Whole House Water Filter: Is It Worth the Investment?

Written by:

Maia James

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Filtering your water is one of the easiest ways to reduce your family’s exposure to a range of toxins–a good filter can get rid of contaminants like chlorine, PFAS (forever chemicals), microplastics, and heavy metals. There are a bunch of different ways that you can filter your drinking water (more on that below), but one question we frequently get is: what’s the best whole house water filter system?

Here’s a comprehensive breakdown to help you decide if a whole house water filtration solution would suit your needs, the best whole house water filter systems on the market, what to consider when choosing one, and the specific whole-house filter we recommend.

Skip to the bottom line.


Before we talk about the most expensive water filters you can buy, let’s start by looking at the other water filter options besides whole house filtration.

Pitcher Filters: Convenient, but Limited

Pitcher filters are an easy and affordable option for water filtration. Pitcher devices use replaceable filter cartridges to improve water taste and remove basic contaminants (and some of the newer ones take out PFAS, too!). They’re ideal for renters, smaller households, or anyone looking for a quick and easy way to filter their drinking water.

In addition to our under-counter filter, we also have this pitcher filter in our fridge because my boys like to have ice-cold water available at all times. We published a whole guide on pitcher filters, which you can read here. Our favorite brand are Aquagear, LARQ, and Lifestraw.

(Here is why we don’t like Pur 7, Clear20, or BRITA.)


Under-Sink Filtration Systems: A Popular Choice for Targeted Use

Under-sink filtration systems are designed to purify water at a specific point, typically in your kitchen. They’re compact, effective, and convenient for ensuring safe drinking and cooking water. We recommend this 3-stage under-sink water filter, which eliminates a range of common contaminants, including PFAS.

Advantages of Under-Sink Filters

  • Targeted Filtration: Focused on drinking and cooking water, these systems are great for households prioritizing water safety in the kitchen.
  • Effective Removal of Contaminants: If you choose the right filter, it can handle:
    • Forever chemicals (PFAS)
    • Microplastics
    • VOCs (volatile organic compounds)
    • Heavy metals like lead and mercury
    • Many other contaminants

Note: There are some filters that you can put on the counter versus under it; you can read more about those in this guide.

Our favorite non-whole house filters are an under-counter and an above-counter.

Kitchen-based water filter systems have limitations. They don’t address water used in other parts of the home, like the bathroom or laundry room, where contaminants may also pose risks.


The Emerging Risks of Contaminated Water in the Bathroom

It turns out that your shower or bath can expose you to harmful chemicals just as much as the water you drink. One study published in Environmental Health Perspectives  found that activities like bathing can lead to significant increases in trihalomethanes (THMs), which are byproducts of chlorine, primarily through inhalation and dermal absorption. In contrast, drinking the same water resulted in only a small increase in THM levels. This suggests that inhalation and skin absorption during activities like showering may be more significant routes of exposure to certain water contaminants than ingestion. Let’s look more closely at how bathing might expose you to chemicals of concern.

Inhalation of Chemicals During a Shower

Bathrooms are typically confined spaces, and steam can concentrate airborne chemicals. Breathing in this concentrated steam increases your exposure to a variety of toxicants compared to drinking the same amount of water, including:

  • Chlorine Gas: Chlorine, used as a disinfectant in municipal water supplies, can vaporize in hot water. When you take a hot shower, chlorine can be released as a gas into the steam, which you can inhale. Inhaling chlorine gas can be more harmful than ingesting chlorinated water because it goes directly into your lungs and bloodstream.
  • Volatile Organic Compounds (VOCs): VOCs (like the aforementioned THMs) are more volatile at higher temperatures. You may inhale these chemicals in the steam during a shower.

Skin Absorption

  • The skin is a highly absorbent organ, especially in warm, humid conditions like a shower. Chemicals like chlorine and contaminants like PFAS can pass through the skin barrier during a shower or bath.
  • Absorption through the skin can bypass the digestive system and liver, where ingested toxins are partially metabolized and filtered out, potentially leading to a more direct and impactful exposure.

