What are PFAS?
Per- and polyfluoroalkyl substances (PFAS) are a group of over 12,000 synthetic chemicals that have been manufactured and used in a variety of industries 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, water-resistant clothing, food packaging, firefighting foam (AFFF), and stain-resistant carpets. Once PFAS enter the water supply — typically through industrial discharge or fire-training sites — they are nearly impossible to remove without advanced filtration.
The USGS finding
In 2024, the U.S. Geological Survey published one of the most comprehensive water studies ever conducted. Sampling from 716 locations across all 50 states, researchers detected at least one PFAS compound in 45% of tap water samples. Private well water fared even worse, with contamination rates exceeding 60% in some regions.
The chemicals most commonly found include PFOA, PFOS, and PFHxS — all of which are associated with serious health risks at concentrations well below what is currently considered "safe" by many state standards.
Health risks
The International Agency for Research on Cancer (IARC) classified PFOA as a Group 1 human carcinogen in 2023. Research links PFAS exposure to:
- Kidney and testicular cancer
- Thyroid disease and hormone disruption
- Elevated cholesterol levels
- Immune system suppression (reduced vaccine efficacy in children)
- Pregnancy complications including preeclampsia
- Developmental delays in children
The EPA's updated maximum contaminant level (MCL) for PFOA and PFOS is now 4 parts per trillion — a dramatic reduction from previous guidance of 70 ppt. Many scientists argue even 4 ppt is too permissive.
How to protect yourself
Test your water. Use VitalizeHQ's water quality lookup or order a certified lab test ($30–$150) from your state's environmental agency. Knowing your baseline is the first step.
Filter effectively. Not all filters remove PFAS. Only reverse osmosis (RO) systems and activated carbon block filters certified to NSF/ANSI 58 or 53 standards are effective. Pitcher filters like standard Brita do not remove PFAS.
Reduce dietary exposure. Microwave popcorn bags, grease-resistant fast food wrappers, and non-stick cookware are all significant PFAS sources. Switching to cast iron or stainless steel cookware eliminates one major pathway.
Check your area. The Environmental Working Group's PFAS contamination map and our water quality feature show known contamination sites near you.
What needs to change
The EPA's new PFAS regulations require public water systems serving more than 10,000 people to test and remediate by 2029. But millions of Americans on private wells have no such protection. Until regulatory frameworks catch up, individual testing and filtration remain the most reliable defenses.