PurityMap
Search city, ZIP, contaminant⌘KFind my water
PFAS concern carried
Mountain Top, PA · PFAS · forever chemicals

Is There PFAS in Mountain Top Tap Water?

Mountain Top, PA: PFBA 12.6 ng/L detected (no federal or state limit) in 2024 testing. Every PFAS result and filter certifications per compound.

Full Mountain Top water reportTreatment 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. PFBA has no federal or state limit and is shown for transparency, not graded.

  • PFBANo limit
    Perfluorobutanoic acid
    12.6ng/L

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

    Detected, no limit · sampled 2023-01-17 to 2023-10-11Evidence
All 29 compounds in this record
  • PFOAMCL
    Not detected
  • PFOSMCL
    Not detected
  • PFHxSMCL
    Not detected
  • PFNAMCL
    Not detected
  • HFPO-DA (GenX)MCL
    Not detected
  • PFBA
    12.6 ng/L
  • 11Cl-PF3OUdS
    Not detected
  • 4:2 FTS
    Not detected
  • 6:2 FTS
    Not detected
  • 8:2 FTS
    Not detected
  • 9Cl-PF3ONS
    Not detected
  • ADONA
    Not detected
  • NEtFOSAA
    Not detected
  • NFDHA
    Not detected
  • NMeFOSAA
    Not detected
  • 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 PAW CRYSTAL LAKE (PWSID PA2409003), Mountain Top, PA
ContaminantResultLimitStatusSampledSource
Perfluorobutanoic acid (PFBA)12.6 ng/LNo federal or state limit; shown for transparencyDetected, no limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)< 5 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)< 5 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)< 3 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)< 5 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)< 3 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)< 2 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)< 5 ng/L10 ng/L federal MCL (2024)Not detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)< 5 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-01-17 to 2024-01-10UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)< 6 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-01-17 to 2024-01-10UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)< 20 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)< 3 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
Perfluoro-3-methoxypropanoic acid (PFMPA)< 4 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
Perfluoro-4-methoxybutanoic acid (PFMBA)< 3 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
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 limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
Perfluorodecanoic acid (PFDA)< 3 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
Perfluorododecanoic acid (PFDoA)< 3 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
Perfluoroheptanesulfonic acid (PFHpS)< 3 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
Perfluoroheptanoic acid (PFHpA)< 3 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
Perfluorohexanesulfonic acid (PFHxS)< 3 ng/L10 ng/L federal MCL (2024)Not detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
Perfluorohexanoic acid (PFHxA)< 3 ng/L400,000 ng/L Michigan EGLE state MCL (strictest US state)Not detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
Perfluorononanoic acid (PFNA)< 4 ng/L10 ng/L federal MCL (2024)Not detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
Perfluorooctanesulfonic acid (PFOS)< 4 ng/L4.0 ng/L federal MCL (2024)Not detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
Perfluorooctanoic acid (PFOA)< 4 ng/L4.0 ng/L federal MCL (2024)Not detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
Perfluoropentanesulfonic acid (PFPeS)< 4 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
Perfluoropentanoic acid (PFPeA)< 3 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
Perfluorotetradecanoic acid (PFTA)< 8 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-01-17 to 2024-01-10UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
Perfluorotridecanoic acid (PFTrDA)< 7 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-01-17 to 2024-01-10UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
Perfluoroundecanoic acid (PFUnA)< 2 ng/LNo federal or state limit; shown for transparencyNot detected above the reporting limit2023-01-17 to 2023-10-11UCMR5 Analytical Results: PAW CRYSTAL LAKE (PA2409003)
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 Mountain Top sitsNot on the stripMountain Top’s PFOS result was below the lab’s reporting limit.
In Pennsylvania
41of 122 city reports

have a regulated PFAS above the federal limit.

PFAS across Pennsylvania →
What this record covers
  • PAW CRYSTAL LAKE's water system as a whole, as reported to EPA UCMR 5.
  • 29 PFAS compounds, each with its own result.
  • Samples taken 2023-01-17 to 2024-01-10.
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
  • PFBA · 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 Mountain Top updates

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

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

Is there PFAS in Mountain Top tap water?

In EPA's UCMR 5 testing of PAW CRYSTAL LAKE (2023-01-17 to 2023-10-11): PFBA 12.6 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: PAW CRYSTAL LAKE (PA2409003)US EPA · 2026-01-15View source ↗
  • State SDWIS Compliance RecordLead & Copper Rule 90th-percentile: PAW CRYSTAL LAKE (PA2409003)US EPA SDWIS · 2026-07-09View source ↗