Mitigating the Risks

There are a few ways you can reduce the dose of the chemicals you might absorb or inhale during a shower or bath:

  • Install a Shower Filter: Filters designed to remove chlorine and VOCs can significantly reduce exposure. Here’s a very effective one that doesn’t deplete the water pressure at all! (And here is a chlorine one for the bath.)
  • Ventilation: Use a bathroom fan or open a window to reduce steam concentration.
  • Whole House Filtration: A whole house filter can address these contaminants at the source.

Why Whole House Water Filters Can Be the Best Choice

If you’re concerned about water quality throughout your home, a whole house water filter is the most comprehensive solution. A whole house system filters water at the point it enters your home, protecting all water sources, including showers, faucets, and appliances.

Considerations for Whole House Systems

There are three major drawbacks to whole house water filters:

  • Higher Cost: Whole-house filters are an investment, costing thousands rather than hundreds like an under-counter unit.
  • Space Requirements: These systems are larger and may need a dedicated area, like a basement or utility room.
  • Professional Installation and Upkeep: Unless you’re exceptionally handy, you’ll likely need to hire a plumber to install and replace a whole house filter.

Comparing Whole House Water Filtration Technologies

Choosing the best whole house water filter can feel like a huge undertaking, so I am going to try to break this down for you in a way that makes it less overwhelming. Let’s look at the various types of whole house filters you’re most likely to come across, and the pros and cons to each.

Whole House Reverse Osmosis Filters

RO systems remove up to 99% of contaminants, including the smallest particles, and for the reason many consider RO to be the best whole house water filter.

While RO is the gold standard for pristine water, a whole house RO system is more expensive, more wasteful, and more of a hassle than other filtration options. Some of the main drawback to RO include:

  • Higher cost for the unit itself, and higher space requirements.
  • Slower water output and the need for a storage tank.
  • Potential to strip beneficial minerals (though many systems now offer remineralization).
  • You may or may not see this a a drawback, but reverse osmosis will remove fluoride from your water. (FWIW: I do remove fluoride from our drinking water; more on this below.)
  • RO water systems waste as least twice as much water as they produce, meaning your water consumption (and bill!) will at least double if you choose a whole house RO filter.

If you’re interested in learning about the best whole-house filter using RO technology, call us at 717-413-8182. (It’s not yet available online.)

Whole House Activated Carbon Filters

Activated carbon filters are one of the most common whole house filtration systems, and are typically the best option for most people. They work by adsorbing contaminants onto the surface of the carbon media, effectively removing impurities from your water.

Key Benefits

  • Effective for Many Contaminants: Removes chlorine, VOCs, pesticides, herbicides, and bad tastes/odors. (Can remove PFAS if you get the right one; more on this below.)
  • Low Maintenance: Filters typically last several years.
  • Affordable: These systems are generally more budget-friendly than RO systems.
  • Protects Appliances: Reduces buildup in water heaters, dishwashers, and other appliances.

This is the whole house carbon plus PFAS filter that’s best for most people. John, our in-house water filter expert, is happy to talk about your specific needs if you’d like to give him a call at 717-413-8182.


Whole House UV Water Purification Systems

UV systems use ultraviolet light to kill bacteria, viruses, and other microorganisms in your water, making them an excellent option for microbiological contamination. There’s really no need for this type of filter if you are on a municipal water system–chlorine is added to your water to kill these kind of microbes. But this kind of filter can be a great choice if you use well water.

Key Benefits

  • Highly Effective for Microbial Contamination: Eliminates 99.99% of bacteria, viruses, and parasites without adding chemicals.
  • Compact: UV systems are relatively small and easy to install alongside other filtration systems.

Limitations

  • Doesn’t Remove Chemicals or Sediment: UV systems don’t filter out chlorine, heavy metals, or other chemical contaminants.
  • Requires Clear Water: For UV light to work effectively, water must be clear and free of sediment or turbidity, which may require a pre-filter.

Best For

  • Homes with well water or areas prone to microbial contamination. This one is our pick.

Note: If you have a whole-house filter that removes chlorine at the point where water enters your home, the water flows through your plumbing without disinfection. While the risk of microbial contamination is generally low—especially if you use municipal water and run your taps regularly—it can increase if water sits stagnant, if pipes are exposed to warmth, or if your plumbing is older. A UV filter at the sink can provide extra peace of mind by eliminating any potential microbial growth, particularly for well water users or homes with infrequent water use.

