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The Best Countertop Water Filters of 2021

Countertop Water Filter Overview

There are many ways to filter contaminants from your tap water but a countertop drinking water filter system is the best choice if you can’t install or don’t want to install a more complicated system.

The Best Countertop Water Filters from RO-System.org

We’ve researched this list of the best countertop water filter systems so that you can still have the purest tap water no matter where you are.

Why would you want a countertop water filter?

  • If you rent your apartment or home, you may not be allowed to install a more complex water filter system like an undersink water filter or whole house water filter.
  • If you are living some place temporarily, staying in a hotel, or travelling, a water filter that needs installation is not practical.
  • If you want filtered water on demand in your bedroom, bathroom, or office, there may not be plumbing or a faucet available (nearby) to connect a system to.
  • In an emergency, you may not have running water or electricity but you will still need lots of clean, filtered water that is free from contaminants.
  • You don’t want the cost or waste associated with bottled water.

We have researched all of the options and created this list of the best countertop water filter reviews in the following categories:

  • Reverse osmosis water filters that only need power to operate
  • Reverse osmosis water filters that connect to a faucet and don’t need power
  • Berkey gravity water filters that don’t need a faucet or power

Countertop Reverse Osmosis Water Filters with Electric Installation

The following countertop filtration systems are super easy to install since you only need to plug them in. There is no plumbing connection needed.

You add water by filling a reservoir in the system and then take your drinking water on demand, one glass at a time.

Wastewater containing concentrated contaminants is manually dumped as needed.

While these systems are not cheapest, they provide multiple stages of filtration including reverse osmosis (RO), which is the most effective and complete water filter technology according to the Environmental Working Group.

If you want the cleanest possible drinking water and the least effort to install the system, then these are the best countertop water filter options.

ON SALE NOW!
Frizzlife Countertop Reverse Osmosis Water Filtration System
AlcaPure Reverse Osmosis Countertop Water Filter by RKIN with Patented High Capacity 4 Stage Technology: Purified Alkaline Water with Superior Taste. No Installation or Assembly Required. Space Black
AquaTru - Countertop Water Filtration Purification System with Exclusive 4-Stage Ultra Reverse Osmosis Technology (No Plumbing or Installation Required) | BPA Free
SimPure Y5 Countertop Water Filtration System, Reverse Osmosis Water Filter (Gray)
Stages
4
4
4
3
Capacity
0.8 Gallon / 3 Liter
1 Gallon / 3.8 Liter
1 Gallon / 3.8 Liter
1.3 Gallon / 5 Liter
Reverse Osmosis
Alkaline
Water Temp
Room
Room
Room
Room/Warm/Hot
Installation
Electricity Only
Electricity Only
Electricity Only
Electricity Only
Free Shipping
ON SALE NOW!
Frizzlife Countertop Reverse Osmosis Water Filtration System
Stages
4
Capacity
0.8 Gallon / 3 Liter
Reverse Osmosis
Alkaline
Water Temp
Room
Installation
Electricity Only
Our Review
Free Shipping
More Info
AlcaPure Reverse Osmosis Countertop Water Filter by RKIN with Patented High Capacity 4 Stage Technology: Purified Alkaline Water with Superior Taste. No Installation or Assembly Required. Space Black
Stages
4
Capacity
1 Gallon / 3.8 Liter
Reverse Osmosis
Alkaline
Water Temp
Room
Installation
Electricity Only
Our Review
Free Shipping
More Info
AquaTru - Countertop Water Filtration Purification System with Exclusive 4-Stage Ultra Reverse Osmosis Technology (No Plumbing or Installation Required) | BPA Free
Stages
4
Capacity
1 Gallon / 3.8 Liter
Reverse Osmosis
Alkaline
Water Temp
Room
Installation
Electricity Only
Our Review
Free Shipping
More Info
SimPure Y5 Countertop Water Filtration System, Reverse Osmosis Water Filter (Gray)
Stages
3
Capacity
1.3 Gallon / 5 Liter
Reverse Osmosis
Alkaline
Water Temp
Room/Warm/Hot
Installation
Electricity Only
Our Review
Free Shipping
More Info

Frizzlife Countertop Reverse Osmosis Water Filtration System

Frizzlife WA99 Reverse Osmosis Countertop Water Filter

This four-stage RO countertop water filter removes up to 99.99% of over 1,000 contaminants, including lead, chlorine, fluoride, heavy metals, mercury, chloramine, chromium, arsenic, and radium.

