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Top 5 Water Filters That Remove Arsenic: Smart Choices (January 2024)

water filters that remove arsenic

Finding the right water filter to remove arsenic is challenging, but with expert guidance, you will find your match!

We have tested numerous water filters that remove arsenic to pick out the best 5. Know everything about them below: 

5 Best Arsenic Water Filters In 2024: Quick Cheat Sheet

Best Under-Sink: Clearly Filtered #1

Best Under-Sink: Clearly Filtered 

  • Arsenic Reduction Rate: 98.3%
  • Lifespan: 15 months
  • Filtration Capacity: 2000 gallons
  • Certifications: NSF 42, 53, 244, 401, P473
  • Warranty: Lifetime
See Offer PriceRead Full Review
Runners-Up Under-Sink RO: Aquasana OptimH2O#2

Runners-Up Under-Sink RO: Aquasana OptimH2O

  • Arsenic Reduction Rate: 97%
  • Lifespan: 6 months – 1 year
  • Filtration Capacity: 13.32 GPD (Gallons Per Day)
  • Certifications: NSF 42, 53, 58, 401, P473
  • Warranty: 2 years
See Offer PriceRead Full Review
Best Water Pitcher: ZeroWater® ZD-013-D#3

Best Water Pitcher: ZeroWater® ZD-013-D

  • Arsenic Reduction Rate: 99.7%
  • Lifespan: 1 month
  • Filtration Capacity: 40 Gallons 
  • Certifications: NSF 42, 53
  • Warranty: 30 days on the filter cartridge and 90 days on other parts
See OfferRead Full Review
Best Countertop RO: Aquatru#4

Best Countertop RO: Aquatru

  • Arsenic Reduction Rate: Arsenic 5 (>98%), Arsenic 3 (50-80%)
  • Lifespan: 6 months – 2 years
  • Filtration Capacity: 600 – 1,200 gallons (~1 GPM)
  • Certifications: NSF 42, 53, 58, 401 & P473
  • Warranty: 1 year
See Offer PriceRead Full Review
Best Whole House RO: Crystal Quest#5

Best Whole House RO: Crystal Quest

  • Arsenic Reduction Rate: Up to 99%
  • Lifespan: 15 – 20 years
  • Filtration Capacity: 50 GPD
  • Certifications: ISO-certified components
  • Warranty: 1-year
See Offer PriceRead Full Review
Here's How We Test Products At Aquaprofessor

Top 5 Arsenic Water Filters: Detailed Analysis

Arsenic is one of the most commonly found contaminants in drinking water and can pose serious health risks upon consumption. Arsenic is a known carcinogen that also interferes with the production of red blood cells and can cause several harmful effects like nausea, vomiting, diarrhea, cramping, dehydration, electrolyte imbalance, and kidney failure. 

Solution? Water filters. What kind of water filters? Keep reading to get the answers.

Products Removal Rate Process Used+Certification Filter LifespanTotal Contaminants Removed
Clearly Filtered94.3%Mechanical + Carbon + Ion Exchange
NSF 42, 53 & 401
2,000 gal.232+
Aquasana OptimH2O97%Mechanical + Carbon + RO + Remineralizer
NSF 42, 53, 58, 401, P473
13.32 GPD88+
ZeroWater®Carbon + Ion Exchange + Membrane
NSF 42 and 53
40 gallons23+
AquaTruArsenic 5 (>98%), Arsenic 3 (50%-80%)Mechanical + RO + Carbon
NSF 42, 53, 58, 401, and P473
600 – 1,200 gallons83+
Crystal Quest99%Carbon + Ion Exchange
ISO-certified components
750,000 or 1,000,000 gallons10+

Let’s look at all 5 arsenic water filters one by one in depth in the following sections: 

Best Water Filter That Removes Arsenic: Clearly Filtered Under Sink

clearly filtered under sink
Adarsh P/ Aqua Professor

Clearly Filtered under-sink water filters with advanced RO technology and a 3-stage filtration process are recommended for arsenic removal along with 232+ contaminants.

