PFAS are a group of thousands of synthetic chemicals used in industrial processes, firefighting foam, non-stick cookware, and water-resistant textiles since the 1940s. They are called forever chemicals because the carbon-fluorine bond at their core is among the strongest in organic chemistry. PFOA and PFOS, the two most studied PFAS compounds, have been detected in the blood of 97% of Americans, according to CDC biomonitoring data.

Why PFAS in Drinking Water Is a Priority Health Issue

In April 2024, the EPA finalized the first federal Maximum Contaminant Levels for PFAS in drinking water, setting MCLs for PFOA and PFOS at 4 parts per trillion. Health effects associated with long-term PFAS exposure include increased risk of kidney and testicular cancers, thyroid disease, immune suppression, elevated cholesterol, and adverse developmental outcomes during pregnancy. The Agency for Toxic Substances and Disease Registry has classified PFAS as a serious public health concern.

Which Treatment Technologies Actually Remove PFAS?

Not all water treatment methods remove PFAS. Standard water softeners, UV systems, and sediment filters are largely ineffective. Three technologies have demonstrated consistent PFAS removal in independent testing:

Reverse Osmosis: Most Effective

RO is the gold standard for PFAS removal at the point of use. The semi-permeable RO membrane physically rejects PFAS molecules due to their relatively large molecular size. Studies reviewed by the Water Research Foundation consistently show RO achieving 90-99% removal of PFOA, PFOS, and related compounds. Under-sink RO systems cost $200-$600 installed and protect specifically at the drinking water tap.

Activated Carbon Filtration: Effective With Caveats

Granular activated carbon and carbon block filters adsorb PFAS through the porous carbon surface. Effectiveness varies by carbon type, contact time, PFAS chain length, and filter saturation. Short-chain PFAS are harder to capture on carbon and may pass through at meaningful rates. Carbon filters for PFAS-affected water require more frequent replacement than standard schedules suggest.

NSF International Standard 53 and 58 testing protocols now include PFAS reduction as a certifiable claim. Selecting a certified product with verified PFAS reduction claims is strongly recommended.

Ion Exchange Resins: Highly Effective, Less Common Residentially

Anion exchange resins designed specifically for PFAS capture achieve very high removal rates, often above 99%, and are particularly effective for short-chain PFAS that carbon handles less reliably. These are currently more common in large-scale municipal treatment than in residential devices, but PFAS-selective ion exchange cartridges for home use are commercially available and gaining market adoption.

What Does NOT Remove PFAS

• Standard water softeners
• UV disinfection systems
• Sediment filters
• Boiling water (concentrates PFAS)
• Standard ceramic or mechanical filters

Testing Your Water for PFAS

Tap water PFAS testing is available through state-certified laboratories, typically $150-$400 for a comprehensive panel covering 30 or more compounds. Check your state environmental agency or the EPA PFAS resources to determine whether your community has known contamination. Testing is advisable for private wells near industrial sites, military installations, or airports even without known contamination nearby.

AMPAC USA PFAS Filtration Systems

AMPAC USA manufactures residential and commercial reverse osmosis systems that deliver consistent 90-99% PFAS removal, using NSF-certified membrane components. Systems range from under-sink residential units to commercial-scale installations. Contact AMPAC USA to discuss the right configuration for your needs.

Frequently Asked Questions

Does boiling water remove PFAS?

No. Boiling water does not remove PFAS. It actually concentrates them as water evaporates. Boiling is effective for microbiological contaminants but completely ineffective for dissolved chemical contaminants like PFAS, lead, and nitrates.

How do I know if my tap water has PFAS?

Contact your water utility and request their most recent water quality report. Public water systems are required to test and disclose PFAS under the new EPA rules. For private wells, commission your own test from a state-certified laboratory.

Is RO better than carbon for PFAS removal?

For most households, yes. RO provides higher and more consistent PFAS removal across a wider range of compound types, including short-chain PFAS that carbon handles less reliably. A multi-stage RO system with a carbon pre-filter provides the most comprehensive protection available at the residential scale.

Sources: EPA PFAS | ATSDR PFAS | Water Research Foundation | NSF International

PFAS Removal from Drinking Water: Technology Comparison and Selection

PFAS (per- and polyfluoroalkyl substances) are a family of over 12,000 synthetic compounds characterized by the extremely strong carbon-fluorine bond that makes them resistant to environmental degradation — earning them the name “forever chemicals.” PFAS contamination of drinking water is widespread: the Environmental Working Group estimates that over 200 million Americans consume water with detectable PFAS. The primary sources are AFFF (aqueous film-forming foam) firefighting agents used at military bases and airports, industrial manufacturing (particularly PTFE/Teflon manufacturing), and consumer product manufacturing using PFAS as processing aids or surface treatments.

The EPA’s April 2024 final rule establishing MCLs for six PFAS compounds — PFOA and PFOS at 4 ppt individually, PFNA and PFHxS at 10 ppt, HFPO-DA (GenX) at 10 ppt, and PFBS as part of a hazard index mixture — represents a significant regulatory milestone. These are extremely low concentrations: 4 ppt is 4 micrograms per billion liters. Achieving compliance requires either granular activated carbon (GAC) or anion exchange (AIX) treatment at the utility scale, or point-of-use treatment at individual homes.

Point-of-use reverse osmosis achieves PFAS removal through physical size exclusion and charge repulsion at the membrane surface. A comprehensive NSF P473 certification (the specific standard for PFOA and PFOS reduction in POU systems) verifies RO membrane rejection of both compounds below 70 ppt (in 2024 updated to below the new MCLs). Research studies confirm RO achieves 90-99%+ removal of both long-chain and short-chain PFAS. Activated carbon pre-filtration in RO systems provides additional PFAS adsorption capacity before the membrane. AMPAC USA NSF-certified RO systems with enhanced carbon filtration represent the most reliable point-of-use PFAS removal technology available to consumers and commercial facilities.