The Frizzlife achieves a very good 5:1 ratio of filtered water to wastewater. The smart design incorporates a circular filtration system that re-filters the water as much as possible before an indicator lets you know to dump the wastewater. Waste water containing the filtered contaminants is a normal part of the RO process.

Another great feature of this system is the integrated TDS meter. At all times, you know the TDS level of the water going into the system and of the clean water coming out. TDS (or “Total Dissolved Solids”) is used as a general guide to how “pure” water is. 100% pure water would have a TDS of zero.

The system will also show you the age and status of each of the four filter cartridges, so you know when the filters need to be replaced.

Speaking of filters, they are easy to replace with a simple twist of the included tool when indicated by the system. 

Combine these great features with a decent purchase price and replacement filter cost, and it’s obvious why this is a popular and well-rated system.

Frizzlife Pros

  • Includes RO filter
  • Low waste water
  • TDS meter reports on drinking water quality
  • Filter life indicators

Frizzlife Cons

  • Takes a lot of space on small counters

For more details on this system, check out our full Frizzlife WA99 reverse osmosis review or click the button below.

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AlcaPure Countertop Reverse Osmosis Water Filter

The AlcaPure is another four-stage countertop water filter system that will remove up to 99% or more of over 1,000 contaminants, including lead, chlorine, fluoride, heavy metals, mercury, chloramine, chromium, arsenic, and radium.

The biggest unique benefit of this system is that has an alkaline water remineralization stage.  Since reverse osmosis removes all particles of a certain size, that includes natural minerals (such as calcium and magnesium) that some people consider beneficial.

By adding calcium and magnesium back to the filtered water, the pH is raised into the 7-8 range and the water becomes more alkaline. Alkaline mineral water has more of a “mineral water taste” that many people prefer.

This system uses a very low 30W of power and has a 1:1 ratio of filtered to wastewater.

Also available in white and a non-alkaline version, the AlcaPure gets many good online reviews.

Alcapure Pros

  • Alkaline water remineralization stage
  • Includes RO filter
  • Low power consumption

Alcapure Cons

  • 1:1 waste water ratio is good but could be better
More Info on Amazon

Grow your vegetables inside!

AQUA TRU Countertop Water Filtration Purification System

With a good overall rating and great comments about water filter speed, this system is worth checking out.

In fact, this system is endorsed and recommended by Erin Brockovich – the clean water advocate who had a movie made about her landmark lawsuit over hexavalent chromium water contamination.

The AQUA TRU has four stage filtration including the reverse osmosis membrane, capable of removing thousands of contaminants – 15x more than standard pitcher filters.

Quick change twist filters last from 6 months to 2 years and are easy to replace.

An integrated digital display let’s you know when it’s time to change filters.

Aqua Tru Pros

  • Filter life indicators
  • Certified to NSF standards by IAPMO
  • Endorsed by the real Erin Brockovich

Aqua Tru Cons

  • Some past reports of reliability issues but the one year warranty covers any issues
More Info on Amazon

SimPure Countertop Reverse Osmosis Water Filtration System

Since it is fairly new, the SimPure countertop water filter does not have as many reviews as the other systems above, but it does have one very special feature that makes it stand out…

With Instant Heat, you can dispense pure, clean water at any of these temperatures on demand:

  • Room temperature
  • 113 F / 45 C (Warm milk)
  • 185 F/ 85 C (Coffee)
  • 198 F / 92 C (Tea)

So instead of just being a countertop water filtration system, the SimPure is also an electric hot water kettle!

Three filter stages including reverse osmosis remove 99% of contaminants and harmful substances from your drinking water.

A 5 Liter (1.3 gallon) holding tank is the largest of our recommended electric systems.

