PFAS Water Filter: How to Remove Forever Chemicals from Your Water
PFAS Filtration
PFAS Water Filter: How to Remove Forever Chemicals from Your Water
Three filter technologies can remove PFAS from your water, but they work in fundamentally different ways and at very different levels of effectiveness. After 30+ years of helping homeowners solve water quality problems, here is what actually works, what does not, and which system fits your situation.
For a full overview of carbon filtration and how it works, see our Carbon Filters for Water: The Complete Guide.
The Short Answer
PFAS ("forever chemicals") are synthetic compounds the EPA now regulates at 4 parts per trillion. Three proven technologies remove them from residential water:
- Ion exchange (dedicated PFAS system): The most effective whole-house option. Removes PFOA, PFOS, and other PFAS to non-detect levels (<1 ppt). Our PFAS Removal System uses WQA Gold Seal certified ResinTech resin purpose-built for PFAS. $1,695.
- Activated carbon (whole-house): Effective for long-chain PFAS (PFOA, PFOS) with large-bed systems that provide adequate contact time. Also removes chlorine, VOCs, and taste/odor issues. A whole-house carbon filter is a strong multi-purpose option. $1,495 to $1,695.
- Reverse osmosis (under-sink): Removes 90% to 99%+ of all PFAS types, including short-chain compounds. Best installed at the kitchen sink for drinking and cooking water. Pure-75 RO System, $595.
The right choice depends on your PFAS levels, water source, and protection goals. Call Aidan at 800-460-5810 with your water test results for a free, no-pressure recommendation.
Which PFAS Filter Is Right for You?
Answer 3 quick questions for a personalized recommendation.
Our PFAS Filter Recommendations
After testing and installing water treatment systems for over 30 years, we offer three approaches to PFAS removal. Each uses a different technology, and the right one depends on your confirmed PFAS levels and what you need the system to do. You can compare every certified option side by side in our PFAS water filters collection.
PFAS Removal System (Ion Exchange)
$1,695
Non-detect PFAS removal Whole house WQA Gold SealThis is our dedicated PFAS removal system, built specifically for homes with confirmed PFAS contamination. It uses ResinTech SIR-110-HP ion exchange resin, a media engineered specifically for PFAS compounds. Unlike carbon (which adsorbs PFAS gradually and with variable results), ion exchange resin has a high chemical affinity for PFAS molecules and removes PFOA, PFOS, PFNA, PFHxS, GenX, and other PFAS compounds to non-detect levels (<1 ppt).
The system is a 12x48 Vortech tank with 2 cubic feet of resin, a Clack in-out head with bypass, and no electricity or drain line required. It installs inline on your main water line and treats every tap in the home at up to 8 GPM.
See the PFAS Removal SystemWhole-House Carbon Filter
$1,495 to $1,695
PFOA/PFOS reduction Whole house Multi-contaminantA whole-house carbon filter is the right choice if you want broad water quality improvement alongside PFAS reduction. Activated carbon is effective for long-chain PFAS (PFOA and PFOS, the two compounds with EPA enforceable limits), though less reliable for short-chain compounds like GenX and PFBS.
The real advantage of carbon is versatility: it simultaneously removes chlorine, chloramines, VOCs, pesticides, herbicides, and taste/odor issues from every tap in your home. If your PFAS concern is moderate and you also want general water quality improvement, carbon is the practical multi-purpose option. (For a deep dive on carbon filtration, see What Is Activated Carbon?)
We offer several whole-house carbon models. The most popular for PFAS reduction:
| Model | Size | Type | Price |
|---|---|---|---|
| Clack 1.5 CF Non-Backwashing | 1.5 cubic feet | Upflow (non-BW) | $1,495 |
| Clack 2.5 CF Non-Backwashing | 2.5 cubic feet | Upflow (non-BW) | $1,695 |
We also offer backwashing carbon filter models for homes with higher flow demands. Not sure which is right? See Backwashing vs Non-Backwashing Carbon Filter for a full comparison.
