Water filters are an essential part of any home. They help keep your family safe and healthy by removing impurities from tap water. However, choosing the right filter can be confusing because there are so many different products on the market to choose from! That is why we put together this directory of WQA-NSF Certified Water Filters for you to look at before making a decision!

If you are interested in drinking safe water and it tastes great, you should turn to one of the many WQA-NSF certified water filters that we will share from this article. These products are third-party tested and meet strict guidelines for safety and quality.

🤔 Why Do We Need Certified Water Filters?

Plain tap water contains many harmful contaminants that cannot be tasted or smelled. This contaminant, without our knowledge, enters into our bodies and could make us sick. And the best solution to this is water filters; they make sure to remove all these contaminants, such as heavy metals, chlorine, etc., by numerous water treatment processes.

But how do you know if the water filter you decided to buy is safe? You can’t always see, smell or taste contaminants in water. This is where third-party certificates come in. These organizations test the filters to make sure that the water coming out of them is free from contaminants

What is NSF Certification?

We always need to know if what we eat or drink is safe for us; this is where NFS shows up. NFS certification, which stands for National Sanitation Foundation, is a standard certificate that lets you know about the quality of your purchase.

what is nsf certified on water filters?

NFS takes every product under strict observation to make sure that the product meets the required standard. From extensive product testing and material analyses to unannounced plant inspections, every aspect of a product’s development is thoroughly evaluated before earning its certification. 

The process is also not a one-time inspection. NFS makes sure to go through regular on-site inspections and re-test products to give us the best they can.

What are the different NSF Standards?

NSF follows the American National Standards Institute (ANSI) standard development process. Members of public health, industry and user representatives get together and form these standards to make sure that they give us the best. Here are a few prevalent standards:

NSF 53: Involves material security, structural integrity, and contaminates reduction capacity claims. 

NSF 58: For lead and other general contaminants elimination.

NSF 42: Signifies a water filter’s ability to remove chlorine from water

NSF 401: It rates the ability of a water filter system to reduce up to 15 specific contaminants.

NSF 372: Certification for having lead-free fittings and components.

NSF P473: Guarantees that it reduces PFOA and PFOS chemicals in water, harmful artificial chemicals.

✔️ Best NSF Certified Water Filters

Here are some of the best NSF-certified water filters available in the market today:

Home Master TMHP HydroPerfection Reverse Osmosis System


When it comes to water filtration Home Master has been a leader in the space for over 20 years. Their TMHP System is my highest-rated NSF Certified recommendation. Mainly due to the fact that it is EPA registered and includes a patented remineralization system that adds calcium and magnesium twice during the purification process for reduced storage tank degradation that leaves a highly pure mineral water on tap.

The components in the TMHP meet or exceed NSF standards plus they are an NSF-listed company. I also love the unit for those that are on well water thanks to the KDF85 Iron Filter that dissolves iron up to 1ppm.

If you just want one option without getting your brain in a twist, I would just go with the Home Master TMHP.

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Aquasana OptimH2O

aquasana optimh2o review

Aquasana OptimH2O is reverse osmosis water clear out that is usually linked beneath the sink. This water filter, in general, has exceeded many NSF requirements that other water filters could not. 

Aquasana is designed to filter out 85 contaminants x5 contaminants that an ordinary water reverse osmosis typically covers. It also comes with a stylish faucet in conjunction with a retaining tank and a remineralizing device that adds required minerals to the water, even if this system is quite costly. At the same time, in comparison to the rest, it nonetheless is worth the price.

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Culligan FM-15A

Culligan FM-15A Faucet-Mount Advanced Water Filter, 200 Gallon, White
  • Provide your family with visibly clean, great-tasting water for drinking, cooking and more
  • FEATURES: Reduces azine, chlorine, lindane, lead, particulates class I, turbidity while removing bad taste/odor; Carbon block filtration method; Flow rate of 0.5 gpm at 60 psi; 30-100 psi pressure range; 40-100°F temp range; Easy installation with no tools
  • COMPATIBILITY: Includes adapters for all standard sink nozzles (does NOT fit drop-down faucets)
  • FILTER LIFE: Up to 2 months or 200 gallons, depending on usage and water conditions
  • CERTIFICATION: Tested and certified by IAPMO against ANSI Standard 42 and 53

The Culligan FM_15A is a budget-friendly option as it comes with great qualities at an affordable price. It is made to be connected directly to your faucet and has an on-off switch allowing you to access unfiltered water when required.

