Choosing a Water Filter System: Which Is Best for You?(2024)

Updated on:
March 6, 2024

Water is the essence of life, and in our modern world, ensuring its purity has become more crucial than ever. With a plethora of contaminants potentially lurking in every drop, modern households have implemented the water filtration system as a solution. 

But as with any household item, these filters have a lifecycle, and understanding how to select, use, and eventually dispose of them is vital. 

This guide delves into the intricacies of buying a quality water filter, ensuring you make an informed decision that will boost not only your water quality but also your life’s quality.

Evaluate Your Water Needs

It’s not about which type of water filter system is best overall. What you need to know is which is best for you. So there are a few things you should consider before you should even begin looking at filters. 

  • Your water supply: Where’s your water coming from? A well? A city supply? Knowing your water source can help you make an informed decision about the type of filter you need.
  • Your water quality: You really should consider having your water tested before buying a filtration system. You need to know what contaminants you’re dealing with. You can buy a home test kit or send it away to a lab. You should also study local water reports. 
  • POE or POU: Point-of-entry systems are whole-house filtration systems, treating water as it enters your home; point-of-use systems treat water at specific use points, like the kitchen sink. If you only need to improve your drinking water and not the water you use for showers and cleaning, a POU system is more practical.
  • Daily consumption: Estimate how much filtered water your household consumes daily. For example, if you travel or move frequently, portable options like water filter pitchers or countertop filters might be more suitable.Do you also use filtered water for cooking, pets, or plants? This can affect the amount you need, i.e., the tank size for a POU system.
  • Installation: Some systems might require professional installation, while others are DIY.
  • Space: Some filters, like under-sink systems and water softeners, require more space. Ensure you have the room before purchasing.
  • Budget: Filters come in a range of prices. Determine your budget first, then find the best option within that range.

Types of Water Filtration Systems

Navigating the myriad water filter types is crucial in any quest for pure, contaminant-free water at home. To narrow down your search, I’ve separated the types of filter into point-of-entry filters and point-of-use water filters. 

Point of entry (POE): whole-house water filters

Installed directly at the point where water enters your home, whole house water filtration systems ensure that every drop of water, whether it’s for drinking, cooking, or bathing, is treated and purified. Let’s explore the advantages of having a comprehensive filtration system for your entire home.

Carbon filtration

Using activated carbon, these filters act like a sponge, absorbing and trapping contaminants as water flows through.

If you’ve noticed a chlorine taste or peculiar odor in your tap water, carbon filters are your solution. They excel at removing organic compounds and chlorine, enhancing the overall taste and aroma of your water.


  • Improves taste and odor
  • More affordable than other options


  • Limited filtration ability
  • Requires frequent filter replacement

Reverse osmosis filtration

Reverse osmosis filters employ a specialized membrane. As water is forced through, a vast majority of contaminants are left behind, ensuring you get pure, clean water. They’re best for homes facing a variety of contaminants. From heavy metals to certain chemicals, RO filters offer a comprehensive solution.

A reverse osmosis system is a good investment if you’re in an area with known water quality issues and you want thorough, trustworthy purification.


  • Removes up to 99% of contaminants
  • Improved taste
  • Space-efficient


  • High water waste
  • Can be slower than other methods
  • Requires regular maintenance

Ion exchange filtration

Ion exchange is the preferred method of water softening. These units swap out undesirable ions in your water with more favorable ones, softening it in the process. Ion exchange is perfect for homes dealing with hard water issues. 

If you’re facing challenges like mineral deposits on fixtures, or dull and drab hair or clothing, or you want to prolong the life of your appliances, a water softener is a good idea.


  • Highly effective softening
  • Reliable appliances


  • Regular maintenance required
  • Salt-based units may not be suitable for sodium-restricted diets
  • Can impact the environment
  • High water usage

Ultraviolet (UV) filtration

A specialized UV lamp emits light that neutralizes harmful pathogens, ensuring they can’t reproduce. When bacteria, viruses, or other microorganisms are a concern, UV filters offer a chemical-free solution. If you’re in an area where waterborne illnesses might be prevalent or if you’re using a well or another untreated water source, look into UV filtration.


  • Chemical-free
  • Neutralizes most pathogens
  • Low-maintenance


  • Requires electricity
  • Doesn’t remove chemicals, only living organisms
  • Periodic bulb changes needed
  • No replacement filter costs

Ultra-filtration (UF)

An ultra-filtration system uses a membrane to trap larger particles and contaminants. It can address bacteria, viruses, and larger particulates. It’s for you if you’re seeking balance between filtration and flow rate, especially in areas with microbial concerns.