Browse Carbon FiltersUnder-Sink Reverse Osmosis (Drinking Water)
$595
90-99%+ all PFAS types Point-of-useA reverse osmosis system is the most effective point-of-use PFAS filter available. RO membranes reject 90% to 99%+ of all PFAS types, including short-chain compounds that carbon may miss. The tradeoff: RO only treats the single tap where it is installed (typically the kitchen sink), so it protects your drinking and cooking water but not your showers or other faucets.
Our Pure-75 RO system produces 75 gallons per day, includes a storage tank and dedicated faucet, and installs under your kitchen sink in about an hour. It also removes fluoride, lead, nitrates, arsenic, and virtually all dissolved contaminants. For a full comparison of these two approaches, see Carbon Filter vs Reverse Osmosis.
For tighter budgets, ask Aidan about our NRO4-50 system (50 gallons per day, 4-stage filtration) at a lower price point. Call 800-460-5810 to discuss options.
See the Pure-75 RO SystemThe Best Combination for Maximum Protection
For the most comprehensive residential PFAS protection, combine a whole-house system with point-of-use RO:
- Dedicated PFAS system (ion exchange), $1,695: First line of defense at the point of entry. Removes PFAS to non-detect at every tap. See the system.
- Under-sink reverse osmosis, $595: Final barrier for drinking and cooking water. Removes anything the first stage might miss. See the Pure-75.
Total investment: $2,290 for non-detect PFAS levels at every tap plus a final polishing step for your drinking water. Both systems are DIY-installable with free phone support from Aidan.
If you do not have confirmed PFAS but want general protection, a whole-house carbon filter ($1,495 to $1,695) plus RO ($595) is an excellent alternative that covers PFAS and many other contaminants.
Product Comparison: Ion Exchange vs Carbon vs RO
All three technologies remove PFAS, but they differ in removal effectiveness, scope, what else they treat, and long-term cost. Here is the head-to-head comparison.
| Feature | PFAS System (Ion Exchange) | Carbon Filter (GAC) | Reverse Osmosis |
|---|---|---|---|
| PFAS Removal | Non-detect (<1 ppt) | ~73% avg (long-chain). Variable for short-chain. | 90-99%+ all types |
| Scope | Whole house | Whole house | Single tap (point-of-use) |
| Other Contaminants | Nitrates, sulfates (limited) | Chlorine, VOCs, taste, odor, pesticides | Fluoride, lead, nitrates, arsenic, TDS |
| Price | $1,695 | $1,495 to $1,695 | $595 (Pure-75) |
| Media / Filter Life | 3-7 years (resin replacement) | 3-5 years (carbon replacement) | 6-12 months (filter change) |
| Backwash / Drain | None required | Yes (backwashing) or None (upflow) | Produces wastewater (3:1 to 4:1 ratio) |
| Electricity | None | Yes (backwashing) or None (upflow) | None |
| Certification | WQA Gold Seal, NSF | NSF/ANSI 42, 53 | NSF/ANSI 58 |
| Best For | Confirmed PFAS contamination | General protection + multi-contaminant | Drinking water, budget entry point |
Which Filters Actually Remove PFAS (and Which Do Not)
Not every water filter removes PFAS. These chemicals are invisible, odorless, and present at parts-per-trillion concentrations. Standard sediment filters, water softeners, and basic pitcher filters were not designed for this. Here is what works and what does not.