Arsenic Reduction Rate

Cleared Filtered has an impressive 94.3% arsenic reduction rate. Its dedicated arsenic filter can eliminate both types of Arsenic (As III and V) from the supplied water. 


The lifespan of the Clearly Filtered POU filter depends on the amount of water filtered. They can last 2000 gallons of water, almost equivalent to 15 months (1.3 years). After this limit is exhausted, these filters have to be replaced by new ones to avoid leakage of impurities in drinking water. The lifespan may also vary depending on the water quality of your main supply.   

Filtration Capacity 

As indicated earlier, Clearly Filtered under-sink filters can clean upto 2000 gallons of water before needing a replacement. It has 3 filtration stages – a granulated coconut carbon filter, a special blend filter, and a dedicated filter for arsenic and fluoride removal. 

This filter can remove upto 99.5% of impurities when connected to the main water supply below the kitchen sink. So, whenever you open the faucet, you get clean water. 


Clearly Filtered has passed the rigorous independent testing procedure to verify against NSF 43, 53, and 401 certifications to prove its efficiency at removing arsenic from drinking water. You can check the certification details on their official website before purchasing. 


Clearly Filtered company offers a limited lifetime warranty to all its customers. So, make sure you buy from their official website and read the terms and conditions to avail of this offer.

Clearly Filtered: Pros and Cons


  • Removes 232+ contaminants
  • Zero wastage of water
  • Dedicated filter stage for arsenic
  • Easy filter replacement
  • NSF-certified
  • Lifetime warranty


  • Unable to remove microorganisms. 
  • Bit more expensive than other under-sink filters.
Also Read: SimPure Y7 RO + UV Countertop Review

Undersink RO That Removes Arsenic: Aquasana OptimH2O

aquasana optimH2O
Adarsh P/ Aqua Professor

Aquasana OptimH2O under-sink reverse osmosis system is NSF-certified to remove 88+ contaminants, including arsenic, and provides clean and great-tasting water for drinking and cooking. 

Arsenic Reduction Rate

The arsenic reduction rate of Aquasana OptimH2O is 97% on testing. Out of the four filters present, the catalytic carbon filter and RO membrane are the two main departments responsible for this successful reduction of arsenic. 


The lifespan of its pre-filter and Claryum filter is – 6 months and for RO membrane and remineralizer is 1 year.

The lifespan of the water filter system may vary depending on your needs and water quality. If your water’s sediment levels are high, you may need to change the pre-filter more frequently. The quality of filtered water tells a lot about the health of your filters, so don’t ignore the signs for replacement. 

If the overall system is adequately maintained and the filters are replaced timely, it can easily last for a decade

Filtration Capacity

Aquasana OptimH2O can produce 13.32 gallons of clean water every day. It can reduce 95% of total dissolved solids from contaminated water. The four stages of filtration can remove more than 88 contaminants, including fluoride, lead, asbestos, chlorine, and arsenic.


The performance of the OptimH2O has been tested and certified by NSF to standards 42, 53, 58, and 401. These certifications prove that this filter can remove substances like chlorine, heavy metals, pharmaceuticals, bad taste, and odors. In addition, the filter elements are also upto to the safety standards.  


OptimH2O offers a 2-year warranty and a 90-day satisfaction guarantee for all purchases from their official website. Read the terms and conditions to avail full benefits.

Note that the warranty gets null and void if you install the system yourself. 

Aquasana OptimH2O: Pros and Cons


  • Removes 88+ contaminants
  • Good Filtration speed 
  • Easy replacement
  • 4-stage filtration
  • NSF-certified
  • 90-day satisfaction guarantee + 2-year warranty


  • Costly to replace all 4 filters
  • Professional help required for installation
  • Complaints regarding irregular water pressure

Water Filter Pitcher That Removes Arsenic: ZeroWater® ZD-013-D

zerowater pitcher
Adarsh P/ Aqua Professor

ZeroWater 8-cup water pitcher is a certified portable water filter that gives good competition to many expensive filtration systems in terms of water quality through its 5-stage cleaning process.

