PFNA (Perfluorononanoic acid)
PFAS ("forever chemical")
Industrial discharge, firefighting foam, consumer product manufacturing.
EPA regulatory status
Legal limit (MCL)
10 ppt
Goal (MCLG)
10 ppt
MCL 10 ppt (ng/L), finalized April 2024. MCLG = 10 ppt. Also regulated within the PFAS Hazard Index. EPA's May 2025 plan PROPOSES to RESCIND the individual PFNA regulation; the proposal is not final, so the 2024 rule remains in force as of this data vintage.
Health effects
Linked to liver, immune, and developmental effects. A persistent 'forever chemical.'
This is general public-health information, not medical advice — consult your physician with any health concerns.
National violations
0
EPA's enforcement data (SDWIS/ECHO) records zero violations of PFNA (Perfluorononanoic acid)'s rule nationally. See this contaminant's regulatory status above for its current standard and compliance timeline — a zero count is not necessarily an all-clear.
How to remove PFNA (Perfluorononanoic acid)
anion exchange
NSF/ANSI 53
Frequently asked questions
What is PFNA (Perfluorononanoic acid)?
PFNA (Perfluorononanoic acid) is a PFAS ("forever chemical") regulated in US drinking water. Industrial discharge, firefighting foam, consumer product manufacturing.
What is the legal limit for PFNA (Perfluorononanoic acid) in drinking water?
MCL 10 ppt (ng/L), finalized April 2024. MCLG = 10 ppt. Also regulated within the PFAS Hazard Index. EPA's May 2025 plan PROPOSES to RESCIND the individual PFNA regulation; the proposal is not final, so the 2024 rule remains in force as of this data vintage.
What health effects does PFNA (Perfluorononanoic acid) have?
Linked to liver, immune, and developmental effects. A persistent 'forever chemical.'
How many violations of PFNA (Perfluorononanoic acid) limits are on record nationally?
EPA's enforcement data (SDWIS/ECHO) records zero violations of PFNA (Perfluorononanoic acid)'s rule nationally. See this contaminant's regulatory status above for its current standard and compliance timeline — a zero count is not necessarily an all-clear.
How do I remove PFNA (Perfluorononanoic acid) from my water?
Filter technologies certified to reduce PFNA (Perfluorononanoic acid) include: reverse osmosis (NSF/ANSI 58), activated carbon (NSF/ANSI 53), anion exchange (NSF/ANSI 53). Look for a filter independently certified against the specific NSF/ANSI standard for this contaminant — general "reduces contaminants" marketing claims are not the same as a contaminant-specific certification.
Source: EPA National Primary Drinking Water Regulations · Data as of 2026-07-16