PFBS (Perfluorobutane Sulfonic Acid)
Category: pfas
EPA MCL
Not regulated
Status
EPA Regulated
NSF Standard
NSF/ANSI 58
Health Effects
Short-chain PFAS with lower bioaccumulation than PFOA/PFOS but still persistent. Associated with thyroid effects, reproductive toxicity, and kidney effects in animal studies. Regulated under EPA's 2024 PFAS Hazard Index rule as part of a mixture assessment.
Where It Comes From
Short-chain PFAS used as a replacement for longer-chain compounds like PFOS. Used in industrial processes, firefighting foams, and consumer products. More mobile in groundwater than longer-chain PFAS.
Where It's Commonly Found
Found alongside other PFAS compounds near industrial facilities, military bases, and airports. More mobile in groundwater than PFOA/PFOS, so may travel farther from source.
No individual MCL - regulated under the PFAS Hazard Index (HI) of 1 along with PFHxS, PFNA, and HFPO-DA. Detected in hundreds of water systems under UCMR 5.
How to Remove It
Effective Technologies
- reverse osmosis
- ion exchange
- nanofiltration
Does NOT Remove It
- activated carbon
- carbon block
- UV
- water softener
- mechanical filtration
Filters That Address PFBS (Perfluorobutane Sulfonic Acid)
5 filters in our database list PFBS (Perfluorobutane Sulfonic Acid) reduction.
Epic Water Filters Nano
pitcher
$82
$138/yr filters
Price checked Apr 2026
Berkey Big Berkey
gravity
$367
$10/yr filters
Price checked Apr 2026
ProOne Big+
gravity
$183.96
$126.32/yr filters
Price checked Apr 2026
AquaTru Classic
countertop
$449
$114/yr filters
Price checked Apr 2026
AquaTru Carafe
countertop
$349
$104/yr filters
Price checked Apr 2026
Official Sources
Related Contaminants
Learn More
Check if PFBS (Perfluorobutane Sulfonic Acid) is in your water
Enter your ZIP code to see local water quality data and get matched with the right filter.
Enter Your ZIP Code →Informational guidance based on EPA data and NSF standards - not medical advice.