Water filters with independent laboratory testing


TAPP Water is the only faucet water filter company that shares independent lab tests openly.

Choosing the right water filter can be tricky. How can you know that our water filters really work?

The first step is to make sure that the water filter you want to buy has independent lab tests and certificates of the filtered water. TAPP Water is the only tap water filter company that openly shares lab tests and certificates for customers to see.

Before you continue reading below,
know the most common contaminants in tap water.

Independent laboratory tests of our filters: Essential, EcoPro, EcoPro Compact, PitcherPro and ShowerPro.

Tappwater is the only tap water filter company that openly shares laboratory tests and certificates:

  • Our filter  Essential, The 3-stage filtration system is tested according to NSF-42 and accredited to filter/remove more than 70 substances commonly found in tap water.
  • Our jar PitcherPro, It also filters in 3 stages and has been tested and certified by NSF-42 and NSF-53 to remove more than 80 contaminants from tap water.
  • ShowerPro, with 4-stage filtration, has been tested according to NSF/ANSI 177 to remove more than 70 substances.
  • EcoPro & EcoPro Compact 5-stage nanotechnology filters are tested according to NSF-42, NSF-53 and NSF-244 and filter/remove more than 100 potential substances from tap water and reduce more than 30.

Seals of the tests and certifications that we do every year by accredited laboratories to ensure its quality and proper functioning:

simplelab FDA lead free BPA FREE cruelty free unión europea  CE ECP-FRIENDLY itabe NSFAQA SOLAR IMPULSE

* The full laboratory report is available for download at the end of this article.

Summary table of what Tappwater filters filter and reduction efficiency

Substance Description of what is filtered
Organoleptic parameters (flavor, color and smell) The unpleasant flavor or smell of water causes it, generally, chlorine, its organic by -products or pollutants.
95 % or more
Cal Pitcherpro, Ecopro and Ecopro Compact prevent lime from being formed in the kettle, coffee maker, sink, water bottles, jugs and anywhere else where you use tap water thanks to our patented lime inhibitory formula.
80% or more+
Chlorine and chloramine Chlorine is added to running water to disinfect it from viruses and bacteria that are harmful to health.
95 % or more
Chlorine by -products More than 100 by -products, including the 32 acquaintances of chlorine (COV), such as trihalometans (THM), considered potentially carcinogens.
95 % or more
Microplastics Micorial plastic pieces.
95 % or more
Heavy metals It is natural that in the water there are leads of lead, zinc, manganese or copper, among others, due to the corrosion of the pipes through which the water circulates.
90 % or more
Pesticides 14 registered pesticides, among others, Chinano, Hecetacloro and Lindano
95 % or more **
Herbicides 12 registered herbicides, among others, 2.4-D and attrazina
95 % or more **
Nitrates and nitrites Generally, they are due to the use of fertilizers. Unlike nitrates, nitrites are present in water in a very low concentration.
70 % or more
Pharmaceutical products Drugs have been found in tap water in very low concentrations. For example, active ingredients such as athenolol, carbamacepine, stronation, meprobamate and trimetoprima have been found.
95 % or more **
PFAS These substances also include PFOA, PFOS and PFNA. Sometimes they are called "eternal compounds."
90 % or more **
Pathogens Most harmful bacteria, such as E. coli or microbial cysts, such as Giardia and Cryptosporidium.
90 % or more
Turbidity Turbidity serves to measure to what extent its transparency loses due to the presence of suspended particles.
90 % or more

* Filter efficiency percentages, as well as filter life, will vary depending on the initial quality of the tap water coming into your home.

** Based on public research by the NIH and other research institutions on the block-shaped activated carbon we use in the EcoPro and EcoPro Compact filter. Here you can see what the activated carbon filters remove and reduce.

Read the comparison of TAPP Water with other water filters.

What TAPP Water does not filter

There is a common misconception that a water filter must remove all substances from tap water. Below you will find a list of substances and parameters that the EcoPro and EcoPro Compact filter does not remove or modify and why it does not:

Substance(s) Description
TS ( total disolved solids)
The TDSs are basically the minerals that the water carries, such as inorganic salts and small amounts of organic matter that dissolve in the water. They usually be calcium, magnesium, sodium, potassium, carbonate, bicarbonate, chloride, sulfate and nitrates. Most laboratory reports use the electrical conductivity parameter instead of TDS. In no case, the presence of TDS is an indicator that water is drinking or not.
Healthy minerals
The minerals that can be found in the water are mainly calcium, potassium, magnesium and chloride among others. The human being needs these minerals to live. Carbon blocks to hardly reduce the concentrations of these essential minerals.
Hard water is the one with a high concentration of calcium and magnesium. With regard to its potability, generally, that water is hard is an advantage. However, it accumulates lime deposits that are often considered a problem.
pH is a way to measure acidity or alkalinity of water. A pH between 6.5 and 8.5 is considered normal. The body is able to adjust this pH of the water that you have drunk with the body in natural state (the pH of the blood is 7.4). No health risk related to pH within the mentioned legal interval is known.

Independent laboratory analysis to confirm that the filter performs as promised

Every year we perform laboratory tests with third-party laboratories. The following table gives an overview of one of these tests performed by SimpleLab (USA), AQA (Germany) and iTabe (Spain), three of the world's most recognized laboratories. The latest tests were conducted in Barcelona and Los Angeles in August 2021*. The link below the table includes the full list of substances with external laboratory sources to verify the claims.

Parameter/substance Before filtering After filtering Reduction
Total Chlorine (ppm) 0.8 <0,05 More than 95 %
Cloramine (ppm) 0.8 <0,05 More than 95 %
pH 7.8 7.9 Not applicable
Turbidity (NTU) 0.17 Undetectable 100%
Microplastics (particles /l) 29 Undetectable 100%
Nitrates and nitrites (ppm) 0.22 Undetectable 100%
Heavy metals (average lead, manganese, zinc and barium) (ppm) 0.15 Undetectable 100%
Disinfection by products with chlorine (THM, COV, AHA) (PPM) 6 Undetectable 100%

* Note: The reason for choosing Los Angeles, USA, is that this was the worst tap water in terms of contaminants that we found during all tests. Laboratory tests have also been done with water from Barcelona, Valencia, Mallorca, New York, Toronto, Milan, Malta, India, Bhutan, Venezuela, Indonesia and many other countries.

Product Water Quality Tests

  • Download the full EcoPro and EcoPro Compact filter independent laboratory testing and certification report here.
  • Here here is the report of PitcherPro's independent laboratory results and certifications.
  • Here you can also get certified ShowerPro tests.

Finally, for the complete list of what the EcoPro and EcoPro Compact water filters remove, please refer to here.

If you have any questions about what substances TAPP Water filters remove, or the lab results, please feel free to write to us: support@tappwater.co