A Note on Whole-House Water Softeners

Water softeners are specifically designed to address hard water issues by removing minerals like calcium and magnesium through an ion exchange process. While these filters won’t remove contaminants like PFAS or heavy metals, they do protect your plumbing from mineral deposits and give you soft water that’s gentler on your skin, hair, and laundry.

If you want just a water softener, this is the best one. You can also get a robust carbon filter that includes a softener system.

Can a Whole House Filter Remove PFAS?

Removing PFAS (per- and polyfluoroalkyl substances) from water is challenging, but certain whole house water filtration systems are effective at addressing these persistent contaminants. If you get specific activated carbon filters (like this one) or any RO filter, these will take PFAS out of your water.

Can a Whole House Filter Remove Fluoride?

Only a whole-house RO filter will remove fluoride, but fluoride is primarily harmful when ingested. Studies link high fluoride intake to lower IQ in children, thyroid disruption, and bone issues. Filtering drinking water is the best way to reduce fluoride exposure. Some claim fluoride can be absorbed through the skin, but research suggests that fluoride absorption through intact skin is minimal, so our advice is to get a fluoride filter for your kitchen sink, and nothing else.

If you want more details on how we feel about fluoride, you can find that here. TLDR: Get it out of your water, but use it in your toothpaste if you get cavities.

How to Choose the Best Whole House Water Filter

To select the right filtration system, consider the following factors:

  1. Water Quality: You can test the quality of the water coming into your home to see what specific contaminants you might be dealing with. That said, for most people, testing their water isn’t necessary to choose a reliable whole-house system that effectively removes the common contaminants found in nearly all municipal water supplies.
  2. Budget: Whole-house systems can be costly (over a thousand dollar in most cases), so plan your investment accordingly.
  3. Space: Ensure you have room for installation. You will typically need a basement, utility room, or garage to fit the system.

To schedule a (free) consult with John to discuss your specific needs, please call us at 717-413-8182.

Just Tell Me What to Buy

If it’s helpful: After a consult, most people end up choosing this filter because it covers all your bases in one unit that’s easier and less expensive and wasteful than RO.

A water filter system.

Cost and Installation of the Best Whole House Water Filter System

When it comes to investing in clean, safe water for your entire home, a whole-house water filtration system is one of the most effective solutions. However, such a high-performance system requires some upfront and ongoing costs, plus a more complicated installation process than an under-counter filter for just drinking water.

Cost of Whole House Water Filtration System

  • Upfront Investment: Whole-house systems are among the most advanced and comprehensive water filtration options, and they reflects that with a price range typically starting above a thousand dollars.
  • Maintenance Costs: Regular maintenance is essential to keep the system running efficiently, and this includes replacing the main filter, typically every year-ish, for a family of two adults and two kids. The annual cost of replacing that filter is just over $1 a day. The whole house unit we recommend alerts you when it needs to be replaced.

Installation Process

Installing a whole house water filter typically requires professional expertise due to its complexity and size. A licensed plumber can easily handle the setup, which includes connecting the system to your home’s main water supply. If you choose an RO system, it will generate wastewater during the filtration process. The installer will set up a drain line to dispose of this water efficiently.

What About a Sediment Pre-Filter?

If you live in an area with high sediment, it’s worth adding a pre-filter to your whole-house unit. You won’t need to replace this often if you don’t have high-sediment water, and you’ll know when you need to because water pressure will become a problem. Heads up: If you live in New York City, like I do, you definitely need the pre-filter. Other high-sediment cities include Atlanta and San Francisco. (If you’re in LA or Boston you likely do NOT need a pre-filter.)

Final Thoughts: Is a Whole-House Water Filter Worth It?

For households looking for comprehensive water safety, getting a whole-house water filter is a worthwhile investment. While pitcher and under-sink filters are effective for drinking water, they can’t address exposure from showers or other water sources.

For almost everyone, we recommend one of the following two options:

  1. An under-counter filter in the kitchen and showerhead filters in the bathrooms. This can be installed with the skills and tools found in most households.
    OR
  2. A whole-house activated carbon filter. For this, you need a plumber (but it’s an easy job for them!). We still recommend a fluoride filter for under the kitchen sink in this case.