Arsenic Reduction Rate

ZeroWater pitchers have an excellent arsenic reduction rate of 99.7%, which outperforms various large filtration systems through its combined multi-stage filter cartridge.


A filter cartridge of ZeroWater usually serves up to 40 gallons of clean filtered water before it requires replacement. However, how quickly you will exhaust 40 gallons of water depends on your usage and the number of consumers that use the filter (approx. 1 month). Thus, you may need to change the filter accordingly. 

Filtration Capacity 

Don’t get fooled by the size, as this small water pitcher filter has a 5-stage filtration process to supply clean and healthy drinking water. It can remove upto 99.7% of arsenic and dissolved solids. 


ZeroWater has been independently tested and certified by NSF for standards 42 (chlorine, taste, and odor) and 53 (lead, chromium, and mercury). Additionally, it is one of the few water pitcher filters that can remove PFOA and PFOS from water. 


ZeroWater offers a limited warranty on the filter cartridge and pitcher parts. In case of manufacturing defects, you get a 90-day warranty on the dispenser, pitcher, travel bottle, or TDS meter. Plus, 30 days warranty is given from the date of purchase on defective filter cartridges. So, ensure that you inform the company in time to get the replacements. 

Zerowater Pitcher: Pros and Cons


  • Removes 99.7% TDS
  • NSF-certified for lead and chromium reduction 
  • Indicator lights
  • Lightweight and space-saving design
  • Transparent plastic body design


  • Limited capacity
  • Cannot handle highly contaminated water
  • Requires frequent replacements

Countertop Water Filters That Remove Arsenic: Aquatru RO

aquatru countertop RO
Adarsh P/ Aqua Professor

AquaTru, a well-known brand, manufactures high-quality countertop reverse osmosis water filters with 4 stages of filtration that can remove upto 99% of total dissolved solids, including arsenic. 

Arsenic Reduction Rate

AquaTru countertop RO filters are good at eliminating arsenic of both types from your water, but the reduction rates differ. For example, it can reduce Arsenic V (As5+) by 98% and Arsenic III (As3+) by 50 to 80%. That’s because Arsenic III is usually harder to remove than Arsenic V from water.


AquaTru contains a pre-filter, reverse osmosis filter membrane, and carbon filter, which you must replace once their lifespan is over. By over, we mean worn-out and unfit for filtration anymore. 

It’s best to replace pre-filters every 6 months, RO (semi-permeable) membrane every 2 years, and the activated carbon filter every year. You should record the filter change dates, as these replacements are necessary to maintain good-quality water. 

Filtration Capacity 

Due to its compact size and no attachment to the main water pipeline, the AquaTru countertop RO filter has a limited filtration capacity of 1 gallon at a time. It means that it filters water batch-wise.

So you have to fill it with 1 gallon of water, which, when filtered and consumed, can be filled up again with contaminated water and switched on. It hardly takes 15 minutes to filter a full water holding tank. 

Water undergoes a 4-stage filtration process in an AquaTru filter before it is available for drinking. The pre-filter, coconut-shell carbon block filter and reverse osmosis technology remove maximum contaminants from your dirty water, including arsenic.  


You can rest assured about the filtration efficiency of this AquaTru filter as it is independently tested to NSF standards 42, 53, 58, 401, and P473. NSF (National Sanitation Foundation) issues these certificates to water filter manufacturers for public safety and to ensure that the filter does what it claims to do. 


The warranty period offered by AquaTru is 1 year. Plus, it gives a 30-day money-back guarantee on all direct purchases from the official website. Read the manual thoroughly to check the terms and conditions for replacement. 