| Filter Technology | PFAS Removal | Best For | Key Limitation |
|---|---|---|---|
| Ion Exchange (PFAS-specific resin) | Non-detect (<1 ppt) across all PFAS | Whole-house, confirmed contamination | Does not remove chlorine, VOCs, or taste/odor |
| Reverse Osmosis (RO) | 90-99%+ of all PFAS types | Drinking/cooking water (point-of-use) | Single tap only. Produces wastewater. |
| Granular Activated Carbon (GAC), whole-house | Effective for PFOA/PFOS. Less for short-chain. | Whole-house, multi-contaminant protection | Contact time dependent. Short-chain PFAS may break through. |
| Carbon Block (pitcher/countertop) | Moderate for PFOA/PFOS if NSF 53 certified | Budget drinking water option | Limited capacity. Filters saturate quickly. |
| Water Softener | Not effective | N/A | Softener resins target calcium/magnesium, not PFAS. |
| Sediment Filter | Not effective | N/A | PFAS are dissolved chemicals, not particles. |
| UV Disinfection | Not effective | N/A | UV targets bacteria/viruses, not dissolved chemicals. |
| Boiling | Not effective (concentrates PFAS) | N/A | Water evaporates; PFAS remain and become more concentrated. |
Sources: EPA Drinking Water Filter Study, Duke University PFAS Filter Study
Ion Exchange vs Carbon for PFAS: The Key Difference
This is the most important distinction for anyone shopping for a PFAS filter. Both ion exchange and activated carbon can be installed as whole-house systems. Both are tank-based, require no electricity (for upflow/non-backwashing models), and treat every faucet in the home. But they remove PFAS through fundamentally different mechanisms, and that difference matters.
How Carbon Removes PFAS
Activated carbon uses adsorption: PFAS molecules are attracted to the carbon surface and stick to it as water passes through the filter bed. The EPA recognizes GAC as a Best Available Technology for PFAS treatment (EPA, 2024). The critical variable is empty bed contact time (EBCT), which means larger carbon beds remove more PFAS. This is why our whole-house systems (1.5 to 2.5 cubic feet) significantly outperform small cartridge filters. (For a complete explanation of how adsorption works, see What Is Activated Carbon?)
Carbon is highly effective for long-chain PFAS (PFOA and PFOS), which are the two compounds with enforceable EPA limits. However, shorter-chain PFAS like PFBS and GenX break through carbon beds faster because they adsorb less strongly (Environmental Science: Water Research & Technology, 2019). If your water contains a mix of PFAS types, carbon alone may not achieve non-detect levels.
How Ion Exchange Removes PFAS
PFAS-selective ion exchange resin (like the ResinTech SIR-110-HP in our dedicated system) works through selective chemical exchange: the resin has a specifically engineered affinity for PFAS anions. When water passes through, PFAS molecules displace less-preferred ions on the resin surface. The result is faster kinetics, longer throughput before exhaustion, and consistent removal to non-detect levels across both long-chain and short-chain PFAS.
The trade-off is that ion exchange resin does not remove chlorine, VOCs, or taste/odor. It is a specialist, not a generalist. If you need PFAS removal and general water quality improvement, the approach is either: (1) pair the PFAS system with a separate carbon filter, or (2) use carbon alone if your PFAS concern is moderate and you value the multi-contaminant coverage.
When to Choose Each
- Choose ion exchange if you have confirmed PFAS above the EPA MCL (4 ppt) and need non-detect removal. Especially important if short-chain PFAS are present. This is the targeted, high-performance option.
- Choose carbon if your PFAS concern is precautionary (not confirmed above MCL) and you also want chlorine, VOC, and taste/odor removal from every tap. Carbon is the practical all-in-one option. Concerned about chlorine specifically? See Is Chlorine in Water Bad for You?
- Choose both if you have high PFAS levels and also want general water quality improvement. Install the carbon filter first (upstream), then the PFAS system downstream.
Treatment Recommendations by Situation
The right PFAS treatment depends on your water source, confirmed contamination level, budget, and how much protection you want. Here are practical recommendations for the most common scenarios.
Scenario 1: Confirmed PFAS Above 4 ppt
You have tested and your PFOA or PFOS levels exceed the EPA's Maximum Contaminant Level.
- Best approach: Dedicated PFAS removal system ($1,695) for whole-house non-detect removal, plus under-sink RO ($595) as a final barrier for drinking water.
