PFAS (Perfluorinated Chemicals) in tap water

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States Affected
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People Affected
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Toxicity Rating
Health Effects

Cancer, effect on infant birth weight, accelerated puberty, liver damage, effects on the immune system, thyroid hormone disruption1

The legal limit is
Health Guideline
0.001 ppb
what is considered unhealthy
Legal Limit
What are PFAS?
PFAS (perfluorinated chemicals or PFCs) are used in hundreds of consumer products because of their non-stick properties. These include Teflon®, food packaging, clothing, carpet, furniture fabric, and firefighting foam.
Are PFAS in my tap water?
The tap water of approximately 110 million Americans in 49 states is known to be contaminated with PFAS. This number likely underestimates the number of Americans actually affected, as PFAS are currently unregulated. This means your water can still be considered legal but contain these chemicals. PFAS are readily found in the environment as a result of industrial run-off and pollution. When any of the 3,000 PFCs are absorbed into the ground, they can make their way into the water supply. There have also been cases of these chemicals being dumped into rivers and waterways by their manufacturers, causing mass contamination.
Are PFAS in my tap water harmful?
Even at extremely low levels, some of these chemicals may result in serious health problems, including cancer, developmental effects to fetuses during pregnancy or to breastfed infants (e.g., low birth weight, accelerated puberty), damage to liver tissue, and effects on the immune system and thyroid.1 Making matters worse, PFAS build up in the body over time. Since these chemicals are mostly man-made, the body isn’t designed to get rid of them, making these PFCs difficult for the average person to clear from their system. In one government study, 98% of subjects had PFOA or other PFAS in their blood samples.2
How much PFAS are safe?
PFAS are not safe for human consumption. They are toxic at incredibly low amounts. However, there is no legal limit for these chemicals. The EWG’s non-enforceable health guideline of 0.001 parts per billion (ppb) provides only marginal protection against the dangers of PFAS. For reference, 1 part per billion is 1 drop in an Olympic-sized swimming pool.
How do I remove PFAS from my tap water?
Clearly Filtered® with Affinity® Filtration Technology gives you the power to remove up to 99.8% of PFAS from your tap water, giving you peace of mind that comes from knowing your drinking water is finally clean and safe. Basic water filters that rely on simple carbon or charcoal are only effective at removing unpleasant odors and taste. These filters are not capable of stopping PFAS and instead allows them to pass right through the filter into the water you're drinking. More sophisticated technology like Clearly Filtered is required to provide this type of contaminant removal.
How does Clearly Filtered do at Removing PFAS (Perfluorinated Chemicals) in tap water?
Clearly Filtered with
Affinity Filtration Technology Product
Water Pitcher Filter
Under-the-Sink FIlter
Water Bottle Filter
Refrigerator Filter
PFAS (Perfluorinated Chemicals) in tap water Removal
Up to >99.5%
Up to >99.8%
Up to >99.8%

1. US EPA. Drinking Water Health Advisories for PFOA and PFOS. Accessed August 24, 2019.

2. Calafat AM, Wong LY, Kuklenyik Z, Reidy JA, Needham LL. Polyfluoroalkyl Chemicals in the U.S. Population: Data from the National Health and Nutrition Examination Survey (NHANES) 2003–2004 and Comparisons with NHANES 1999–2000. Environ Health Perspect. 2007;115(11):1596-1602.

3. US Department of Health and Human Services. Agency for Toxic Substances and Disease Registry. Toxicological Profile for Perfluoroalkyls Draft for Public Comment. June 2018. Accessed August 24, 2019.

4. EWG. PFAS. Accessed August 29, 2022.