AquaTru Countertop: Pros and Cons


  • Removes 83+ contaminants
  • No installation or attachment to the main water pipeline is required
  • Attractive design
  • Less water wastage ratio than other RO units
  • NSF-certified
  • 1-year warranty


  • Removes healthy minerals along with other impurities. 
  • Less water filtration capacity (1 gallon at a time)

Whole House Arsenic Water Filter: Crystal Quest

Crystal Quest arsenic water filter
Adarsh P/Aquaprofessor

Crystal Quest whole house system has made a name for itself in the market of Point-of-entry water filters. Its 3 filtration stages are efficient at removing arsenic and other pollutants in the main water pipeline.

Arsenic Reduction Rate

This whole-house filter is for you if your main water source has high arsenic content. It can remove upto 99% arsenic from your water and 10+ other contaminants. 


The filter housing can last 15-20 years with proper maintenance; the filters require regular replacement. The pre-filter for sediment filtration needs replacement every 2-6 months, depending on residue levels in your water. The activated carbon filter can last upto 6-months. 

Filtration Capacity 

Crystal Quest filter tanks can clean 750,000 to 1 million gallons of water. The filtration occurs in 3 stages: a pre-filter, arsenic reducing mineral tank, and an activated carbon filter. Besides arsenic, these filters can remove various chemicals, solvents, sediments, and heavy metals in the water supply or bring them down to safe levels. 


It uses all ISO-certified components to manufacture its filtration system. ISO (International Organization of Standardization) issues a seal of approval to companies after reviewing their manufacturing standards and checking if the company follows the internationally-set guidelines or safety protocols. 


Crystal Quest offers its customers a performance guarantee and 1-year warranty. You can contact their customer service and get a replacement for your filter parts in case of genuine issues or defects. 

Crystal Quest: Pros and Cons


  • Customizable
  • Available in 2 resin capacities
  • Easy-to-follow installation instruction manual
  • ISO certified components
  • Powder-coat finish on tanks to resist chipping and scratches. 
  • TDS meter and control panel
  • Stainless steel housing


  • Costly
  • Professional help needed for installation
  • Water wastage on flushing

Arsenic In Drinking Water: Types, Sources, & Health Risks

If you reside in a place with high arsenic levels or are concerned about potential exposure, take some time to learn more about this common contaminant and how you can protect yourself from it. This section will dig into the nature of arsenic, its types, where it comes from, and its implications for our health. 

Arsenic is a naturally occurring element and has been used for medicinal or chemical purposes for thousands of years. It can be found in almost all types of soils and is commonly found at high levels near mining sites and areas with natural hot springs or geothermal activity. 

Types of Arsenic Found

Two different types of arsenic are found in drinking water: Arsenic III, Arsenic V. Arsenic III also known as arsenite, is the most common form found in drinking water, while Arsenic V, also known as arsenate, is the less common and, luckily, less dangerous. 

Common Sources of Arsenic

Inorganic arsenic is found in all soils, allowing it to seep into underground water pipelines. It can also be released when arsenic-containing products are used in industries like mining, the production of pesticides, wood preservatives, and certain types of fertilizer. 

Health Risks Associated with Arsenic

According to the World Health Organization, almost all parts of the world have some level of arsenic in their drinking water. While some arsenic exposure is not harmful, prolonged exposure or exposure to high levels of arsenic may lead to serious health problems, including cancer and chronic diseases. 

According to the National Cancer Institute, long-term exposure to arsenic has been linked to an increased risk of developing gastrointestinal cancer, bladder cancer, and lung cancer. It also harms our nervous system, immune system, and endocrine system. 

The risk is especially high in people who drink water with an arsenic concentration of 10 ppb or more. Fortunately, you can take steps to protect yourself from drinking arsenic-laden water. 

How To Test For Arsenic In Water

The water treatment method greatly determines impurity levels in a locality. If you have a well water supply, you may experience a higher risk of arsenic contamination than a homeowner with municipal water. 

