Top 7 Best WQA & NSF Water Filters

There are different water filters available for the money that guarantee up to 99 per cent purity. However, when a filter is certified by leading authorities and meets the set standards, it increases peace of mind, the value for money, and working efficiency. The leading standards in the domain of water filtration are NSF and WQA. In this article, we will briefly explain these standards, and we have also included the best NSF and WQA certified filters for you to buy.

NSF Certification

NSF Certification

WQA certified

NSF stands for National Sanitary Foundation; NSF is a non-profit organization and was established in 1944 in the USA to create standards for sanitation and food safety for public health. What NSF does, is not of paramount consideration here. Our concern is how an NSF certification helps improve the quality of the water filtration system.

When a company boasts about 98 or 99 per cent impurity removal, if they have an NSF certification along with their product, it can achieve this high level of purity. NSF tests these products independently and is pretty strict in their standards. The problem arises that some companies do not consistently manufacture products with the same working output. At this point, we step in for you by picking up the filters that have the best reputation in the market, are trusted, and give the same result every time.

We have included the Best NSF certified filters in different categories so that you can select the one according to your needs.

Best WQA & NSF Water Filters (Comparison)

 Best WQA & NSF Water Filters 
Editor's ChoiceZero Water 10-Cup Pitcher 3 Replacement Filter
  • 5-7 Stages filter

  • 10-cup water capacity

  • Removes TDS, chlorine, and sediments

Brita Ultra Max Filtering Dispenser
  • 18 cup water capacity

  • Filters chlorine, chloramines, and heavy metals

  • Easy filter cleaning

Aquasana AQ-4100 Water Filter System
  • Filters 10,000 gallons of water

  • Easy installation

  • 6 months filter life

Waterdrop Refrigerator Water Filter
  • Compatible with mulitple refrigerators

  • 6 months filter life

  • Removes heavy metals and chemicals

Olympia Water Systems OROS-50
  • 50 gallons of water/day capacity

  • Reverse Osmosis Fitration System

  • 0.0001 microns Filter

Woder WD-S-5K Under Sink Water Filter
  • 2-3 years filter life

  • 2 gallons water capacity/minute

  • Easy installation

Watts Premier 3-Stage Water Filtration System
  • UF3 hollow fiber technology

  • Easy installation

  • 10-12 months filter life


Best NSF Certified Filters

1. Zero Water 10-Cup Pitcher with 3 Replacement Filter and Free Water Quality Meter

  • Capacity: 10 cups
  • Best for: coffee, tea, and other drinks
  • Removes: TDS, chlorine, sediments, and odor

More features: This compact water filter pitcher is made of BPA-free food-grade material. It accompanies 3 replacement filters and water-quality meter.

Zerowater 10-cup pitcher

Filtration Capacity: The NSF certified water filter pitcher has a small capacity of 10 cups of water. Pitchers are perfect for table use at home or office. You can fill the pitcher with tap water, wait for 10 minutes to get the water pure and enjoy pure water with dinner. You can also keep in the fridge to get pure cold water. It is the best option to get pure water for your coffee, tea, and other drinks. You will notice a taste improvement in all your drinks, which have water as an ingredient.

Filtration Capabilities: The filter installed in the pitcher employs 5 stages to bring you pure drinking water. Its ion exchange technology gives you the best results as compared to costly water filtration systems with 5-7 stages. The pitcher removes 99.6 per cent of TDS, chlorine, sediments, and other contaminants. Don’t worry about its working efficiency as NSF has tested it.

Ease of Use: One crucial thing to consider while buying a water pitcher is the ease of use. Zero Water has designed its pitcher to increase its functionality. Refilling is easy as you like, and it comes with a water quality monitor to check the quality of filtered water.

Our Opinion and Verdict:

Zero Water pitcher should be your first choice if you are looking for pure drinking water for table use. There are thousands of satisfied users of this pitcher, and our side highly recommends it.

2. Brita Ultra Max Filtering Dispenser, Extra Large 18 Cup, Black

  • Material: BPA-free
  • Capacity: 18 cups
  • Removes: chlorine, chloramines, and heavy metals

More features: It’s super easy to use due to the simple mechanism. The filter can clean up to 40 gallons of water i.e. around 30,000 bottles of water.