Integrated LED indicators let you know the status of the filters and when they need to be changed. When it is time to change filters, they are easy to remove and replace.

If you want the convenience of a countertop RO drinking water filter and on-demand water heater, then you should definitely check out the SimPure.

Simpure Pros

  • Integrated hot water kettle with selectable drinking water temperature
  • Largest holding tank of recommended electric countertop water filters
  • Filter life indicators

SimPure Cons

  • Fairly large
More Info on Amazon

Countertop Reverse Osmosis Water Filters with Plumbing Installation

Our next batch of recommended countertop water filters differ from the systems above in two ways:

  • They require no electricity
  • They connect to a faucet or to the undersink plumbing

If you want or need more filtered water volume than with the electric systems above, then check out the faucet filters below. They remove just as many contaminants but with much higher gallon per day output.

Also, since they do not require electricity, a faucet filter is less expensive than the electric systems.

APEC Water Systems RO-CTOP-C Portable Countertop Reverse Osmosis Water Filter System with Case, Installation-Free, Fits Most Standard Faucet
Countertop Portable Universal 5-Stage Reverse Osmosis RO Purification Water System with DI Deionizing Mixed Bed (Close to 0 PPM) postfilter, Build in USA
Express Water EZRO5 Countertop Reverse Osmosis Water Filtration System, Simple Set Up Faucet Filter, White
Stages
5
4
5
4
Capacity
80 oz Pitcher
90 Gallons per Day
75 Gallons per Day
75 Gallons per Day
Reverse Osmosis
Alkaline
Water Temp
Faucet or Refrigerator
Faucet
Faucet
Faucet
Installation
Hoses to undersink plumbing
Faucet Only
Faucet Only
Faucet Only
Free Shipping
-
Stages
5
Capacity
80 oz Pitcher
Reverse Osmosis
Alkaline
Water Temp
Faucet or Refrigerator
Installation
Hoses to undersink plumbing
Our Review
Free Shipping
More Info
APEC Water Systems RO-CTOP-C Portable Countertop Reverse Osmosis Water Filter System with Case, Installation-Free, Fits Most Standard Faucet
Stages
4
Capacity
90 Gallons per Day
Reverse Osmosis
Alkaline
Water Temp
Faucet
Installation
Faucet Only
Our Review
Free Shipping
More Info
Countertop Portable Universal 5-Stage Reverse Osmosis RO Purification Water System with DI Deionizing Mixed Bed (Close to 0 PPM) postfilter, Build in USA
Stages
5
Capacity
75 Gallons per Day
Reverse Osmosis
Alkaline
Water Temp
Faucet
Installation
Faucet Only
Our Review
Free Shipping
-
More Info
Express Water EZRO5 Countertop Reverse Osmosis Water Filtration System, Simple Set Up Faucet Filter, White
Stages
4
Capacity
75 Gallons per Day
Reverse Osmosis
Alkaline
Water Temp
Faucet
Installation
Faucet Only
Our Review
Free Shipping
More Info

Because of their connections, these countertop RO water filters must be placed next to a sink. If installed in the kitchen, they will filter enough water for both cooking and drinking without the hassle of manually filling a reservoir.

For those that attach directly to the faucet, the sink must have a “standard” aerator faucet head that the system can connect to. If you have a “sprayer” style kitchen sink faucet head or anything else that is unique, you won’t be able to connect this type of filtration system.

Fortunately, faucet filters can easily connect to a kitchen faucet or bathroom faucet once you remove the aerator.

Aerator faucet connection

Waterdrop M5 Countertop Reverse Osmosis System with Portable Water Pitcher

This countertop system from Waterdrop is unique in that it requires a connection to the undersink plumbing for fresh and wastewater, but it does not interfere with the faucet like the comparable systems here. If you have a designer kitchen faucet, then this may be a good option for you.

With an all-in-one 5-stage filter and a quiet, non-electric pump, you get 12 months or 550 gallons of water between filter replacements, which only take 3 seconds!

The 80oz BPA-free pitcher is removable, so you can keep it in the fridge or move it to wherever you want clean water. When you return the pitcher to the base, the system will automatically filter water until the pitcher is full again.

