Best Whole House Water Filters for PFAS Removal: Eliminate Forever Chemicals With Multi-Stage Filtration

Our Verdict and How We Chose

The right whole house water filter provides a consistent barrier against “forever chemicals” like PFOA and PFOS, ensuring that your entire home’s plumbing delivers treated water. Achieving a high reduction rate is the primary goal for those concerned about specific industrial contaminants in their municipal or well water.

The iSpring WGB21B-PFKS PFAS & Heavy Metals Filter provides this protection with its SGS-tested media and 99% PFAS reduction rate. For users needing a larger treatment capacity of 100,000 gallons, the iSpring PFAS & Heavy Metals Whole House Filter is a robust choice, while the iSpring WGB32B-PF PFAS Whole House Water Filter System serves those who prefer a 3-stage system including a high-capacity sediment filter.

At Green Writer, we screened 52 Whole House Water Filtration Systems to identify the 7 models featured in our comparison. The selection spans from $255.98 to $1310.99, with a median price of $407.09.

Review the scope to understand what types of systems are included in this list.

Consult the buying guide to learn the key criteria for choosing the right filter.

Use the audience checklist to find the best match for your specific household needs.

Whole House Water Filtration Systems Compared Side by Side

Prices are approximate and move frequently – check the current price before deciding. “Not stated” means the manufacturer listing does not give that figure – we do not estimate it.

Among our top picks, the value leader is iSpring WGB21B-PFKS PFAS & Heavy Metals Filter because it provides a low cost per gallon for PFAS removal.

Each A Whole House Water Filtration System We Picked, Reviewed in Detail

The 3 picks below are reviewed in the same order as the cards above.

iSpring WGB21B-PFKS PFAS & Heavy Metals Filter

The iSpring WGB21B-PFKS made the list because it provides a high 99% PFAS reduction rate at an accessible entry-level price point. It is designed specifically to target PFOA and PFOS while addressing heavy metal concerns.

What we like: This system features a two-stage design that uses KDF and granular activated carbon (GAC) to reduce chlorine and heavy metals. The 50,000-gallon filtration capacity allows the media to last up to 12 months depending on your water usage.

Keep in mind: The 50,000-gallon capacity is lower than the 150,000-gallon benchmark for standard 20-inch cartridges, which may require more frequent media changes for high-volume households.

iSpring PFAS & Heavy Metals Whole House Filter

We selected this model for its high-capacity 100,000-gallon filtration volume and its 20-inch filter media diameter. It provides a robust solution for those needing a larger service life than the entry-level models.

What we like: The 20-inch media diameter provides a large surface area for the SGS-tested media to reduce 99% of PFAS. It also includes a dedicated sediment filter to capture particles as small as 5 microns.

Keep in mind: At the $1,310.99 price point, this is a significant investment for those who prioritize a longer service life over a lower upfront cost.

iSpring WGB32B-PF PFAS Whole House Water Filter System

This 3-stage system was included for its balance of high-capacity filtration and comprehensive multi-stage treatment. It offers a 100,000-gallon capacity while providing a more complex filtration path than the 2-stage options.

What we like: This system includes three distinct stages, including a high-capacity sediment filter and two carbon filters to improve taste and odor. It provides a 99% PFAS reduction rate and a 100,000-gallon treatment volume.

Keep in mind: This model does not state an SGS-Tested certification or a specific “Whole House” installation designation in its technical data, unlike some other models on this list.

You can find a detailed performance breakdown in our full PUREPLUS 2-Stage Filter review.

The Specs That Decide an A Whole House Water Filtration System

Prioritizing a 99% PFAS reduction rate for water filtration

Prioritize a 99% PFAS reduction rate to ensure the system captures the majority of PFOA and PFOS, which are common “forever chemicals” in water supplies. The iSpring WGB21B-PFKS and the iSpring PFAS & Heavy Metals Whole House Filter both state a 99% reduction rate, while the iSpring WGB32B-PF PFAS Whole House Water Filter System reaches up to 99%. Specialized PFAS resins, which are engineered to trap these specific chemicals, often outperform standard Granular Activated Carbon (GAC)—a common media for large scale filtration—in high-concentration scenarios. Because GAC is the standard industry abbreviation for carbon media, it is often used in multi-stage systems to also reduce chlorine and lead.