- Whole-house alternative: If you prefer multi-contaminant coverage, a 2.5 cubic foot carbon filter provides meaningful PFOA/PFOS reduction (though not to non-detect) plus chlorine, VOC, and taste/odor removal.
Scenario 2: Municipal Water with Reported PFAS
Your utility has disclosed PFAS detections, or you live in an area with known contamination sources.
- Minimum recommendation: Under-sink reverse osmosis ($595) for immediate drinking water protection. RO removes 90%+ of all PFAS types.
- Better: Add a dedicated PFAS system ($1,695) or a whole-house carbon filter (starting at $1,495) for every-tap coverage.
Scenario 3: Well Water Near a Known Source
Your well is within 5 miles of a military base, airport, industrial facility, or landfill.
- First step: Get your water tested for PFAS by a certified lab. PFAS testing requires EPA Method 533 or 537.1 and typically costs $200 to $400.
- While waiting for results: An under-sink RO system ($595) provides immediate drinking water protection.
- After results: If PFAS are confirmed above 4 ppt, install the dedicated PFAS system. If levels are very high, call Aidan at 800-460-5810 to discuss whether a lead/lag configuration makes sense.
Scenario 4: Precautionary Protection (No Confirmed PFAS)
You want protection even though you have not tested, or your levels are below detection.
- Practical approach: A whole-house carbon filter provides broad-spectrum protection against PFAS, chlorine, VOCs, and taste/odor issues. Even without confirmed PFAS, it is good insurance.
- Add-on for drinking water: Pair with a Pure-75 RO ($595) at the kitchen sink for the best possible drinking water quality.
Scenario 5: Budget-Conscious Protection
If whole-house treatment is not in the budget right now, start with what protects you most.
- Best value: Pure-75 Reverse Osmosis ($595) for your drinking and cooking water. Removes 90%+ of all PFAS types.
- Even tighter budget: Ask Aidan about the NRO4-50 Reverse Osmosis at a lower price point. Call 800-460-5810.
- Upgrade path: Add a whole-house system later when budget allows.
Well Water Owners: No One Is Testing for You
The EPA's PFAS rules apply only to public water systems. If you have a private well, no government agency is required to test your water for PFAS. You are responsible for testing and treating your own supply. PFAS can migrate through groundwater for miles, so even rural wells far from obvious contamination sources can be affected. A USGS study found detectable PFAS in at least 45% of U.S. tap water samples, including private wells (USGS, 2023).
If you already have a well water filtration system and want to add PFAS protection, or you are evaluating whether a carbon filter makes sense for your well water, call Aidan at 800-460-5810 to discuss how PFAS filtration fits into your existing setup.
What Are PFAS and Why Do They Matter?
PFAS (per- and polyfluoroalkyl substances) are a group of over 15,000 synthetic chemicals manufactured since the 1940s. They are called "forever chemicals" because their carbon-fluorine bond is one of the strongest in chemistry and they do not break down naturally in the environment, in water treatment plants, or in your body. For the full picture on PFAS, including how they get into water and what the EPA is doing about it, see our Complete PFAS Guide.
You have encountered PFAS in nonstick cookware (Teflon), stain-resistant fabrics, food packaging, and firefighting foam (AFFF). For decades, these chemicals were discharged into waterways and landfills. They have since made their way into groundwater, surface water, and drinking water supplies across all 50 states.
EPA PFAS Limits
In April 2024, the EPA finalized the first-ever enforceable drinking water limits for PFAS. The Maximum Contaminant Levels for PFOA and PFOS are each set at 4 parts per trillion (ppt), the strictest standard the EPA has ever set for any contaminant. Public water systems must comply by 2031. The EPA announced in May 2025 that it will keep these limits in place while reconsidering limits for other PFAS compounds (EPA, May 2025).