If you still have questions, John is happy to help you choose the best whole-house water filter (or another type of filter) for your needs. Feel free to give him a call at 717-413-8182.

Stay sane,

Maia, Founder & CEO

John, Certified Holistic Health Coach

Best Water Filters from Gimme’s Marketplace

Whole House Water Filters FAQ

What contaminants can the best whole house water filter remove?

The best whole house water filters can remove a wide range of contaminants, depending on the type of system. Common contaminants include:

  • Microbial Contaminants: UV filtration or advanced systems can address bacteria, viruses, and cysts.
  • Chlorine and Chloramine: Improves taste, smell, and water safety.
  • Sediment: Removes dirt, sand, and rust that can clog plumbing and appliances.
  • VOCs (Volatile Organic Compounds): Eliminates harmful chemicals that may affect health.
  • PFAS (Forever Chemicals): Advanced systems like reverse osmosis or activated carbon filters can reduce these persistent toxins.
  • Heavy Metals: Removes lead, mercury, and iron.

Can a whole house water filter remove PFAS (Forever Chemicals)?

Yes, some of the best whole house water filters are effective at removing PFAS. Systems that use activated carbon or reverse osmosis (RO) technology are particularly good at reducing PFAS levels. For example:

  • Activated Carbon Systems: These can remove up to 90% of PFAS when properly maintained.
  • Reverse Osmosis Systems: These offer the most comprehensive removal of PFAS and other toxic contaminants.

Be sure to select a filter certified for PFAS reduction, such as those meeting NSF/ANSI standards.

Is a whole house filter a good idea?

Yes, a whole house water filter is a great idea if you’re looking to improve water quality throughout your home. Unlike point-of-use filters, a whole house system ensures that all the water—used for drinking, cooking, bathing, and cleaning—is filtered and free of harmful contaminants. It’s especially beneficial for removing chlorine, sediment, VOCs, and other pollutants that can affect your health and damage plumbing or appliances.


Does a whole house water filter add value to your home?

Yes, installing a whole house water filter can increase your home’s value. Buyers often see a high-quality water filtration system as a desirable feature, especially in areas with hard water or known water quality issues. A whole house filter protects plumbing and appliances, reduces maintenance costs, and provides peace of mind, making it an appealing upgrade.


Is a whole house water filter tax deductible?

In general, a whole house water filter is not tax deductible for personal use. However, if you operate a home-based business where filtered water is necessary (e.g., for equipment maintenance or specific processes), you might be able to deduct it as a business expense. Consult a tax professional to determine if your specific situation qualifies.


How long do whole house filters last?

The lifespan of a whole house water filter depends on the type of system and the quality of your water. On average:

  • Sediment Pre-Filters: Last 6–12 months, or as needed.
  • Carbon Filters: Last 6–12 months for cartridges or 3-10 years depending on the brand.
  • UV Lamps: Need to be replaced annually.
  • Reverse Osmosis Membranes: Last 2–3 years.

Regular maintenance and timely replacement of filters are essential for optimal performance.


Where should a whole house filter be installed?

A whole house water filter should be installed at the main water line, typically near where water enters your home. This placement ensures that all water used in your home—whether for drinking, bathing, or cleaning—is filtered. Common installation locations include:

  • Basement
  • Utility Room
  • Garage The system should be installed before the water heater to protect it from sediment and contaminants.

How much should a whole house filter cost?

The cost of a whole house water filter varies based on the system type and features:

  • Basic Systems: $500–$1,000 for sediment and chlorine filtration.
  • Mid-Range Systems: $1,500–$3,000 for activated carbon or UV filtration.
  • Advanced Systems: $4,000–$10,000 for whole house reverse osmosis or multi-stage systems.

Professional installation typically costs $500–$2,000, depending on the complexity of the system and your home’s plumbing.


What is the healthiest way to filter water?

The healthiest way to filter water depends on your specific water quality concerns. The best whole house water filter systems often combine multiple technologies to address a wide range of contaminants, including reverse osmosis and activated carbon.

Note: This article contains affiliate links or sponsored content, which means that if you make a purchase, we may earn a commission. We only recommend products that meet our strict standards for non-toxicity and that we use (or want to use!) ourselves. Thank you so much for supporting the brands that make Good Stuff! 

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