Flow Rate Capacity

Ensure your system can handle your home’s peak demand by confirming the connections match your main line, as these systems typically use 1″ NPT ports to maintain pressure for showers and appliances simultaneously. While the specific gallons per minute is not stated for these models, the 1″ NPT inlet and outlet size on the iSpring PFAS & Heavy Metals Whole House Filter and the iSpring WGB32B-PF PFAS Whole House Water Filter System are designed to accommodate standard residential flow. A filter that cannot handle high volume will cause a pressure drop, restricting water flow to multiple fixtures at once. Unlike Ion Exchange Softeners, which are the standard for hardness removal, these filtration systems focus on chemical and particle removal through media depth.

Determining filter media lifespan based on daily household water usage

Select a system based on your household’s daily water usage to determine how often you must replace the internal cartridges. The iSpring WGB21B-PFKS is rated for a 50,000-gallon filtration capacity, while the iSpring PFAS & Heavy Metals Whole House Filter and the iSpring WGB32B-PF PFAS Whole House Water Filter System both offer a 100,000-gallon capacity. These capacities represent the total volume of water processed before the media is exhausted. To maintain effectiveness, replace the media once the capacity is reached or every 12 months, depending on which occurs first.

Measuring the physical footprint of the 20 inch filter diameter

Measure your available space to ensure the unit fits, as the iSpring PFAS & Heavy Metals Whole House Filter features a 20-inch filter media diameter, which defines the level of physical particle removal. The iSpring WGB32B-PF PFAS Whole House Water Filter System also utilizes a 20″ x 4.5″ media diameter. These dimensions are larger than standard 20-inch sediment/carbon cartridges found in Multi-Media Tanks, which are large-scale gravity fed systems used as the benchmark for high-flow sediment removal. Confirm your mounting area can accommodate these dimensions before ordering.

How micron ratings determine pressure drop and particle capture

Verify that the system maintains adequate pressure for your home by checking the micron rating, which identifies the size of particles the filter traps. The iSpring WGB21B-PFKS and the iSpring PFAS & Heavy Metals Whole House Filter both state they capture particles as small as 5 microns. A lower micron rating provides finer filtration but can increase the risk of a pressure drop if the surface area is insufficient. If you require high-pressure output for specific fixtures, prioritize systems with larger media diameters like the 20-inch options provided here.

New users can view the whole house water filtration system terms and specs explained to understand the technical data.

What Each Job Calls For vs What These Picks State

Match the job you actually need done to the figure it calls for, then check which picks state that figure or more. Where none do, the row says so.

These figures are the levels this category is generally held to, not manufacturer claims. A pick at or above a figure states that number; how it reaches it and the rest of your setup still decide the job, so check them against your own workload before buying.

Who Buys Whole House Water Filtration Systems, and What It Really Costs

What These Whole House Water Filtration Systems Need, and What to Check on Arrival

Installation and Setup Requirements

While these systems do not require a professional plumber to install, you should confirm if your local building codes require a permit for main line filtration before you begin.

All three systems require a 1″ NPT connection, which is the standard plumbing size for most residential main line connections, to function.

• The iSpring WGB32B-PF PFAS Whole House Water Filter System includes a high-capacity sediment filter and two carbon filters in the box.
• The iSpring WGB21B-PFKS and the iSpring PFAS & Heavy Metals Whole House Filter both state they use SGS-tested media to target PFOA and PFOS.
• The iSpring PFAS & Heavy Metals Whole House Filter features a 20 inch filter media diameter, which is the width of the internal filtration material.

Verifying Your Order Upon Arrival

Warranty cover and return windows differ by seller and country, so you should verify your specific protections as soon as the shipment arrives.