Why "Parts Per Trillion" Matters for Filter Selection
4 parts per trillion is equivalent to about 4 drops of water in 20 Olympic-sized swimming pools. The fact that the EPA set limits this low reflects how toxic these compounds are at very small concentrations over time. This is precisely why filter technology matters: removing a contaminant to parts-per-trillion levels requires more than a basic carbon cartridge. It requires either a large-bed carbon system with adequate contact time, a PFAS-specific ion exchange resin, or a reverse osmosis membrane. Standard filters designed for chlorine or sediment do not operate at this level of precision.
Health Concerns
PFAS exposure has been linked to cancer (kidney, testicular), thyroid disease, immune system suppression, reproductive harm, elevated cholesterol, and liver damage in peer-reviewed studies reviewed by the EPA, CDC/ATSDR, and the National Academies of Sciences. Vulnerable populations include pregnant women, infants, children, and immunocompromised individuals. For a detailed breakdown of the research on each body system, see our PFAS Health Effects guide. Sources: EPA PFAS Health Risks, CDC/ATSDR.
Common Sources of PFAS in Water
- Military bases and airports: AFFF firefighting foam training has contaminated groundwater at hundreds of installations.
- Industrial manufacturing: Factories that use or produce PFAS discharge into rivers and groundwater.
- Landfills: Consumer products containing PFAS leach into groundwater over time.
- Wastewater treatment plants: Conventional treatment does not remove PFAS. Treated effluent carries them downstream.
- Agricultural runoff: Biosolids (sewage sludge) applied to farmland can contain PFAS that migrate to groundwater.
Use the EWG PFAS Contamination Map to check for known contamination sites near your home. For a full state-by-state breakdown of contamination data and regulations, see our PFAS Contamination by State guide.
Maintenance and Long-Term Cost
Every PFAS filter requires some ongoing maintenance. Here is what to expect for each system so you can plan your total cost of ownership.
| System | Upfront Cost | Media / Filter Life | Ongoing Cost | Maintenance |
|---|---|---|---|---|
| PFAS System (Ion Exchange) | $1,695 | 3-7 years | Resin replacement (contact us for pricing when due) | Annual PFAS water test to monitor performance. No backwashing, no electricity, no programming. |
| Carbon Filter (Backwashing) | $1,495 to $1,695 | 3-5 years | ~$200 to $300 for replacement carbon media | Self-cleaning backwash cycle runs automatically. Replace carbon media when exhausted. |
| Carbon Filter (Non-Backwashing) | $1,495 to $1,695 | 3-5 years | ~$200 to $300 for replacement carbon media | No backwash, no electricity. Replace carbon media when exhausted. |
| Pure-75 RO | $595 | 6-12 months (pre/post filters), 2-3 years (membrane) | ~$50 to $80/year for replacement filters | Replace pre-filters every 6-12 months. Replace RO membrane every 2-3 years. |
DIY Installation, Free Support
All of these systems are designed for homeowner installation. Whole-house systems connect to your main water line with standard plumbing fittings (typically 1-inch). The RO installs under your kitchen sink. Every system comes with detailed instructions, and Aidan provides free phone support at 800-460-5810 if you need help during the install. No plumber required.
Frequently Asked Questions
What is the best water filter to get rid of PFAS?
The most effective residential PFAS filter is a dedicated ion exchange system using PFAS-selective resin (like ResinTech SIR-110-HP). It removes PFOA, PFOS, and other PFAS compounds to non-detect levels. For drinking water specifically, reverse osmosis removes 90-99%+ of all PFAS types. Whole-house carbon filters are effective for PFOA and PFOS but less reliable for short-chain PFAS. The best overall approach combines a whole-house system (ion exchange or carbon) with an under-sink RO for drinking water.
Does boiling water remove PFAS?
No. Boiling does not remove PFAS. It actually concentrates them because the water evaporates but the chemicals remain behind. You need a physical or chemical removal process: ion exchange resin, activated carbon adsorption, or reverse osmosis membrane filtration.
Does a Brita filter remove PFAS?