Consisting of two layers of sediment membrane, a premium carbon block, the RO membrane, and post-activated carbon block layer, the filter can remove over 1,000 harmful contaminants, including but not limited to chlorine, lead, taste and odor, sand, rust, particulates, TDS and other heavy metals.

Note that it is suggested to drill a hole in your counter to run the necessary hoses from this system to the undersink plumbing.

Waterdrop Pros

  • RO filtered water with an integrated pitcher
  • Connects to plumbing under sink so it refills automatically
  • Long lasting 12 month filter

Waterdrop Cons

  • Connects to water line under sink, which may require a new hole in the countertop

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APEC RO-CTOP-C Countertop Reverse Osmosis Water Filter System

The APEC RO-CTOP countertop water filter has four of the same filters you would find in an undersink RO system, but conveniently connects to your faucet instead.

Because of the faucet connection, this system travels well when you want to bring it with you.

The faucet adapter has a clever design that allows you to switch between sending water to the RO system or normally through the kitchen faucet. It also contains the wastewater tube, so that wastewater containing contaminants can flow down the sink drain as the RO membrane works.

Not only does this system have a surprisingly large maximum output of 90 gallons per day (GPD), it is also highly efficient. For every gallon of clean water produced, only 2 gallons are wasted for flushing the RO membrane. This is lower than the average of 3 gallons of water wasted with other systems.

A clean and sleek metal case covers the filters, which makes it less obvious on the counter.

Read our full review of the APEC CTOP-C.

APEC Pros

  • RO water filter with only a faucet connection
  • Sleek cover hides filters inside
  • High 90 gallons of water per day output

APEC Cons

  • Doesn’t work with all faucet types
  • Filter changes are not as fast as other countertop water filters
More Info on Amazon

This system is also available in the RO-CTOP-PH version which adds an alkaline water remineralization stage for water that has a higher pH and more of a “mineral water” taste.

More Info on Amazon

Reverse Osmosis Revolution Countertop Reverse Osmosis System

This countertop water filter system from Reverse Osmosis Revolution is like the APEC system above with a few notable differences.

First, it has 5 water filter stages to remove contaminants instead of 4.

Second, there is no case around the filtration system, which makes it a lot less attractive on the counter.

Third, the wastewater ratio is higher at 2.8 gallons of waste per 1 gallon of purified water. Wastewater is normal with a RO filtration system but if you have to pay for your tap water, you may want something more efficient.

The one big benefit is that it is quite a bit cheaper than the APEC filter system and still gets good reviews.

All input and output hoses connect to the faucet adapter making it easy to choose between using filtered water or unfiltered water from a single kitchen sink faucet.

Because of the faucet connection, this system travels well when you want to bring it with you.

Reverse Osmosis Revolution Pros

  • Not expensive
  • Faucet adapter makes it easy to switch water sources

Reverse Osmosis Revolution Cons

  • You may not be a fan of seeing all of the filters without a case
More Info on Amazon

Express Water Countertop Reverse Osmosis Water Filtration System

Comparable to the two systems above, this countertop water filter system from Express water requires you to connect an adapter to a standard faucet and then select whether water comes out of the faucet normally or goes to the water filters.

Four filters (including the RO membrane) work to remove 99.9% chemicals and contaminants.

The big difference with this machine is that instead of the clean water coming out of a faucet adapter, this system has a dedicated filtered water faucet attached to the countertop filter.

If you don’t want an adapter on your bathroom or kitchen faucet, this may be a good choice for you.

This is the same kind of faucet you would expect to get with an undersink water filtration system you have to install. Depending on your needs, this may make dispensing the water more convenient.

This is another countertop water filtration system without a case around the filtration system, so it is not as attractive as one with a case, such as the APEC system.

Because of the faucet connection, this system travels well when you want to bring it with you.

It still gets good reviews and is an excellent way to get filtered water with very minimal installation.