The first step in your journey to pure drinking water is to find out what exactly is in your supplied water. You can do this through a quality test. The federal government recommends that all homeowners get their water tested at least once every two years. Here are 3 ways to check for the presence of arsenic in your water:

1. Color-changing Strips

Arsenic contaminant-detecting indicator strips

It’s the simplest and quickest way to test your water. Contaminant-detecting indicator strips are available in the market that shows positive or negative results by changing their color when dipped into the water to be tested. 

You may also get a color chart to compare the shade of color on the trip. Usually, lighter shade means low contamination and vice versa. 

2. At-home Test Kits.

Arsenic testing kit for water

A variety of test kits are available nowadays to detect the presence of arsenic. Ensure that you choose the most trusted kit with high detection ability. These kits work on the principle of chemistry wherein two compounds react to produce a third compound with different properties.

For example, arsenic-containing water releases arsine gas when it is reacted with acidified water and zinc powder. So, if you observe gas bubbles in the plastic bottle provided with the test kit, know that arsenic is present in your water. 

All you gotta do is buy an arsenic testing kit for water, read the instructions and carry out the test procedure carefully. Then, the results can be tallied from the manual to know whether your water is safe for drinking or not. 

3. Laboratory Tests 

Water Testing in Laboratory

It is the most accurate method to test the presence of arsenic in your water. You can physically submit your water sample in a laboratory or call the testing agency to collect the sample from your home. 

The report may be declared immediately or delivered in a few days depending on the ability of the testing machinery or equipment in that laboratory. 

Once you know the results, take the next step: 

5 Inexpensive Easy Way To Filter Arsenic From Water

Important factors to be considered while selecting the best arsenic removal system

Once arsenic is detected in your drinking water, you can take action on a few different fronts to reduce your risk. Unfortunately, no device can completely remove arsenic from your water.

However, installing a water filtration system is one of the ways you can reduce the amount of arsenic significantly and lower your risk of experiencing negative health complications. 

Luckily, several types of filters on the market can help you get rid of arsenic. Depending on your brand, your water filtration system may reduce the amount of arsenic in your drinking water by as much as 99%. 

1. Adsorption Filters

Alumina, iron oxide, and activated carbon block filters are the three types of arsenic water filter systems that work on the principle of adsorption. Their large surface area facilitates the entrapment of elements or bonding. As a result, they can eliminate upto 95.5% of arsenic from water. 

2. Reverse Osmosis Filters

Reverse osmosis systems have a semi-permeable membrane that only allows water molecules to pass through, whereas the rest of the impurities are held back. As a result, they can reduce arsenic levels by 95%. 

3. Ion-exchange Filters

Also known as water softeners, the anion exchange system can significantly reduce Arsenic V levels in the water. They have a mineral tank containing resin media where the heavy metal ions present in water are exchanged with less harmful ions like sodium, potassium, or chlorine. Thus, the water becomes safer for consumption. 

4. Oxidation Filters

Strong oxidizing agents like potassium permanganate are used to oxidize arsenic ions present in water before they are passed through another medium. However, this process usually requires the presence of iron which, when oxidized with arsenic, makes the latter precipitate out and ultimately get removed. (20:1 iron to arsenic ratio)

5. Coagulation Filters

Coagulants like ferric sulfate or ferric chloride are present in these filters to bind to elements like arsenic and accumulate to form large particles, which are then easily separated from the water.  

Bonus Method: Distillation Filters

These are effective but rarely used in daily life due to the slow mechanism. They are based on the principle of evaporation. Dirty water is boiled in a distiller and evaporated. 

The hot water vapors from boiling water are passed through a cool condenser tube when they liquefy to form water and are collected in another container. Thus, all the contaminants, including arsenic, are left behind in the distiller while pure water collects in the container. 

