PFAS regulations vary widely across the United States. While the EPA has proposed national drinking water standards, many states already have their own enforceable limits or advisory levels.
States like New Jersey, New York, Michigan, Massachusetts, and California have set strict Maximum Contaminant Levels (MCLs) for PFAS, often below 20 parts per trillion (ppt) for the most common compounds, PFOA and PFOS. Others, such as Wisconsin, Colorado, and Vermont, have implemented monitoring programs and guidance values but are waiting for the EPA’s final federal standards before setting enforceable rules.
To find out if PFAS are regulated in your state, visit your state environmental agency’s website or check the EPA’s PFAS Tracking Map, which lists current testing and regulatory actions nationwide. As federal standards are finalized, state-level rules will be updated to align with or exceed those limits.
Yes, certain filtration technologies can significantly reduce PFAS levels in drinking water, but not all filters are effective. The most reliable methods are:
Granular Activated Carbon (GAC): Adsorbs long-chain PFAS like PFOA and PFOS. Often used in municipal systems and home filtration units.
Ion Exchange (IX): Uses resin beads to attract and trap PFAS molecules; effective for both long- and short-chain compounds.
Reverse Osmosis (RO): Forces water through a semipermeable membrane, removing nearly all PFAS but at a higher cost and with water waste.
Typical pitcher filters or carbon faucet attachments may reduce PFAS slightly but are not certified for full removal. To ensure protection, look for systems certified to NSF/ANSI Standard P473 or equivalent. Regular maintenance and media replacement are essential for sustained performance.
Scientific studies link PFAS exposure to a range of potential health effects. Because these chemicals accumulate in the body over time, even low-level, long-term exposure can be concerning.
Research from the Centers for Disease Control and Prevention (CDC) and the Agency for Toxic Substances and Disease Registry (ATSDR) suggests associations between PFAS exposure and:
Liver and kidney damage
Thyroid hormone disruption
Elevated cholesterol levels
Immune system suppression
Reproductive and developmental issues
Certain cancers, including kidney and testicular cancer
Health effects depend on the type and concentration of PFAS, as well as the duration of exposure. Sensitive populations, such as pregnant women, infants, and individuals with chronic illnesses, may face greater risks. Ongoing research continues to refine our understanding of PFAS toxicity, but the scientific consensus is clear: reducing exposure is critical for long-term health.
PFAS are unusually persistent in the human body. Unlike many chemicals that break down or are excreted quickly, PFAS remain for years. Studies show that the biological half-life of common compounds such as PFOA and PFOS can range from 2 to 9 years, depending on the individual and the level of exposure.
These chemicals bind to blood proteins, circulate through organs, and are slowly eliminated through urine and other bodily fluids. Because the rate of removal is so slow, regular exposure through drinking water or food leads to gradual accumulation.
Reducing exposure, by using filtered water, avoiding PFAS-containing products, and supporting cleanup efforts, can help lower body burden over time. However, once PFAS have accumulated, it can take several years for levels to decline naturally.
Join the nationwide effort to uncover PFAS contamination. Explore our testing guides, review local data, and learn how you can help protect your community’s water supply.