PFAS Testing Services


Per–and Polyfluoroalkyl substances (PFAS) are a ubiquitous group of synthetic chemicals that can be found in water, air, food, and in many common products in our homes and workplaces. PFAS chemicals are resistant to heat, water and oil, making them very persistent chemical pollutants. The characteristics making them so appealing to manufacturers (think water resistant outerwear, nonstick kitchenware, stain resistant fabrics) makes them problematic in the environment, as they do not readily break down. 


The CDC has indicated that measurable levels of PFAS can likely be found in the bloodstream of every American. Health effects are still being studied, and PFAS testing of water, soil, and air continues worldwide.


ARA's scientists and partners are committed to staying on top of the latest scientific information, methods, limits and changes, so that you can focus on your projects knowing you have the best PFAS resource in your corner. If you have any questions about PFAS testing or how to test for PFAS, give us a call or send an email today. 


ARA provides drinking water analysis for PFAS via EPA methods 537.1, and 533. We also offer a "modified 533" option for PFAS analysis via LC-MS/MS, using quantitation by isotope dilution. This method employs a solid phase extraction (SPE) followed by liquid chromatography-tandem mass spectrometry (LC-MS/MS) for the determination of select per- and polyfluoroalkyl substances (PFAS) in non-potable water matrices.


ARA provides PFAS testing for the following compounds via EPA Methods 537.1 and 533:


  • HFPO-DA   2,3,3,3-tetrafluoro-2-
    (heptafluoropropoxy) propanoic acid (GenX acid)
  • NEtFOSAA  N-ethyl perfluorooctanesulfonamidoacetic acid
  • NMeFOSAA  N-methyl perfluorooctanesulfonamidoacetic acid
  • PFBS  Perfluorobutanesulfonic acid
  • PFDA  Perfluorodecanoic acid
  • PFDoA  Perfluorododecanoic acid
  • PFHpA   Perfluoroheptanoic acid 
  • PFHxS  Perfluorohexanesulfonic acid 
  • PFHxA  Perfluorohexanoic acid 
  • PFNA  Perfluorononanoic acid 
  • PFOS  Perfluorooctanesulfonic acid 
  • PFOA  Perfluorooctanoic acid 
  • PFTA  Perfluorotetradecanoic acid 
  • PFTrDA  Perfluorotridecanoic acid 
  • PFUnA  Perfluoroundecanoic acid 
  • 11Cl-PF3OUdS 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid  
  • 9Cl-PF3ONS  9-chlorohexadecafluoro-3-oxanone-1-sulfonic acid  
  • ADONA  4,8-dioxa-3H-perfluorononanoic acid


ARA is also able to test for the following 29 compounds via our proprietary LC-MS/MS (isotope dilution) method for groundwater or other water samples (not for drinking water compliance): 

  • 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid 11CLPF3OUDS 
  • 4:2 fluorotelomer sulfonic acid 42FTS 
  • 6:2 fluorotelomer sulfonic acid 62FTS 
  • 8:2 fluorotelomer sulfonic acid 82FTS 
  • 9-chlorohexadecafluoro-3-oxanone-1-sulfonic acid 9CLPF3ONS
  • 4,8-dioxa-3h-perfluorononanoic acid (ADONA acid) DONA
  • perfluorooctane sulfonamide (PFOSA) FOSA
  • 2,3,3,3-tetrafluoro-2-(heptafluoropropoxy)propanoic acid (GenX acid) HFPODA 
  • n-ethyl perfluorooctanesulfonamido acetic acid NETFOSAA
  • n-methyl perfluorooctane sulfonamide NMEFOSA  
  • n-methylperfluorooctane sulfonamido acetic acid NMEFOSAA  
  • perfluorobutanoic acid PFBA
  • perfluorobutane sulfonic acid PFBS  
  • perfluorodecanoic acid PFDA
  • perfluorododecanoic acid PFDOA  
  • perfluorodecane sulfonic acid PFDS  
  • perfluoroheptanoic acid PFHPA  
  • perfluoroheptane sulfonic acid PFHPS  
  • perfluorohexanoic acid PFHXA  
  • perfluorohexane sulfonic acid PFHXS  
  • perfluorononanoic acid PFNA  
  • perfluorononanesulfonic acid PFNS  
  • perfluorooctanoic acid PFOA  
  • perfluorooctane sulfonic acid PFOS  
  • perfluoropentanoic acid PFPA  
  • perfluoropentane sulfonic acid PFPES  
  • perfluorotetradecanoic acid PFTEA  
  • perfluorotridecanoic acid PFTRIA  
  • perfluoroundecanoic acid PFUNA


Click Here to View PFAS compound list with Chemical

Abstracts Service Registry Number (CASRN)


Sampling Notes:


  • Sample integrity is of the utmost importance when collecting PFAS samples.


  • Please help avoid trace or cross contamination of PFAS by adhering to the guidelines set forth by your state environmental services department, and the instructions provided by your lab.


  • Never use "Blue Ice" / gel refrigerants / cold packs to chill PFAS samples. Always chill PFAS samples with real ice.


Residential customers please note: 
ARA is a New Hampshire-based lab, and we are not certified to accept drinking water samples outside of New England. 
ARA is certified in MA, ME, NH, RI, & VT


If you want to know how to test for PFAS in water or would like a PFAS Testing Kit, contact ARA with questions. 


Not everyone needs to test for PFAS. Follow your state or town water testing guidelines. If you are near a contaminated site, or have a specific concern, you can and should request additional testing.


As always, ARA encourages everyone with a private well to test their drinking water regularly, regardless of what’s going on in the news.  If you have concerns about PFAS or would like to know how to test your water for PFAS (PFOA, PFOS, C8, etc.), contact ARA with questions. 





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