PFAS Testing Services



ARA is certified to test environmental samples for Per–and Polyfluoroalkyl Substances (PFAS) in MA, ME, NH, RI, & VT.


Our typical PFAS analysis turnaround time, TAT is 10 business days.

*Contact the lab for current TAT information

*Rush TAT may be available for an additional fee


We perform your PFAS analysis on site at our lab in Portsmouth, NH (no subcontracting fees).


What are Per–and Polyfluoroalkyl substances (PFAS)?

Click to read PFAS FAQs.

PFAS firefighting foam image via ARA


ARA provides Laboratory Analytical Services to identify and quantify PFAS in environmental samples for municipalities, state agencies, industrial clients and homeowners throughout New England. 


ARA is certified for PFAS analysis in drinking water by EPA methods 537.1 and 533. We also offer PFAS via our proprietary LC-MS/MS (isotope dilution) method for groundwater or other water samples (not for drinking water compliance). Method 1633 coming soon.


Our proprietary method option for PFAS analysis via LC-MS/MS, uses quantitation by isotope dilution employing 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'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 PFAS testing for the following compound lists   



EPA Method 537.1 (18 compounds):


  • 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 
  • PFTeA (PFTeDA, PFTA)  Perfluorotetradecanoic acid 
  • PFTRIA  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


EPA Method 533 (25 compounds):


  • 11Cl-PF3OUdS 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid  
  • 9Cl-PF3ONS  9-chlorohexadecafluoro-3-oxanone-1-sulfonic acid
  • HFPODA   2,3,3,3-tetrafluoro-2-(heptafluoropropoxy) propanoic acid (GenX acid)
  • PFBS  Perfluorobutanesulfonic acid
  • PFDA  Perfluorodecanoic acid
  • PFDoA  Perfluorododecanoic acid
  • ADONA  4,8-dioxa-3H-perfluorononanoic acid
  • 42FTS  4:2 fluorotelomer sulfonic acid 
  • PFHpA   Perfluoroheptanoic acid 
  • PFHxS  Perfluorohexanesulfonic acid 
  • PFHxA  Perfluorohexanoic acid 
  • PFNA  Perfluorononanoic acid 
  • PFOS  Perfluorooctanesulfonic acid 
  • PFOA  Perfluorooctanoic acid 
  • 62FTS 6:2 fluorotelomer sulfonic acid   
  • 82FTS  8:2 fluorotelomer sulfonic acid
  • PFUnA  Perfluoroundecanoic acid 
  • NFDHA  Nonafluoro-3,6-dioxaheptanoic acid
  • PFBA  perfluorobutanoic acid
  • PFEESA  perfluoro(2-ethoxyethane)sulfonic acid
  • PFHPS  perfluoroheptane sulfonic acid
  • PFMPA  perfluoro-3-methoxypropanoic acid
  • PFMBA  Perfluoro-4-methoxybutanoic acid
  • PFPA  perfluoropentanoic acid
  • PFPES  perfluoropentane sulfonic acid


LC-MS/MS (isotope dilution) Method (29 compounds) 

this method is used for groundwater and other water samples

(not for drinking water compliance): 

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


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.


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


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.


The EPA 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 contact ARA with questions. 

Helpful PFAS Resources:




CDC Agency for Toxic Substances and Disease (ATSDR):




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