  • Targets a broad spectrum of harmful contaminants (bacteria, viruses, and particulates)
  • Doesn’t use chemicals
  • Fast flow rate


  • Limited to larger contaminants; can’t remove dissolved salts or chemicals
  • Membrane requires periodic cleaning or replacement
  • Doesn’t soften water

Micro-filtration (MF)

Using a membrane with larger pores than ultra-filtration systems, MF filters trap larger particles and some microorganisms, delivering clearer water. It can remove sediments, sand, and certain bacteria, ensuring water clarity.

These types of systems are good if you’re facing turbid water or visible particulates. Ideal for pre-filtration, they set the stage for deeper purification, though they might not address dissolved contaminants or viruses as effectively.


  • Effectively removes visible impurities
  • Pre-filtration: prepares water for further purification stages


  • Doesn’t address dissolved contaminants or viruses
  • Requires periodic cleaning or replacement

Alkaline or pH balance filtration

These filters adjust the pH level of your water, typically making it more alkaline by adding minerals or using a special ionizing process. It’s best for those intrigued by the potential health benefits of alkaline water or wishing to neutralize an acidic water source.

If balancing your water’s pH for health reasons is a priority or if you’re keen on exploring the benefits of alkaline water, go ahead and give one a try. After all, many systems these days offer 30-day money-back guarantees.


  • Reported health advantages
  • Neutralizes acidity


  • Typically pricier than basic filters
  • Unproved health benefits

Point-of-use (POU) Filters

A point-of-use water filtration system is strategically positioned at specific water outlets, offering targeted purification right where you consume or use the water.

Faucet-mounted filters

A faucet-mounted filter conveniently attaches right to your faucet’s end, filtering water as you use it. They’re great for individuals seeking a hassle-free installation and the flexibility of easy filter changes.

If you want cleaner water without a long-term commitment or if you’re looking for a quick solution without the fuss of a complete system overhaul, get one of these.


  • Easy installation: no tools or plumbing expertise required
  • Ideal for renters or those who move often


  • Limited filtration
  • Isn’t compatible with all faucet types

Faucet-integrated (built-in) filters

These are integrated into the faucet system itself, ensuring every drop dispensed is purified. They’re nice for people who value a sleek kitchen look without external attachments.

They might be for you if maintaining your kitchen’s aesthetics is a priority and you don’t want to compromise on water quality.


  • No external parts, maintains kitchen aesthetics
  • Automatic filtration every time you use the tap
  • No additional equipment on the countertop or under the sink, saving space


  • Limited filtration
  • Can be more challenging to replace filters
  • Often pricier than external systems
  • Limited to specific faucet designs

Countertop filters

Positioned on your counter and connected directly to your faucet, a countertop water filter purifies water with various media, depending on the brand. They’re best for individuals wanting an efficient filtration system without the complexities of under-sink installation.

If you move a lot and you have oodles of counter space, this might be the filtration method for you


  • Easy installation
  • Ideal for renters or frequent movers
  • Easy to check filter condition and water quality


  • Takes up counter space
  • Might require frequent refilling
  • Might not match all kitchen decors
  • Can be slower than direct plumbing systems

Under-sink filters

Usually employing reverse osmosis technology, these stay tucked away under your sink and connect directly to the water line, under-sink filters ensure purified water is what you get from your faucet. Those seeking top-tier water purification without the clutter of equipment on the countertop will like an under-sink filter.

If you’re after the best in water purification without the visible setup or if you want a hidden powerhouse of filtration, go with an under-sink filter.


  • High filtration quality
  • Keeps countertops clear and tidy, saving space
  • Direct connection to the water line ensures uninterrupted flow


  • Requires some plumbing work
  • Changing filters might require getting under the sink
  • Initial setup can be more expensive than simpler systems
  • Needs sufficient under-sink space for installation

Shower filters

These easily attach to your showerhead, removing chlorine as it cascades down. Individuals who don’t need filtration elsewhere but are sick of the drying effects of chlorine on their skin or hair could benefit from a shower filter.


  • Simple solution to chlorine in shower water
  • Affordable


  • Filters don’t last long
  • Doesn’t filter much more than chlorine

Distillation filtration systems

Distillation heats water into steam and then cools it back into a liquid, and contaminants are separated and left behind. It offers a broad spectrum solution, tackling both organic and inorganic impurities effectively.

