Laboratory tests 

Discover with complete transparency how our filters are rigorously tested by accredited laboratories: clear, verifiable, and sometimes surprising results...

  • Verifiable sources : Our filters have been tested in France by accredited independent laboratories. COFRAC, according to protocols that comply with the standard ISO/IEC 17025.

  • Important:No portable filtration system can guarantee absolute effectiveness in all filtration contexts. 

    Performance always depends on the initial quality of the water that will pass through the filter media.

  • Our commitment:To provide you with clear and transparent data so that you can make your choice based on the specific characteristics of these products.

Certifications and warranties

NSF (National Sanitation Foundation - USA)

  • Nature: Internationally recognized American private organization

  • Process: Voluntary certification and fee-based renewal (annually)

  • Our product : The Disruptor® filter media used in our products is NSF/ANSI 42 certified – "Drinking Water Treatment Units – Aesthetic Effects."

COFRAC (French Accreditation Committee)

  • Nature: Official French national authority

  • Process: Laboratory accreditation according to ISO/IEC 17025

  • Our tests: Our filters are tested in France by independent COFRAC-accredited laboratories, in accordance withISO/IEC 17025.

Double independent verification

Our filters have been tested in France by independent COFRAC-accredited laboratories in accordance with ISO/IEC 17025.
The filter media they contain also has international certification. 

The combination of this certification and the analyses carried out in France by accredited laboratories provides a guarantee of the accuracy and reliability of the results.

Check out our test reports

Quick view ( and overview of the filtration spectrum)
Families testedTest results
PFAS (Persistent Organic Pollutants)Reduction measured up to 99.98% (< LOQ according to test conditions)
TFA (by-product of PFAS)Not quantifiable after filtration (< LOQ according to test conditions)
Pesticides & MetabolitesReduction > 95% (< LOQ for most substances tested)
Heavy metals90–99% reduction depending on the metal (aluminum, lead, arsenic, fluorine, mercury, cadmium, etc.)
Vinyl Chloride Monomer (VCM)Not quantifiable after filtration (< LOQ according to test conditions)
Bacteria (E. coli, Giardia lamblia, etc.)Reduction of up to 99.999% (< LOQ, not detectable within method limits) – including Legionella and Salmonella, pathogenic bacteria monitored by health authorities.
VirusReduction of up to 99.998%
(according to the protocol of the Pasteur Institute laboratory in Lille, COFRAC-accredited - ISO/IEC 17025)
Drug residues / hormonesSignificant reduction > 90%
MicroplasticsMechanically retained by the membrane tested at 1.25 µm
Chlorine & derivativesReduction > 95%
Taste, odors, turbidityA clear improvement, both in taste and appearance.
Each user is, in a way, their own "laboratory."

  • < LOQ = Limit of Quantification: value below which the analytical method can no longer accurately measure the concentration of a substance. This means it is not quantifiable, but not necessarily completely absent.

  • The L2 filters used in our water bottles and our ÖKO TAP tap system are based on the same filter media (Disruptor by Ahlstrom Munskjo)
    The scale inhibitor integrated into the TAP is positioned downstream of the filtration system: it therefore does not interfere with the removal of contaminants, which is carried out upstream by the membrane.
    Conclusion: the ÖKO TAP's scale inhibitor has no negative impact on the filtration performance of pollutants.

This table provides a quick overview of the families of contaminants tested.
It does not replace the full reports: all detailed data (numerical values, limits of quantification, protocols) are presented below and available for consultation.
This allows readers to verify the scientific results for themselves.
ÖKO water bottle

Pasteur Institute - Legionella

Pasteur Institute - Salmonella

Pasteur Institute - Rotavirus

Pasteur Institute - MNV-1

Pasteur Institute Guadeloupe - Chlordecone

Pasteur Institute Guadeloupe - Guava

Pasteur Institute Guadeloupe - Capesterre

IANESCO - 200 Contaminants - BEFORE FILTRATION

IANESCO - 200 Contaminants - AFTER FILTRATION

Eurofins - PFAS

Eurofins - Fluorides

Eurofins - Heavy metals

TAP WATER 

IANESCO - 200 Molecules - BEFORE FILTRATION

IANESCO - 200 Molecules - AFTER FILTRATION

Eurofins - ÖKO TAP FAUCET UNIT

SGS - Anti-scale

L3 KIT

Pasteur Institute - Legionella

Pasteur Institute - Salmonella

Pasteur Institute - Rotavirus

Pasteur Institute - MNV-1

IANESCO - 200 Molecules

Why did ÖKO EUROPE repeat all the tests?