Some Brita filters provide partial reduction of PFOA and PFOS, but performance varies by model. Standard Brita pitchers use a small amount of activated carbon with very limited contact time. If PFAS is a primary concern, look for filters specifically certified to NSF/ANSI Standard 53 with PFAS-specific claims, or use a reverse osmosis system for your drinking water.
Can PFAS be absorbed through the skin during showers?
Early research suggests some PFAS compounds can be absorbed through the skin, and that inhalation of PFAS-containing steam during hot showers is a potential exposure route. This is one reason a whole-house filtration system (not just a drinking water filter) provides more comprehensive protection. Both our PFAS removal system and whole-house carbon filters treat every tap, shower, and appliance in your home.
How often do I need to replace the media in a PFAS filter?
For the dedicated PFAS ion exchange system, the resin typically lasts 3 to 7 years depending on your water's PFAS concentration, total organic carbon, and competing anions. Annual PFAS testing of your treated water tells you when it is time to replace. For whole-house carbon filters, the carbon media lasts 3 to 5 years. Backwashing models self-clean to extend media life. For RO systems, replace pre/post filters every 6 to 12 months and the membrane every 2 to 3 years.
Is well water safer than city water for PFAS?
Not necessarily. Well water may or may not contain PFAS depending on your proximity to contamination sources and aquifer characteristics. The difference is that city water is now required to be tested and eventually treated for PFAS under federal law. Well water has no such requirement. The only way to know your well water's PFAS status is to test it. If you are on well water, see our complete guide to well water filtration for the full picture.
What is the difference between NSF 53 and NSF 58 for PFAS?
NSF/ANSI 53 covers activated carbon and adsorption-based filters. NSF/ANSI 58 covers reverse osmosis systems. Both certifications are relevant for PFAS removal, but they apply to different technologies. When shopping for a PFAS filter, look for one or both of these certifications with specific PFAS reduction claims. Our dedicated PFAS system carries a WQA Gold Seal certification.
Do whole-house carbon filters remove all types of PFAS?
Whole-house carbon filters are most effective for longer-chain PFAS like PFOA and PFOS (the two with enforceable EPA limits). Shorter-chain PFAS break through carbon beds faster. For comprehensive removal of all PFAS types, including short-chain compounds, either use a dedicated PFAS ion exchange system or pair a carbon filter with an under-sink RO at the kitchen sink.
How much does PFAS water testing cost?
A comprehensive PFAS water test typically costs $200 to $400 through a certified laboratory. This covers analysis using EPA Method 533 or 537.1. Some states offer free or subsidized PFAS testing for private well owners; check with your state Department of Health. If you are on municipal water, check your utility's Consumer Confidence Report first, as many have already tested.
Can I install a PFAS water filter myself?
Yes. All three system types (ion exchange, carbon, and RO) are designed for homeowner installation. Whole-house systems connect to your main water line with standard plumbing fittings. Under-sink RO connects to the cold water line under your kitchen sink. All systems include instructions, and Aidan provides free phone support at 800-460-5810 if you need help during the install.
Will my water utility fix PFAS contamination?
Eventually, if they exceed the legal limit. Public water systems must comply with the EPA's PFAS MCLs by 2031. However, that deadline is years away, and many systems have not started treatment installation. Until your utility achieves compliance, a home filtration system is the only way to reduce your PFAS exposure now.
Choosing the Right PFAS Filter
Under-sink reverse osmosis is one of the most reliable methods for PFAS removal. See What Does Reverse Osmosis Remove? for the full contaminant list, and our Best Under-Sink Water Filter Guide for system comparisons.
About the Author: This article was written by Aidan Walsh, owner of Mid Atlantic Water and a water treatment specialist with over 30 years of field experience. Aidan has helped thousands of homeowners diagnose and solve water quality problems across the United States. All health claims in this article are cited to EPA, CDC/ATSDR, and peer-reviewed research. For a personalized recommendation based on your water test results, call Aidan directly at 800-460-5810 or email support@midatlanticwater.net.