This is a well-built metal and plastic construction that meets two of the NSF standards. It can filter 200 gallons of water before changing the system being much more budget-friendly.

PUR 3-Stage Faucet Mount

3- Stage Faucet Mount Filters 7 Pack. With Max- Ion Filter Technology
  • Make sure this fits. by entering your model number.
  • Water filtration sistem

This Faucet filter is directly connected to the faucet of your tap and comes with an on-off switch for easier change when regular tap water is required.

The PUR 3-Stage Faucet mount filter can filter out 100 gallons of water and is easier to remove and replace. It also has an automatic safety monitor gauge which notifies you about when it is needed to be replaced.

Also, see our list of NSF Certified Gravity Filters

What is WQA Certification?

WQA, also known as Water Quality Association, is an Illinois-based trade association representing the residential, commercial, industrial, and small community water treatment industry in the United States.

WQA represents the water treatment industry devoted to treating water for residential and commercial/industrial use.

what is wqa certified on water filters?

✔️ Best WQA Certified Water Filters

Here are some of the WQA certified water filters available for you.

Woder 10K 

Woder WD-10K-ADV-DC Ultra High Capacity Under Sink Water Filter with Direct Connect Fittings - WQA Certified 10,000gal – Removes Chlorine, Lead, Chromium 6, Heavy Metals, Odors/Contaminants - US Made
  • WQA GOLD SEAL CERTIFIED - to NSF/ANSI 42 for Chlorine, taste, odor and NSF/ANSI 372 for lead free compliance as verified and substantiated by test data. . Eliminate Lead (99.9%), Heavy metals, Chlorine (99.9%), Chromium 6, Volatile Organic Compounds and other contaminants (99.9%), odors and bad tastes, Mercury and turbidity. The Woder 10K gives great smelling and tasting water, cold and fresh from the tap.
  • MADE IN THE USA - NO PLUMBING REQUIRED – Comes with ‘Direct Connect’ hoses that fit standard 3/8” water valves under US kitchen and bathroom sinks. The 3/8” Direct Connect Hose are made to install directly to the existing cold water valve and faucet stem under your sink.
  • This filter should be used in conjunction with municipally treated drinking water or water that has been properly disinfected prior use.
  • BEST FILTER YOU’LL EVER BUY. Remove the worst-offending minerals while allowing essential minerals natural in water to pass through unaffected. Amazon’s best-rated water filter, the Woder 10K will last for up to 10,000 gallons! Enjoy a strong flow and easy stream from the world’s best under sink filtered water. Cartridge capacity – 1 Year
  • ENJOY TAP WATER AS PURE AND HEALTHY AS SPRING WATER - System is certified by WQA to NSF/ANSI 42 for Chlorine, taste, odor and NSF/ANSI 372 for lead free compliance as verified and substantiated by test data, so you can have complete confidence in the quality of Woder-filtered water. Flow rate 3GPM @65 psig

This WQA certified water filter also has NSF 42 and NSF 372 certification for making lead and chlorine-free drinking water.

Made in the USA, this water filter doesn’t require a plump as it comes with a direct connect horse that fits standard 3/8″ water valves and can be included under a sink. Woder 10K can filter 10 000 gallons of water and remineralize the filtered water as well.