The Expert Buying Guide On Arsenic Removal Systems

A plumber installing a Water Filter for arsenic

Arsenic removal filters are one of the most important facets of a healthy home. Yet, they are also some of the most misunderstood. You are in luck as we have revealed important factors to consider while selecting the best arsenic removal system in this guide:

Type of Arsenic Present in your Water Supply

It’s important to test your water to know the type of arsenic you need to remove. While many models advertise themselves as “arsenic-only” filters, this is not always true. In fact, there are several different types of arsenic removal filters on the market, each with its own unique features and specifications. 

For example, some models will remove both Arsenic III and V, while others will only remove one of the arsenic types. 

Presence of Other Contaminants

Your water will never contain only arsenic. Other contaminants like minerals, sediments, debris, heavy metals, volatile organic compounds, and harmful chemicals are always dissolved in water in addition to arsenic. So, you have to choose a filter that removes all these impurities along with arsenic from your water. 

The best way to decide is to test your water and then look for filters. We would also recommend going for customizable filter systems wherein you can add or remove any filter as per your need or present water quality. 

Filtration Capacity and Flow Rate

It totally depends on your usage or family size. For 1-2 people, water pitchers will do fine. For 3-5 people, an under-sink or countertop water filter would be a good choice. For higher flow rates or plumbing issues due to scaling or corrosion, it would be wise to go for whole-house systems. 


Though arsenic removal filters may cost more upfront than standard water filters, they will last much longer and save you money in the long run due to their increased capacity and reduced replacement costs. 

Additionally, the cost of POE and POU filters vary greatly. Decide whether you want whole house water filtration to get arsenic-free water for every household work or just drinking and cooking. Choose the one that suits your budget as well as your needs. 

Don’t ignore this:

Replacement filters and maintenance are also vital aspects of calculating the overall cost. Multi-stage filters can have 2-4 different filter cartridges. However, water pitchers may have multiple stages combined within a single cartridge. So, choose wisely. 

Since arsenic can build up over time, it’s important to consistently change your filter as recommended by the manufacturer to avoid more expenditure on the repair.

Which Water Filters That Remove Arsenic: FAQs

You have finally made it to the end of this article, and with that, we hope you have grasped as much knowledge as possible to make the right decision.

We have tried to answer all the necessary questions throughout the article regarding arsenic and its removal systems. However, in case you have some more doubts, read the following faqs or write them down in the comment section: 

Do Brita Filters remove arsenic?

Yes. Brita filters have been proven to remove 11% of Arsenic III (As3+) and 2% of Arsenic V (As5+). As the removal rate is not high, you can use them in areas with low arsenic levels in the supplied water.

Does a charcoal filter remove arsenic?

No. Charcoal or carbon filtration alone cannot remove arsenic from water. They can absorb hundreds of other impurities, but arsenic is not one of them. However, high-quality activated charcoal filters can reduce the levels of arsenic in water without eliminating it.

What is a safe level of arsenic in well water? 

Honestly, no level of arsenic is considered safe in the water. Earlier, the permitted levels of Arsenic set by the EPA (Environmental Protection Agency) were 10 micrograms per liter. But, recent studies have shown that even consuming little arsenic for many years increases cancer risk. Thus, EPA has brought down the permitted levels of arsenic to 0 micrograms per liter.

How long do Whole House arsenic filters last?

A whole house water filter is recommended for arsenic removal due to its multi-stage filtration process and advanced membranes. Its filter media can last upto 2 to 3 years with proper maintenance, after which it must be replaced. 

Does a water softener remove arsenic?

Water softeners operating on an ion-exchange mechanism cannot remove both types of arsenic. At normal pH of water, arsenic III exists in unionized form while Arsenic V exists in ionized form.

As most filtration membranes and media target ionized molecules, the elimination of Arsenic III becomes difficult. Thus, for the same reason, water softeners cannot capture As3+ while As5+, being in the charged state, can be removed by ion exchange. 

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