Brita water filter pitcher

Filtration Capacity: If you have a large family and pitcher is not enough for you, you can get Brita water dispenser with NSF certification. It can provide 18 cups of filtered water in one refilling. It is a very reasonable option for living rooms, kitchens, apartments, and offices. You can also adjust this dispenser in your refrigerator if it has ample space. One set of filters can provide you around 40 gallons of water, which is equivalent to approximately 30,000 water bottles.

Filtration Capabilities: The filters used in the dispenser are of high quality and very effective. With Brita, you do not need to worry about the quality of the water you are getting. It will filter chlorine, chloramines, and heavy metals like zinc, cadmium, copper, and mercury.

Ease of Use: The dispenser uses a high-quality, durable faucet for water dispensers. Refilling is easy, replacing the filter just takes a couple of minutes, and the display indicator tells you about the time to replace the filter. Setting up the dispenser is just a couple of minute’s tasks. All you have to do is wash the filter for 15-20 seconds with water, insert it according to the directions given in the user’s manual. Fill the dispenser with cold water, and you are good to go.

Our Opinion and Verdict:

An excellent water filtration option for larger families or offices.

3. Aquasana AQ-4100 Deluxe Shower Water Filter System with Adjustable Showerhead

  • Material: Copper/zinc
  • Type: Shower filter
  • Filtration capacity: 10,000 gallons

More features: The filter system comes with showerhead. All you need to install the showerhead with the filter and enjoy chlorine-free water for shower.

Aquasana with adjustable showerhead


Filtration Capacity: In some areas, tap water is of such a low quality that you need to install a shower filtration system to take care of your skin and hair. You can also use a showerhead filtration system if you are worried about your hair fall or rough skin. The Aquasana shower head can provide you with 10,000 gallons of filtered water. For a single person, it can last for around 6 months.

Filtration Capabilities: The premium NSF certified filtration media is composed of copper/zinc and coconut fibre. The coconut fibre reduces chlorine and makes the water breathable. It will improve air quality while you take a shower. The copper/zinc media removes any residual chlorine and balances out the pH of the water, so it does not have any impact on your skin and hair.

Installation and Use: It comes with simple DIY installation; you just have to attach the showerhead and leave the rest to the filter. The filter does not impact the water pressure.

Our Opinion and Verdict:

If you are facing problems with your hair and skin due to poor water quality, Aquasana NSF certified showerhead is the best solution for you.

4. Waterdrop NSF 53&42 Certified DA29-00020B Refrigerator Water Filter, Compatible with Samsung DA29-00020B, DA29-00020A, HAF-CIN/EXP, 46-9101, Advanced, Pack of 3

  • Type: Refrigerator water filter
  • Capacity: 300 gallons of water
  • Warranty: 1 year

More features: This water filter is compatible with a wide range of refrigerators. It eliminates lead, zinc, chlorine and other contaminants.

Waterdrop water filter


Filtration Capacity: Some refrigerators come with a dispenser that uses a water filter to provide you with pure drinking water. The pre-installed filter completes its life pretty soon, and then you need a replacement. It is better to have a replacement filter, which is certified by NSF. Waterdrop brings you an NSF certified filter which can last for around 300 gallons of water or 6-months depending upon the size of your family or the volume of gallons consumed.

Filtration Capabilities: The filter has been certified to reduce 99.6% of lead, 99.9% of cysts, 96.6% benzene, 98.4% of Carbofuran, 96.6% of Endrin. It is also certified by NSF to reduce 97% of chlorine. The materials used in the making process are also certified by NSF to be lead-free.

Compatibility: It is compatible with a wide range of refrigerators.

Our Verdict and Opinion:

Waterdrop offers the best refrigerator filters with NSF certification.

5. Olympia Water Systems OROS-50 5-Stage Reverse Osmosis Water Filtration System with 50GPD Membrane – NSF Certified

  • Type: 5-Stage Reverse Osmosis
  • Filtration Capacity: 50 gallons per day
  • Removes: chlorine, volatile organic compounds, bacteria, viruses, and insecticides

More features: It’s easy to install within a few minutes. Furthermore, you don’t need special equipment to install it. The installation equipment comes with the box.

