How can I reduce my exposure to PFAS?

While it is impossible to eliminate PFAS exposure entirely given their ubiquity, research-backed strategies can substantially reduce your daily intake:

Water filtration: PFAS in drinking water is one of the largest controllable exposure routes. Reverse osmosis (RO) systems remove over 90% of PFAS, and high-quality granular activated carbon (GAC) filters remove 60-90% depending on the specific compounds³. Standard pitcher filters (like basic Brita) are much less effective. NSF International certifies filters specifically for PFAS removal -- look for NSF/ANSI 53 or 58 certification. Check EWG's tap water database to see if PFAS have been detected in your water supply¹.

Cookware: Replace nonstick pans coated with PTFE (Teflon and similar brands) with stainless steel, cast iron, carbon steel, or ceramic cookware. While intact PTFE coatings at normal cooking temperatures are considered low-risk, scratched or overheated nonstick coatings can release fluorinated compounds⁴.

Food packaging: PFAS are widely used in grease-resistant food wrappers, microwave popcorn bags, pizza boxes, and fast food containers². Minimize use of these products, transfer takeout food to your own dishes, and avoid microwaving food in its original packaging.

Textiles and consumer products: Decline optional stain-resistant or water-resistant treatments on furniture, carpets, and clothing. Many "waterproof" or "stain-proof" consumer products achieve those properties through PFAS-based coatings⁴. Look for products explicitly labeled "PFAS-free." Avoid clothing marketed with brand-name water-repellent treatments unless they specify PFAS-free chemistry.

Personal care products: Some cosmetics, particularly foundations, waterproof mascaras, and long-wear lip products, contain PFAS. Check ingredient lists for words containing "fluoro" or "perfluoro."

The evidence supporting exposure-reduction strategies varies by pathway, and understanding the relative contribution of each source helps prioritize action:

Drinking water -- the highest-impact intervention: Hu et al. analyzed 2013-2015 national drinking water monitoring data (the US EPA's third Unregulated Contaminant Monitoring Rule) and found that the drinking water supplies of 6 million U.S. residents exceeded the EPA's lifetime health advisory (70 ng/L) for PFOS and PFOA⁵. The EPA's 2024 Maximum Contaminant Levels set enforceable limits of 4 ppt for PFOA and PFOS individually. A two-year study of a full-scale drinking water treatment plant in Uppsala, Sweden found that granular activated carbon (GAC) filters removed 92–100% of PFAS on average when the carbon was "young", but removal fell to 7.0–100% when it was "old" (up to 357 operation days), and that removal also depended on GAC type and flow rate³. The EWG database tracks PFAS detections across U.S. water utilities and is regularly updated¹.

Food contact materials: Schaider et al. tested over 400 fast food packaging samples from 27 restaurant chains and found fluorine (a marker for PFAS) in 46% of food contact paper, 20% of cardboard, and 38% of other packaging². PFAS migrate from packaging into food, particularly with hot, greasy items. Several states have enacted bans on PFAS in food packaging (effective 2023-2025 in California, Washington, and others), but enforcement lags and many products remain on shelves. Cooking at home with uncoated materials is the most reliable way to minimize this pathway.

Indoor environment: Sunderland et al. found that PFAS-treated carpets, upholstery, and clothing contribute to indoor dust concentrations that represent a meaningful exposure pathway, particularly for children who have higher hand-to-mouth contact rates⁴. Dust ingestion may account for a significant fraction of total PFAS intake in young children. Choosing untreated products and regular wet-mopping (not just vacuuming) can reduce this route.

Dietary exposure beyond packaging: PFAS accumulate in the food chain. Freshwater fish from contaminated waterways can contain extremely high PFAS levels -- a 2023 study by Barbo et al. of over 500 composite fish-fillet samples collected across the United States found median total PFAS levels of 9,500 ng/kg in fish from rivers and streams (11,800 ng/kg in the Great Lakes), 278 times higher than in commercially relevant fish tested by the FDA, and estimated that a single serving of freshwater fish per year at the median level translates into a significant increase in blood serum PFOS⁶. Checking state fish consumption advisories is advisable, especially for recreationally caught fish. Produce grown with PFAS-contaminated biosolids (sewage sludge used as fertilizer) is an emerging concern, though regulatory limits are still being developed.

Biomonitoring and half-life considerations: Because long-chain PFAS have half-lives of 2-8 years in the human body, exposure reduction produces gradual rather than immediate decreases in blood levels. However, modeling studies suggest that eliminating the top exposure sources can reduce serum PFAS by 40-60% over a 5-year period. Blood testing for PFAS is available through some clinical labs and can help identify individuals with unusually high exposures who may benefit from more aggressive source identification.