Express Water Pros

  • Integrated faucet keeps drinking water separate from the sink faucet
  • A very portable water filter

Express Water Cons

  • Partial case around filters makes it rather unattractive
More Info on Amazon

Berkey Water Filters with Zero Installation

If you are looking for the ultimate in convenience of a countertop water filter system that truly needs no installation, then you may be interested in a gravity-fed or Berkey water filter.

Berkey drinking water filters don’t require any power, plumbing, faucet, or installation. You simply set it anywhere you want, pour contaminated water in the top, and then draw clean water from the bottom.

Berkey water filters work by using gravity to pull water down through the filter stages, much like how rain water filters down through the ground into wells.

While not as good at removing contaminants in your water as reverse osmosis, the filters in a Berkey water filter do a good job of removing some of the most common water problems, including: bacteria, viruses, parasites, heavy metals, pharmaceuticals, PFOAs, chlorine, herbicides, pesticides, and radiological elements.

Because these countertop filters remove viruses, bacteria, and protozoa found in natural water, Berkey filters are great for travel, outdoor activities, or during unexpected emergencies when tap water and bottled water are not available.

Berkey countertop water filters vary in the volume of water they hold and in the number of filters they contain, making some of them very portable water filters.

Big Berkey BK4X2 Countertop Water Filter System with 2 Black Berkey Elements and 2 Fluoride Filters
IMP6X2-BB Imperial Berkey with 2 Black Filters and 2 Flouride Filters
TRAVEL BERKEY WATER FILTER WITH 2 BLACK BERKEY FILTERS AND 2 PF2 FLUORIDE FILTERS
Stages
2
2
2
Capacity
2.25 Gallon
4.5 Gallon
1.5 Gallon
Reverse Osmosis
Alkaline
Water Temp
Room
Room
Room
Installation
None
None
None
Prime Shipping
-
Big Berkey BK4X2 Countertop Water Filter System with 2 Black Berkey Elements and 2 Fluoride Filters
Stages
2
Capacity
2.25 Gallon
Reverse Osmosis
Alkaline
Water Temp
Room
Installation
None
Our Review
Prime Shipping
More Info
IMP6X2-BB Imperial Berkey with 2 Black Filters and 2 Flouride Filters
Stages
2
Capacity
4.5 Gallon
Reverse Osmosis
Alkaline
Water Temp
Room
Installation
None
Our Review
Prime Shipping
-
More Info
TRAVEL BERKEY WATER FILTER WITH 2 BLACK BERKEY FILTERS AND 2 PF2 FLUORIDE FILTERS
Stages
2
Capacity
1.5 Gallon
Reverse Osmosis
Alkaline
Water Temp
Room
Installation
None
Our Review
Prime Shipping
More Info

Big Berkey Water Filter

The Big Berkey countertop water filter holds 2.25 gallons of purified water and is designed for small and medium sized families (1-4 people).

The housing is made of high grade 304 stainless steel and is easy to clean.

The dimensions are 21″ high and 8.5″ wide and it filters approximately 3.5 gallons of water per hour.

This countertop water filtration system comes with two “black Berkey filters” that remove the bulk of contaminants and two fluoride water filters that remove 95% or more of fluoride. The system can be upgraded to four of each filter if you want to double the filter speed.

A “black Berkey” filter is their version of carbon filters found in most other countertop water filters.

Berkey Pros

  • True “zero installation” makes is very convenient to use anywhere
  • Large capacity
  • Looks good on the counter

Berkey Cons

  • Water filters and fluoride filters are gravity fed and take some time
More Info on Amazon

Countertop Water Filter Buyer’s Guide

Our countertop water filter reviews above can’t say for sure which system is the best countertop water filter for you, but they do narrow the list of choices down to a few high quality options.

Depending on your water consumption, the contaminants in your water (as shown in a water test), and your preferences, you will find a great countertop water filter here on this page.

If you need more help, here is some information to help you pick the best countertop filtration system for you.

What is a countertop water filter?

A countertop water filter is exactly what it sounds like: a water filtration system that sits on your counter top. Like any other drinking water filtration system, countertop water filters remove the contaminants in your tap water so you end up with clean water.

