Perfluorohexanoic acid
Perfluorohexanoic acid (PFHxA) is part of a class of synthetic compounds known as per- and polyfluoroalkyl substances (PFAS) widely used to make products more resistant to stains, water, and grease. PFHxA is not currently commercially produced, but results from the breakdown of other PFAS and as a potential impurity in chemical processing. Like many other PFAS, it is highly persistent in the environment and the body. Adverse health effects associated with elevated PFHxA levels include liver and developmental toxicity.
Health Guideline Level (HGL)
0.2 ppb
Maximum level that poses minimal health risk based on the latest science
Health Effects
As with many PFAS compounds, research into the health effects of PFHxA is rapidly evolving. Animal studies show associations between PFHxA and liver toxicity, as well as developmental effects (low birth weight and offspring mortality).
Affected Organs & Systems:
Common Sources
- Not naturally occurring, so its widespread detection in drinking water can be attributed to human release
- Includes industrial waste, wastewater discharge, and stormwater runoff
- Elevated levels are often found near industrial sites with historic PFAS use, where PFHxA may occur as an impurity or breakdown product
How to Remove It
Water filters certified under the following NSF standards are effective at removing Perfluorohexanoic acid:
Health Guideline Level
The HGL represents the maximum level that poses minimal health risk based on the latest scientific research. It's often more protective than federal legal limits.
Contaminant Type
Perfluorohexanoic acid is classified as a PFAS contaminant.
This contaminant primarily affects the developmental, liver.
Check Your Water
Find out if Perfluorohexanoic acid is in your tap water.
Search Your City