• Confirm the 1″ NPT inlet and outlet ports are undamaged, as these are the primary plumbing connections for the system.
• Check that the iSpring PFAS & Heavy Metals Whole House Filter includes the 20 inch media, as the large diameter is the primary component for its 100,000 gallon capacity.
• Verify the presence of the 2-stage or 3-stage components as specified, to ensure the system can process the correct filtration stages for your water.
• Inspect the housing for any cracks or shipping damage, as the pressurized vessels are difficult to repair once installed.

The first thing to do the day it arrives is to cross-reference the included filter types against the model’s stated specifications to ensure all media is present before you begin the installation.

Visit the FAQ to find answers to common questions about PFAS filtration.

Check the requirements to see the minimum specifications for effective water treatment.

View the comparison table to see our top selections compared side by side.

Buying Questions About Whole House Water Filtration Systems, Answered

Which whole house water filter is best for PFAS removal?

The whole house water filter that provides the best PFAS removal depends on your required filtration capacity and budget. The iSpring WGB21B-PFKS PFAS & Heavy Metals Filter offers a 99% PFAS reduction rate with a 50,000-gallon capacity for $255.98. For larger volume needs, the iSpring PFAS & Heavy Metals Whole House Filter treats 100,000 gallons of water at a 99% reduction rate for $1,310.99.

How much will it cost to own these filters over 5 years?

The total cost of ownership over 5 years depends on your household’s annual water usage and the price of replacement cartridges. Since the iSpring WGB21B-PFKS PFAS & Heavy Metals Filter has a 50,000-gallon capacity, a household using 10,000 gallons a year would replace the filter every 5 years. If you use more than 10,000 gallons annually, you will need to factor in more frequent cartridge replacements to maintain the 99% PFAS reduction rate.

Will these systems remove other common contaminants like chlorine and heavy metals?

These systems remove other common contaminants like chlorine and heavy metals by using multi-stage media. The iSpring WGB21B-PFKS PFAS & Heavy Metals Filter uses KDF and granular activated carbon (GAC) to reduce lead, mercury, and hydrogen sulfide (HS). The iSpring PFAS & Heavy Metals Whole House Filter also utilizes KDF and GAC to target these specific contaminants alongside PFAS.

Do I need a pre-filter to protect the main PFAS unit?

A pre-filter is often used to protect the main PFAS unit by trapping sediment before it reaches the specialty media. While the iSpring WGB32B-PF PFAS Whole House Water Filter System includes a high-capacity sediment filter, you should check if your water source requires a dedicated pre-filter to prevent media breakthrough. Media breakthrough occurs when exhausted media allows contaminants to pass through, rendering the system useless.

Which filter should I choose for my home?

The filter you should choose for your home depends on your specific water volume and budget. If you need a compact, entry-level solution, the iSpring WGB21B-PFKS PFAS & Heavy Metals Filter provides a 99% reduction rate for $255.98. For a high-capacity system that handles 100,000 gallons, the iSpring PFAS & Heavy Metals Whole House Filter is a higher-volume option at $1,310.99.

See our top picks for a quick overview of the best-rated systems.

Look at the setup and warranty notes for installation details and manufacturer support.

Explore the detailed reviews for an in-depth look at each individual product.

Consider exploring different whole house water filtration system alternatives if a standard setup doesn’t fit your needs.

Who Should Skip These Whole House Water Filtration Systems

When you notice a decrease in water pressure at your showerhead or kitchen sink, it may indicate a pressure drop, which occurs when a filter has too small a surface area to allow sufficient flow. To avoid this, verify the filter media diameter and surface area requirements for your home’s flow rate before you order.

If you require high-capacity filtration for large volume, these three picks may not suit your needs. None of these selections reach the 150,000 gallons filtration capacity, which is the typical lifecycle capacity for a standard 20-inch sediment/carbon cartridge.

If you need a system that meets that 150,000 gallon threshold, you should look for high-capacity industrial or multi-media systems. If you are specifically looking for other types of water treatment, you may find more relevant options in best whole house water filter for large families.