What is PFAS and Why It Matters in 2026
PFAS are synthetic chemicals found in drinking water across the US. Here's what the science says - and which filters actually remove them.
- EPA set new PFAS limits in 2024 - 4 parts per trillion for PFOA and PFOS
- 45% of US tap water contains detectable PFAS (USGS, 2023)
- Only NSF 53 and NSF 58 certified filters reliably remove PFAS
What are PFAS?
PFAS (per- and polyfluoroalkyl substances) are a group of over 12,000 synthetic chemicals used in manufacturing since the 1940s. They are called "forever chemicals" because they do not break down in the environment or in the human body.
Common sources include non-stick cookware, food packaging, firefighting foam, and industrial discharge - all of which can leach into groundwater and municipal water supplies.
Health risks
Long-term exposure to PFAS has been linked to increased risk of certain cancers, thyroid disease, immune system disruption, and developmental issues in children. The EPA classifies PFOA and PFOS as likely carcinogens.
Which filters remove PFAS?
Not all filters remove PFAS. Standard pitcher filters (including most Brita models) do not remove PFAS. Only filters certified to NSF 53 or NSF 58 are verified to remove PFAS compounds.
| Filter type | Removes PFAS | NSF standard |
|---|---|---|
| Reverse osmosis | Yes | NSF 58 |
| Under-sink (activated carbon) | Yes | NSF 53 |
| Whole house (catalytic carbon) | Yes | NSF 53 |
| Standard pitcher (Brita, etc.) | No | Not listed for PFAS |
| Boiling water | No | - |
Our top pick for PFAS removal
We pick it because PFOA and PFOS are named in its certification, which WQA holds, not just in the maker's marketing. It fits under the kitchen sink, wastes no water and needs no electricity. It is a carbon filter, so it does not reduce fluoride; for that you need a reverse osmosis system listed for it.
How to check your tap water
You can check PFAS levels in your area using the EPA's PFAS drinking water monitoring data or the EWG Tap Water Database. Enter your zip code to see local utility reports.
If your utility has detected PFAS above 4 ppt, an NSF 53 or NSF 58 certified filter is the most reliable solution available for home use.
Buying direct from the brand
Some of the makers on this page also sell the same systems on their own sites and run their own affiliate programs. We earn a commission from those links too, at no extra cost to you. Prices, bundles and warranty terms can differ from Amazon, so compare both before you buy.