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PFAS are a group of manufactured chemicals that persist in the environment and human body indefinitely. Learn about these "forever chemicals," their health effects, and how to protect your family.
PFAS (per- and polyfluoroalkyl substances) are a class of over 12,000 synthetic chemicals characterized by their strong carbon-fluorine bonds. These bonds make PFAS extremely resistant to heat, water, and oil - which is why they're used in non-stick cookware, water-resistant clothing, food packaging, and firefighting foam.
The same properties that make PFAS useful also make them virtually indestructible in the environment and human body. PFAS do not break down naturally and can accumulate over time, earning them the nickname "forever chemicals."
Critical: PFAS have been detected in the blood of 97% of Americans tested. Even very low levels of exposure are associated with serious health effects.
Also known as C8. Previously used to make Teflon. Linked to kidney cancer, testicular cancer, and thyroid disease.
EPA MCL: 4 parts per trillion (ppt)
Used in Scotchgard and firefighting foam. Associated with liver damage, immune system effects, and developmental issues.
EPA MCL: 4 parts per trillion (ppt)
Replacement for PFOA, but emerging research shows similar health concerns. Found near manufacturing facilities.
EPA MCL: 10 parts per trillion (ppt)
Short-chain and other long-chain PFAS. While sometimes marketed as safer alternatives, research shows potential health risks.
EPA Status: Regulated as a mixture
Pregnant women: PFAS cross the placenta and are found in breast milk, potentially affecting fetal development.
Infants and children: Developing immune systems may be more susceptible to PFAS effects.
Those with chronic conditions: People with existing liver, kidney, or thyroid issues may be at higher risk.
In April 2024, EPA established the first-ever national drinking water standards for PFAS:
Water systems have until 2027 to complete initial monitoring and until 2029 to implement treatment if levels exceed MCLs. Some states have stricter deadlines.
The 4 ppt limit is near the lowest level current technology can reliably detect. Health advocates argue that no level of PFAS is truly safe given their persistence and bioaccumulation.
Aqueous film-forming foam used at military bases, airports, and fire training facilities is the largest source of PFAS contamination. These chemicals leach into groundwater and can travel miles.
Facilities that manufacture or use PFAS in products (textiles, electronics, plastics) can release PFAS into air and water. Communities near these facilities often have elevated levels.
Consumer products containing PFAS end up in landfills. PFAS leach out and contaminate groundwater and nearby surface water.
Conventional treatment plants cannot remove PFAS. When PFAS enter the sewage system, they pass through and are released into waterways or concentrated in biosolids used as fertilizer.
Biosolids (treated sewage sludge) applied to farmland can contain PFAS. Rain carries these chemicals into waterways and groundwater.
PFAS contamination is widespread, but certain areas have elevated levels due to specific sources:
700+ bases with known PFAS contamination from firefighting foam
Airports use AFFF foam for fire training and emergencies
Areas near chemical manufacturing or textile facilities
GenX contamination from Chemours facility
Widespread contamination from multiple sources
Industrial legacy and strict testing revealing contamination
Note: PFAS contamination has been detected in all 50 states. Even if your area isn't listed as high-risk, testing is recommended.
Under EPA's UCMR 5 program, water systems are required to test for PFAS. Check your Consumer Confidence Report or contact your utility for results.
For the most accurate results, use an EPA-certified laboratory. Tests typically screen for 18-40 different PFAS compounds.
Recommended labs: Eurofins, TestAmerica, or state-certified labs listed at EPA.gov
Some companies offer mail-in PFAS testing. While convenient, ensure the kit uses EPA Method 533 or 537.1 and tests at a certified lab.
Testing Tips:
Removes 90-99% of PFAS including both long-chain and short-chain compounds. Point-of-use under-sink systems are most practical for drinking water.
Cost: $200-500 for under-sink system + $50-100/year maintenance
Effective for long-chain PFAS (PFOA, PFOS) but less effective for short-chain PFAS. Look for NSF/ANSI P473 certification specifically for PFAS removal.
Cost: $50-200 for pitcher/faucet mount, $500-2,000 for whole-house
Specialized anion exchange resins can remove both long-chain and short-chain PFAS effectively. Often used in combination with activated carbon.
Cost: $1,000-3,000 for whole-house systems
Does NOT Remove PFAS:
Not all water filters remove PFAS. Look for these specific certifications:
The gold standard for PFAS reduction. Tests for PFOA and PFOS removal to below 70 ppt (stricter testing available for lower limits).
Standard 53 (carbon filtration) and Standard 58 (reverse osmosis) may remove PFAS but verify with P473 for guaranteed performance.
Tip: Check NSF's database at nsf.org/consumer-resources to verify a product's certification status and specific contaminant reduction claims.
While filtering your water is crucial, PFAS exposure comes from many sources. Reduce your total burden:
Install a certified PFAS filter for all drinking and cooking water.
Choose cookware, clothing, and furniture without "stain-resistant" or "water-resistant" treatments.
Use cast iron, stainless steel, or ceramic cookware instead of Teflon-coated pans.
Many microwave popcorn bags and fast-food wrappers contain PFAS. Pop corn on the stove instead.
Some cosmetics and dental floss contain PFAS. Look for PFAS-free alternatives.
First national drinking water standards for PFAS established. Water systems must meet new limits by 2029.
New research into methods to actually destroy PFAS molecules, including supercritical water oxidation and electrochemical treatment.
EPA designated PFOA and PFOS as hazardous substances under CERCLA (Superfund), enabling cleanup funding and manufacturer liability.
3M agreed to pay $10.3 billion to settle water contamination lawsuits from public water suppliers across the U.S.
No. Boiling actually concentrates PFAS by evaporating water while leaving the chemicals behind. You need specialized filtration to remove PFAS.
PFAS have a half-life of 2-8 years in the human body, meaning it takes that long for levels to decrease by half after exposure stops. Complete elimination takes decades.
Not necessarily. Some bottled water has been found to contain PFAS. A certified home filter is generally more reliable and cost-effective.
Standard Brita filters do not remove PFAS effectively. Brita offers some filters with NSF P473 certification specifically for PFAS - verify before purchasing.
Blood testing can confirm exposure but doesn't change treatment (there's no way to remove PFAS from your body). Focus on reducing future exposure instead.
Yes. Many companies now offer PFAS-free alternatives for cookware, clothing, and food packaging. Look for "PFAS-free" labels or contact manufacturers directly.
See your city's water quality report and check for PFAS detections in your area.
This information is provided for educational purposes only and is not intended as medical advice. If you are concerned about PFAS exposure, consult with a healthcare provider. Water quality data is sourced from EPA databases and may not reflect the most current testing results. Always verify with your local water utility for the latest information.