Distillation is great for home cooks and chemists aiming for a high purity level, especially if you’re in an area with questionable water sources.


  • Extremely pure water


  • Expensive
  • Energy intensive

Gravity filters

Relying on the natural force of gravity, these filters pull water through one or more filtration elements, often activated carbon, leaving contaminants behind. They’re effective at removing bacteria, protozoa, and chemicals, and they also enhance the water’s overall taste and odor.

If you want a filter that’s versatile, doesn’t need electricity, and can be used from daily home scenarios to camping trips, these are pretty reliable.


  • No electricity needed
  • Portable
  • Suitable for both indoor and outdoor use
  • Low maintenance


  • Slower filtration
  • Limited capacity
  • Manual intervention
  • Might not remove all types of contaminants

Water filter pitchers

Also popular among renters, these user-friendly pitchers come with an integrated filter cartridge. They’re great for daily use and can tackle common contaminants like chlorine, improving the overall taste and clarity of tap water.


  • Easily move it from one place to another.
  • No installation required
  • Initial cost and replacement filters are generally budget-friendly
  • Improves Taste


  • Limited Capacity
  • Not all pitchers remove the same range of contaminants.
  • Filters need regular changing to maintain effectiveness.
  • Might not tackle all water quality issues.

Buying Your Filter: How to Ensure a Wise Investment

Reliable water filtration is a necessity for most people, but it’s also an investment. Knowing how to choose one is only the beginning. A lot more goes into owning a filtration system, so consider the following as you search: 

  • Compare prices. It’s always a good idea to compare prices across different retailers and filtration types. There might be discounts, promotions, or bundle deals to consider. 

Furthermore, some systems, like whole-house filters, have a higher upfront cost but lower ongoing costs. 

  • Check the warranty. A good water filter system should come with a warranty. This not only indicates the manufacturer’s confidence in the product but also provides you with peace of mind. Understand the terms of the warranty, what it covers, and for how long.
  • Understand the return policy. In case the product doesn’t meet your expectations or has defects, it’s crucial to know the return policy. Check the duration for returns, any restocking fees, and if they offer replacements or refunds.
  • Ask about customer support. Post-purchase support can be invaluable, especially if you run into issues with installation or maintenance. Ensure the brand or dealer offers reliable customer service.
  • Check the filter lifespan. Over time, filters lose their effectiveness. Know how often they need to be changed and what the filter replacement cost is to ensure you’re making the right choice.
  • Read the fine print. If you’re purchasing online, read the terms and conditions. Understand shipping costs, delivery times, and any additional fees that might apply.
  • Consider additional costs. Some water filter systems might require professional installation or additional parts. Factor in these costs when making your purchase.
  • Verify authenticity. Unfortunately, counterfeit products exist in the market. Ensure you’re buying an authentic product. Purchase from the brand’s official website, authorized dealers, or well-known retailers.
  • Look for certification. A certified filter ensures you’re getting a product that meets specific standards.


Navigating the world of home water filtration systems can initially seem daunting, but with the right knowledge, it can be a straightforward journey. By understanding your specific needs and researching filtration types, you not only guarantee clean water for your household but also contribute to a more sustainable and eco-friendly world. 


What should you look for when buying a water filter?

When buying a water filter, consider your specific water quality needs, the filter’s certification, its lifespan, ease of maintenance, and the types of contaminants it can remove. Also, factor in installation requirements and costs.

What type of filter is best for drinking water?

For drinking water, a reverse osmosis filter combined with an activated carbon filter is often considered the best. This combination can remove a wide range of contaminants, including heavy metals, chlorine, and organic compounds.

Which water filter removes the most contaminants?

Reverse osmosis filtration systems, especially those combined with other filtration methods like activated carbon or UV purification, tend to remove the most contaminants, ranging from heavy metals to bacteria and viruses.

How do I know what water filter size I need?

The size of the water filter you need depends on your household’s daily water consumption and where you intend to install it. For whole-house systems, consider the number of bathrooms and people in the home. For under-sink or faucet filters, think about your daily drinking and cooking water needs. Always refer to the manufacturer’s guidelines for specific sizing recommendations.

Are you curious about water filters? Take a deeper look into their importance for keeping a dependable water supply, along with these extra insights:

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