Countertop filters are generally easy to install since they don’t usually have permanent connections to your water source.

The benefits of clean drinking water

Regardless of whether you have well water or municipal water, you want your tap water to be safe, healthy drinking water.

Unfortunately, this is not always the case and water quality can vary. Even bottled water can have a questionable water source and inadequate filters used to remove harmful contaminants.

Common tap water contaminants

Depending on your water source, the contaminants you should filter from your water can include:

  • Aluminum
  • Ammonium
  • Arsenic 5
  • Bacteria
  • Barium
  • Cadmium
  • Calcium
  • Chloride
  • Chlorine
  • Chloramines
  • Chromate
  • Chromium
  • Copper
  • Cyanide
  • Cysts
  • Fluoride
  • Heavy metals
  • Iron
  • Lead
  • Magnesium
  • Manganese
  • Mercury
  • Nitrate
  • Nitrite
  • Pesticides
  • Phosphate
  • Potassium
  • Protozoa such as Cryptosporidium and Giardia
  • Radium
  • Radon
  • Selenium
  • Silver
  • Sodium
  • Strontium
  • Sulfate
  • Sulfite
  • Turbidity
  • Viruses
  • Volatile organic compounds (VOCs)
  • Zinc

… and many more!

Any countertop drinking water filter will remove at least some of these contaminants from your water.

There are many long term health benefits to drinking clean water and avoiding the negative health effects of known harmful chemicals.

Countertop water filters with reverse osmosis or distillation will be the most effective water purification methods for your tap water. Make sure you have your water tested since the best countertop water filter for you may be different that someone else with a different water supply.

Other types of countertop water filters

Besides the best countertop water filters listed above, what are the other types of countertop water filters out there?

Water filter pitchers

A water filter pitcher is a simple countertop filter device you fill with tap water that is gravity fed through activated carbon filters. Water filter pitchers hold a limited amount of water but can be kept anywhere, including the refrigerator.

The activated carbon filter in a water filter pitcher is effective at removing heavy metals, pesticides/herbicides, volatile organic compounds, chlorine (common in municipal water sources), and other contaminants.

The best countertop water filters are a better choice than water pitcher filters because they are usually a multi stage water filter system with other methods of water filtration along with an activated carbon filter.

We don’t recommend a water filter pitcher when there are so many better countertop filters available.

Water distiller

A countertop water distiller is a type of countertop filter that distills water.

Water distillation is the process of boiling water and collecting the steam. When water is boiled into steam, it leaves behind everything else and you are left with pure water and no contaminants.

While a countertop water distiller will clean your water very effectively, there are drawbacks.

A countertop water distiller is much less efficient than other countertop water filters and it can take hours to produce one gallon of pure water. As a drinking water filter, this may be acceptable, but if you plan to cook or use the water for anything else, make sure you consider this.

Other types of water filters

The following water filter types are NOT for the countertop, but are still water filters that will remove contaminants in your water as well or better than a countertop water filtration system.

Undersink water filters

An under sink water filtration system is designed to be installed under a sink – usually the kitchen sink.

This kind of drinking water filter has a permanent connection to your water supply for tap water, and to the drain pipe to dispose of waste water and contaminants.

Our recommended under sink filters will often include reverse osmosis filtration technology, considered to be the best mix of features, filtering, and output.

Whole house water filters

If you are a homeowner or renter that can make major upgrades, a whole house water filter works to remove contaminants at the point where your water supply enters your home.

Because of this, ALL of your water is filtered before it goes to any of your fixtures including sinks, showers, tubs, laundry, or toilets.

If you have problems with hard water, iron, or bacteria, then a whole house water filer is the best way to filter all of your water.

How to choose countertop water filters

What is reverse osmosis?

When you want the best possible filtration, we recommend a RO countertop water filter.

Reverse osmosis water filtration (RO) is a process in which tap water is forced through a very fine filter membrane to remove nearly all contaminants.

RO water filters are designed to remove as much as 99% of all sediment, chemicals, colors, and odors from your tap water.

You can learn much more about RO water filtration and how it works on our best reverse osmosis filter systems page.