Olympia RO water filter


Filtration Capacity: When you have a large family or a big office, you need an NSF certified filtration system with a large capacity. With Olympia, you can access 50 gallons of water in one day. The pressurized tank has a capacity of 3.2 gallons. It means that for every one gallon of filtered water, the system will waste 3.2 gallons of tap water.

Filtration Capabilities: The unit consists of 5 stages of filtration to provide you with the purest of water possible. The water produced is the same as bottled water. The first stage removes sediments; the second and third stage removes chlorine, volatile organic compounds, bacteria, viruses, insecticides, and herbicides from your water. The fourth stage is the heart of the system. It is the RO membrane. The RO membrane is so delicate that it can filter out the contaminants as small as 0.0001 microns. It means that there is nothing harmful left in your filter. It also removes heavy metals like lead, chromium, iron, and cadmium up to 99 per cent. The last stage removes any residual chlorine, odour, and purifies the water before coming out of the faucet. For more faucet filters, do check this guide.

Installation: All the equipment you need to install the unit comes along the purchase. You can install it yourself if you are aware of the plumbing fixtures. You may face a little problem with drilling a hole, but if you know how to handle a drilling machine, you do not need the services of a professional plumber.

Our Verdict and Opinion:

It wastes a lot of water, if you are an environmentalist, you may not consider buying this system. Overall, it is a very effective filtration system with 5 stages of water filtration.

WQA Certification

WQA stands for Water Quality Association. When a water filter is WQA certified, it means that the manufacturers have voluntarily credited themselves with demonstrating a commitment to high working standards, growing their expertise, and improving customer service. We have selected the best WQA certified filters for you and included them in our list for you to buy.

Best WQA Certified Filters

6. Woder WD-S-5K Under Sink Water Filter with Direct Connect Fittings – WQA Certified – USA Made – Ultra High Capacity

  • Type: Under sink
  • Capacity: 5,000 gallons
  • Flow rate: 2 GPM

More features: You can use one filter for 2 to 3 years. It’s perfect for average household tasks like washing, cleaning eatables and drinking.

Woder water filter


Filtration Capacity: It is an under-sink model with a filtration capacity of around 5,000 gallons. For an average American household, it can last for 2-3 years for drinking, washing eatables, and cooking purposes. With the Woder under-sink model, you do not need to worry about the quality of water in your kitchen anymore. The average flow rate of this filter is around 2 gallons per minute at an optimum water pressure.

Filtration Capabilities: It is not only certified by WQA, but it also has NSF certification to remove chlorine and odour. It removes 99.9 per cent of impurities found in municipal water, such as chlorine, volatile organic compounds, bacteria, viruses, and other harmful contaminants.

Installation: It is a direct install model; you do not need any plumbing to set it up. With just two simple connections of 3/8 inches, you can get pure water in only 15 minutes after receiving your filter.

Our Opinion and Verdict:

A very easy to install, operate, and use under sink WQA certified water filtration system. If you are looking for a hassle-free filtration unit with the best results, Woder is a must-buy for you.

7. Watts Premier 531130 Filter-Pure UF-3 3-Stage Water Filtration System – WQA Certified

  • Type; 3-Stage
  • Filter life: 2 – 3 months
  • Removes: chlorine, chloramines, herbicides, and insecticides

More features: This water filtration system comes with all necessary installation equipment. It doesn’t slow down the water flow.

Watts water filter


Filtration Capacity: The manufacturer states that these filters can work for a year. There is no indicated capacity in gallons. The filters are potent and can meet the demands of a medium family for 10-12 months. However, once you feel the flow rate slows down, or the taste of water changes, you must check the filters immediately.

Filtration Capabilities: The system uses 3 stages of filtration to provide you with the cleanest drinking water. The system uses a UF3 hollow fibre technology to trap the tiniest of the particles possible. The system gets rid of chlorine, chloramines, herbicides, insecticides and other harmful contaminants and can provide you with 98 per cent pure water.

Installation: It is easy to install the system, and you get all the equipment needed to install the system.

Our Opinion and Verdict:

When it comes to three-stage water filtration with WQA certification, Watts has the best reputation in the market. There are hundreds of satisfied users of this product.


We are sure that your search for filtered water with NSF and WQA certification has been answered after reading our article. All the systems included in our list are best in their respective working domain. You can buy the one that meets your needs.

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