpS)	< 3 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
Perfluoroheptanoic acid (PFHpA)	< 3 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
Perfluorohexanesulfonic acid (PFHxS)	< 3 ng/L	10 ng/L federal MCL (2024)	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
Perfluorohexanoic acid (PFHxA)	< 3 ng/L	400,000 ng/L Michigan EGLE state MCL (strictest US state)	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
Perfluorononanoic acid (PFNA)	< 4 ng/L	10 ng/L federal MCL (2024)	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
Perfluorooctanesulfonic acid (PFOS)	< 4 ng/L	4.0 ng/L federal MCL (2024)	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
Perfluorooctanoic acid (PFOA)	< 4 ng/L	4.0 ng/L federal MCL (2024)	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
Perfluoropentanesulfonic acid (PFPeS)	< 4 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
Perfluoropentanoic acid (PFPeA)	< 3 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
Perfluorotetradecanoic acid (PFTA)	< 8 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
Perfluorotridecanoic acid (PFTrDA)	< 7 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)
Perfluoroundecanoic acid (PFUnA)	< 2 ng/L	No federal or state limit; shown for transparency	Not detected above the reporting limit	2024-08-12 to 2025-05-12	UCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)

How this compares

PFOS across 764 cities with a detected value

4 ng/L federal MCL (2024)

3,396 more were below the lab's 4 ng/L reporting limit and aren't plotted, and 34 have no result on record. 66 cities above 25 ng/L are grouped in the last bar. A position here is not a verdict on the water.

Where Frankfort sitsNot on the stripFrankfort’s PFOS result was below the lab’s reporting limit.

In Kentucky

12of 83 city reports

have a regulated PFAS above the federal limit.

PFAS across Kentucky →

What this record covers

FRANKFORT PLANT BOARD's water system as a whole, as reported to EPA UCMR 5.
29 PFAS compounds, each with its own result.
Samples taken 2024-08-12 to 2025-05-12.

What is unknown

The water at your tap. Building plumbing isn't in this record.
PFAS not listed in the 29 above were not reported in these records.
Levels since the last sample have not been published.

How to test your tap water at home →

Treatment capabilities that apply

Test first, then match a certified method.

A tap test can confirm levels at your home before you choose treatment.

How to test your tap Compare treatment technologies

Identified concerns

6:2 FTS · detected, no federal or state limit

No product in our catalogue has verified certification for these concerns yet.

Questions

Frequently asked

Follow this water

Get Frankfort updates

We'll email you when new PFAS results are published for Frankfort.

Double opt-in: we email a confirmation link. Unsubscribe anytime. No spam.

Is there PFAS in Frankfort tap water?

In EPA's UCMR 5 testing of FRANKFORT PLANT BOARD (2024-08-12 to 2025-05-12): 6:2 FTS 6.4 ng/L (no federal or state limit) and the other 28 PFAS tested not detected. "Not detected" means below the lab's reporting limit, not proven zero.

What are the federal PFAS limits?

EPA's 2024 drinking-water rule set maximum contaminant levels of 4.0 ng/L for PFOA and for PFOS, and 10 ng/L for PFHxS, PFNA and HFPO-DA (GenX). In May 2026 EPA proposed keeping the PFOA and PFOS limits, with the option of until 2031 to comply, and rescinding the other three. Until a final rule, all five limits apply. Results above them today are above the limits in force.

How do I remove PFAS from my tap water?

Reverse-osmosis systems and filters certified to NSF/ANSI 53 or 58 for PFOA/PFOS reduction are the proven options at the tap. Check the certifier's listing (NSF, WQA or IAPMO) for the exact model, and replace cartridges on schedule.

Sources

UCMR5 Analytical ResultsUCMR5 Analytical Results: FRANKFORT PLANT BOARD (KY0370143)US EPA · 2026-01-15View source ↗
State SDWIS Compliance RecordLead & Copper Rule 90th-percentile: FRANKFORT PLANT BOARD (KY0370143)US EPA SDWIS · 2026-07-09View source ↗