29 PFAS Compounds Tested by EPA UCMR5

Comprehensive profiles for all 29 PFAS compounds tested under EPA's UCMR5 program (2023-2025). 7 of these compounds have enforceable federal limits as of the 2024 EPA rule. Browse by chemical family below or check your specific water for any compound at the homepage.

Quick Answer

This index links to 29 pages organized into 5 categories for easy browsing.

Perfluorocarboxylic Acids (PFCAs) (10)

  • PFOA EPA limit: 4 ppt – Perfluorooctanoic Acid
  • PFNA EPA limit: 10 ppt – Perfluorononanoic Acid
  • PFHpA EPA limit: 10 ppt – Perfluoroheptanoic Acid
  • PFDA Perfluorodecanoic Acid
  • PFUnA Perfluoroundecanoic Acid
  • PFDO Perfluorododecanoic Acid
  • PFTeDA Perfluorotetradecanoic Acid
  • PFHxA Perfluorohexanoic Acid
  • PFBA Perfluorobutanoic Acid
  • PFPeA Perfluoropentanoic Acid

Perfluorosulfonic Acids (PFSAs) (6)

  • PFOS EPA limit: 4 ppt – Perfluorooctane Sulfonic Acid
  • PFHxS EPA limit: 10 ppt – Perfluorohexane Sulfonic Acid
  • PFBS EPA limit: 2000 ppt – Perfluorobutane Sulfonic Acid
  • PFHpS Perfluoroheptane Sulfonic Acid
  • PFNS Perfluorononane Sulfonic Acid
  • PFDS Perfluorodecane Sulfonic Acid

Perfluorosulfonamides (3)

  • PFOSA Perfluorooctane Sulfonamide
  • NEtFOSAA N-Ethyl Perfluorooctane Sulfonamido Acetic Acid
  • NMeFOSAA N-Methyl Perfluorooctane Sulfonamido Acetic Acid

Fluorotelomer Sulfonates (FTS) (4)

Fluorinated Ether Compounds (6)

  • HFPO-DA EPA limit: 10 ppt – Hexafluoropropylene Oxide Dimer Acid (GenX)
  • ADONA Ammonium 4,8-Dioxa-3H-Perfluorononanoate
  • 9Cl-PF3ONS 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic Acid
  • 11Cl-PF3OUdS 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic Acid
  • NaDONA Sodium Dodecafluoro-3H-4,8-dioxanonanoate
  • PBTF Perfluoro(2-methyl-3-oxahexanoic) Acid (PBTF)