Many of our recommended countertop models include an RO water filter stage.

What is alkaline water remineralization?

You can get alkaline water containing natural calcium and magnesium from systems with an alkaline remineralization stage.

The term “alkaline water” comes from the pH level of the water. Water with a higher pH is considered alkaline water and is considered by many to be better for the human body.

“Acidic water” has a lower pH and because water filters (especially a reverse osmosis filter) remove naturally occurring beneficial minerals like calcium and magnesium along with the contaminants in your water, the pH is lowered.

Remineralization is an uncommon feature for a countertop drinking water filter, but a few of of our recommendations do include it.

Drinking water output

Countertop water filters are often classified by both how they filter drinking water and how many gallons of water they can process in a day.

Some water filters are more efficient at removing contaminants as other.

If you want to install a countertop water filter for a lot of people, cooking, or another activity that requires lots of clean water, make sure you pick a countertop filter that will meet your output needs.

Replacement filters

Any countertop water filter is only as good as the water filter cartridges it uses to process your drinking water.

Over time, the water filter(s) in the system collect too many contaminants to be effective anymore. When this happens, the filters will need to be replaced.

Each water filter in a system has a different purpose and often have a different recommended replacement schedule from the manufacturer, based on average water conditions.

If your water supply is very high in any one or more contaminants, you may have to change the water filters more often than recommended. You may also need a multi stage water filter system to ensure your drinking water is clean and the filters last.

Be sure to have your water tested if you are unsure about which countertop filters will work best.

Overall, all of these recommended water filtration systems are require very low maintenance.

NSF International Certification

NSF International provides NSF/ANSI certification for manufacturers that want to prove that their water filtration system complies with the technical requirements of the standard, usually for removal of specific contaminants.

For the water filter manufacturer, this is a long and expensive process (which is why more countertop filter systems are not NSF certified). The system must be initially reviewed, tested to comply with the published standard, and approved. Then, there will be follow up inspections and testing in the future to ensure all compliance items are still met.

Water Quality Association (WQA) Certification

WQA (the Water Quality Association) provides certified listings that prove products have been tested and approved to comply with their stated claims.

Many water filter systems will have this certification to prove that contaminants are removed as claimed by the manufacturer.

Will a countertop drinking water filter remove all contaminants from my drinking water?

Unfortunately, no countertop water filter is 100% effective.

Water distillers come close but they are exceptionally slow and very low output.

Reverse osmosis filters are designed to remove almost all contaminants and are considered by most to be the best water filter technology. In addition, all of our best countertop water filter recommendations include RO as one of several water filter stages in the system.

Is a countertop water filter better than bottled water?

Bottled water may come from any source (including a municipal water supplier) but should always be filtered before it is bottled.

Despite this, bottled water can still contain chlorine, fluoride, or other contaminants.

Plus, there is the effort to buy and transport bottled water and dispose of the empty plastic bottles, which is an environmental concern.

While the upfront cost of a countertop water filter may seem high, if you calculate how many water bottles you buy in a year compared to the long term total cost to own and maintain a countertop drinking water filter, you will find that having the filter is cheaper and easier.

What about non-RO countertop drinking water filters?

Most of our recommended best countertop water filters include reverse osmosis as one of the filter stages.

This is because RO is the most effective and efficient method to filter contaminants out of water.

There are other countertop water filters that only contain the same, basic activated carbon filter as a water filter pitcher. While this is an improvement over regular tap water, we don’t think it is enough.

If you spend a little more on a system with RO, you will get cleaner, safer drinking water.

How to install a countertop water filter?

Based on the categories of countertop water filters above, the installation process will vary.

The important thing to remember is that most countertop water filters are easy to install.

Since you set these systems out on your kitchen counter or other counter, they have only one of two connection types:

  • Electrical
  • Faucet

Any countertop water filter you buy will include easy installation instructions to get it up and running.

Make sure you keep the instructions so you know how to change the water filters when it is time. You may also want to set a calendar reminder for when the manufacturer recommends filter replacement.

Systems that connect to the faucet will need to have adequate water pressure to process water efficiently.

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