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PFAS concern carried
Hopkinsville, KY · PFAS · forever chemicals

Is There PFAS in Hopkinsville Tap Water?

Hopkinsville, KY: PFHxA 5.5 ng/L detected, below the 400,000 ng/L state limit, in 2024 testing. Every PFAS result and filter certifications per compound.

Full Hopkinsville water reportTreatment for PFAS
The measurements · EPA UCMR 5

3 of 29 PFAS detected

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

  • PFHxAState MCL · Michigan
    Perfluorohexanoic acid
    5.5ng/L
    0400,000 ng/L Michigan EGLE state MCL (strictest US state)
    Detected, below its state limit · sampled 2023-10-11 to 2024-06-06Evidence
  • 6:2 FTSNo limit
    1H, 1H, 2H, 2H-perfluorooctane sulfonic acid
    23ng/L

    No federal or state limit: shown for transparency, not graded.

    Detected, no limit · sampled 2023-10-11 to 2024-06-06Evidence
  • PFPeANo limit
    Perfluoropentanoic acid
    4.9ng/L

    No federal or state limit: shown for transparency, not graded.

    Detected, no limit · sampled 2023-10-11 to 2024-06-06Evidence
All 29 compounds in this record
  • PFOAMCL
    Not detected
  • PFOSMCL
    Not detected
  • PFHxSMCL
    Not detected
  • PFNAMCL
    Not detected
  • HFPO-DA (GenX)MCL
    Not detected
  • PFHxA
    5.5 ng/L
  • 6:2 FTS
    23 ng/L
  • PFPeA
    4.9 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
  • PFMBA
    Not detected
  • PFMPA
    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 HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (PWSID KY0240201), Hopkinsville, KY
ContaminantResultLimitStatusSampledSource
Perfluorohexanoic acid (PFHxA)5.5 ng/L400,000 ng/L Michigan EGLE state MCL (strictest US state)Within a historical reference; current applicability unverified2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)23 ng/LNo federal or state limit; shown for transparencyDetected, no limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
Perfluoropentanoic acid (PFPeA)4.9 ng/LNo federal or state limit; shown for transparencyDetected, no limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)< 5 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)< 5 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)< 3 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)< 3 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)< 2 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)< 5 ng/L10 ng/L federal MCL (2024)Not detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)< 5 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)< 6 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)< 20 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)< 3 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
Perfluoro-3-methoxypropanoic acid (PFMPA)< 4 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
Perfluoro-4-methoxybutanoic acid (PFMBA)< 3 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
Perfluorobutanesulfonic acid (PFBS)< 3 ng/L2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limitNot detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
Perfluorobutanoic acid (PFBA)< 5 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
Perfluorodecanoic acid (PFDA)< 3 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
Perfluorododecanoic acid (PFDoA)< 3 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
Perfluoroheptanesulfonic acid (PFHpS)< 3 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
Perfluoroheptanoic acid (PFHpA)< 3 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
Perfluorohexanesulfonic acid (PFHxS)< 3 ng/L10 ng/L federal MCL (2024)Not detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
Perfluorononanoic acid (PFNA)< 4 ng/L10 ng/L federal MCL (2024)Not detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
Perfluorooctanesulfonic acid (PFOS)< 4 ng/L4.0 ng/L federal MCL (2024)Not detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
Perfluorooctanoic acid (PFOA)< 4 ng/L4.0 ng/L federal MCL (2024)Not detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
Perfluoropentanesulfonic acid (PFPeS)< 4 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
Perfluorotetradecanoic acid (PFTA)< 8 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
Perfluorotridecanoic acid (PFTrDA)< 7 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
Perfluoroundecanoic acid (PFUnA)< 2 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-10-11 to 2024-06-06UCMR5 Analytical Results: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)
How this compares

PFOS across 764 cities with a detected value

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 Hopkinsville sitsNot on the stripHopkinsville’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
  • HOPKINSVILLE WATER ENVIRONMENT AUTHORITY's water system as a whole, as reported to EPA UCMR 5.
  • 29 PFAS compounds, each with its own result.
  • Samples taken 2023-10-11 to 2024-06-06.
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 tapCompare treatment technologies
Identified concerns
  • PFHxA · detected below the limit
  • 6:2 FTS · detected, no federal or state limit
  • PFPeA · detected, no federal or state limit
No product in our catalogue has verified certification for these concerns yet.
Questions

Frequently asked

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Is there PFAS in Hopkinsville tap water?

In EPA's UCMR 5 testing of HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (2023-10-11 to 2024-06-06): 6:2 FTS 23 ng/L (no federal or state limit), PFHxA 5.5 ng/L (state limit 400,000), PFPeA 4.9 ng/L (no federal or state limit) and the other 26 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: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)US EPA · 2026-01-15View source ↗
  • State SDWIS Compliance RecordLead & Copper Rule 90th-percentile: HOPKINSVILLE WATER ENVIRONMENT AUTHORITY (KY0240201)US EPA SDWIS · 2026-07-09View source ↗