iSpring RCC7AK

iSpring RCC7AK, NSF Certified 75 GPD, 6-Stage Reverse Osmosis System, pH+ Alkaline Remineralization RO Water Filter System Under Sink, Superb Taste Drinking Water Filter
  • Certified to NSF/ANSI 58, 6-Stage Alkaline Remineralization Layered Filtration - Exclusively designed to restore the natural alkalinity and mineral balance of water; this reliable and ultra-safe Reverse Osmosis (RO) water filtration system converts your water into clean, pure and healthy drinking water by removing up to 99% of over 1,000 harmful contaminants like chlorine, fluoride, lead (removes up to 98%), arsenic, asbestos, calcium, sodium and more.
  • GREAT-TASTING MINERAL WATER - A standard 5 stage RO system produces slightly acidic water with a pH of 7. 0 or below because the RO membrane removes not only harmful pollutants but also a few helpful minerals. The iSpring RCC7AK Reverse Osmosis water filter includes an additional 6th stage - an Alkaline Remineralization filter which restores healthy minerals and produces a balanced alkalinity, which gives your water a more natural taste than regular 5 stage RO water filter.
  • LOW MAINTENANCE - Transparent 1st stage housing for easy visual inspection. Three extra long life pre-filters to remove large contaminants and protect RO membrane. Ultra fine (RO) filter to remove contaminants down to 0. 0001 microns; fine GAC filter to provide final polishing to the purified water and (AK) filter to finally restore just the right proportion of healthy minerals and a natural alkaline balance. The end result is great-tasting bottled-water quality.
  • EASY TO INSTALL & NO LEAKS - The water purifier is designed for do-it-yourself installation and all necessary parts for installation are included. Backed by clear installation manual, instructional videos, and access to life-time technical support. The entire alkaline water filter fits nicely under a kitchen sink. For leak-free installation, simply push tubing ½ inch deep into quick-fitting connectors and lock; no threading pipes needed.
  • 100% SATISFIED CUSTOMERS - RCC7AK from America’s favorite brand of under sink water filter is the highly rated reverse osmosis systems. Comes with 1-year limited manufacturer warranty upon registration and lifetime personalized support from GA, USA, combined with premium quality components, this water filter is to deliver endless bottled quality drinking water right in your home for many years to come, eliminating plastic waste.

Next in line is the iSpring RCC7AK, which filters out 1000 contaminants from tap water, turning it into safe drinking water. These contaminants include lead, chlorine, chloramine, endocrine, endocrine disruptors, fluoride, arsenic, asbestos, calcium, sodium, pesticides, heavy metals, herbicides, viruses, bacteria like e-coli, and many more.

This water filtration system can be fixed easily under a sink and comes with a sixth stage Alkaline Remineralization making the water even more neutral and tastier to drink.

AQUA CLARA Universal Cartridge Filter

AQUA CLARA Universal Cartilage filter is yet another brand with the WQA certification. This water filter has a multi-phase filtration process which yields clean and safe water. 

This filtration process removes heavy metals such as arsenic, lead, mercury, cadmium, and chromium while at the same time eliminating odor and increasing the taste.

This filter can last four months and doesn’t remove any essential ions such as calcium or magnesium like reverse osmosis and ion exchange systems do.

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NSF vs. WQA Certification

NSF and WQA are highly recognized certifications with very high standards, but they do have their uniqueness and differences.

The main difference between NSF and WQA is the support of ANSI. AS I mentioned before, ANSI, which has many strict conditions, supports NSF and is the first process granted by the ANSI Audited Designator of Standards. The ANSI process includes requirements to ensure that no one group dominates the process. NSF standards committees are composed of an equal number of producers, users, and regulators. WQA is, on the other hand, consensus-based and is developed by the company.

Another difference is that NSF requires every little detail of any substance used in the process. They do this to make sure that nothing is left out which might be harmful. WQA, on the other hand, focuses on the ethics in testing, sales, and services of the industry. This doesn’t mean that WQA cannot be trusted.

NSF also has many qualification levels and does thorough tests on many possible contaminants, even though WQA doesn’t.

Both the certifications are trustworthy in their ways. The two companies are known to be trying to cooperate in the certification process for a long time.

Certified vs. Tested To

People seem to always mix up the wording ‘certified’ and ‘tested to’. 

When they say that a product is ‘certified’, the product has gone through various tests and has passed them accordingly. This means that the product is proven to be safe and healthy for use.

While ‘tested to’ is something entirely different. ‘Tested to’ means that the product is tested but hasn’t been evaluated yet. This means that the product may or may not be certified and safe to use.

Bottom Line

It is essential to have clean water in the home, but not all filters are created equal. That’s why it is necessary to look for a WQA-NSF certified filter that has been tested and proven to be safe.

In general, both NSF and WQA are recognized qualifications with different boundary levels and requirements. While NSF focuses on the product quality and tests them, WQA focuses on how the product is made and the industry’s rates.

Water filters that have both these qualifications make them an extra great choice. Make sure you always do a thorough job while purchasing a water filter, as it plays a significant role in keeping your family and loved ones healthy. 

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