To confirm the reliability of the analyses already carried out since the product was launched on the market, ÖKO EUROPE repeated all of its tests in 2025 with independent laboratories. COFRAC accredited (ISO/IEC 17025), such as the Pasteur Institute in Lille, Eurofins-Euraceta, and IANESCO. 
The objective was to demonstrate the consistency and effectiveness of the filtration technology, even after several years of use in the field, and to go beyond older certifications and tests.

The results are unequivocal: filtration performance remains very high, with retention rates of up to 99.9993% for bacteria and a proven reduction of more than 200 contaminants (pesticides, heavy metals, viruses, etc.). 

The tests were carried out on different types of water and under various conditions, thus proving the reliability and reproducibility of the results.

TDS-3 Stick: the gadget that fools everyone?

Have you ever seen salespeople waving a TDS-3 stick around, saying that the water is "pure"?
❓ The TDS-3: what does it really measure? 

🔌 A conductivity test 
The TDS-3 only measures the ability of water to conduct electricity. It displays an estimate of total dissolved solids (TDS), i.e., the sum of ions present (mineral salts, sodium, calcium, magnesium, sometimes ionized heavy metals). 

 ⚠️ What it does not measure 
The TDS-3 does not detect neutral molecules such as PFAS, pesticides, microplastics, bacteria, viruses, drug residues, etc. 

👉 Believing that "0 TDS" means pure water is a mistake. It only means that there are almost no minerals left, which is bad for your health. 
According to the World Health Organization (WHO), regularly drinking completely demineralized water is not recommended: it deprives the body of calcium, magnesium, and trace elements necessary for the balance of drinking water. 


 ✅ The intelligence of ÖKO filters 

Our filters retain harmful pollutants (PFAS, pesticides, bacteria, heavy metals, etc.), while allowing beneficial minerals to pass through. 
The TDS may remain stable after filtration (or vary slightly), but what matters are the official results that prove the effectiveness on contaminants invisible to TDS-3. 

Tens of thousands of substances...

🔬 Tap water = thousands of molecules (natural + industrial).
❌ Impossible to test them all one by one.
🧪 Accredited laboratories test the most representative ones (pesticides, PFAS, heavy metals, microorganisms, etc.).
📊 The results for these families also reflect the effectiveness on similar molecules.
💧 Conclusion: tests show that ÖKO filtered water is healthier than "drinking" tap water.

Why is it beneficial to enrich water?

At ÖKO, we go far beyond the standards.
👉 Legal limit for the sum of 20 PFAS: 100 ng/L
👉 Water tested by IANESCO: 10,920 ng/L (109 times the standard)
👉 Result after filtration: 1.17 ng/L
➡ 99.98% elimination

💧 Conclusion: if ÖKO passes such extreme tests with flying colors, you can have complete confidence in its performance on your everyday water.

Potable does not mean perfectly healthy.

The potability of water depends on regulatory standards : when a contaminant is below a threshold set by health authorities, the water is declared "fit for consumption."

However, this compliance does not mean that it is completely free of undesirable substances. 
Traces of PFAS, TFA, chlorine, pesticides, heavy metals, drug residues, or other micropollutants may remain at levels deemed "acceptable" by regulations.

The ÖKO approach goes beyond simple compliance by minimizing the presence of contaminants.

Our goal: offer purer water (fewer contaminants tested than the sample before filtration), for everyday use or when traveling, while limiting the environmental impact of single-use plastic bottles.

Limitations of our filters 

What our filters do NOT guarantee

  • Our filters greatly improve and secure water quality, but *they do not turn all water into drinking water*.

  • Like all filtration technologies, *they do not remove 100% of contaminants*.

  • Their lifespan depends *on usage and the quality of the filtered water* (presence of sediments, turbidity, etc.).

  • Performance may vary depending on *actual conditions* (water type, temperature, flow rate, maintenance).

  • The performance figures announced are based on tests carried out with new filters, in accordance with standard industry practices.

  • In summary: no solution is perfect. But independent laboratory results show that ÖKO filtration is one of the most reliable and effective options available to the general public today.
    Added to this is the very positive feedback from our ever-growing community of users, who testify every day to the effectiveness and comfort provided by our filters. 

User responsibility

  • Adapt the type of filter to the context ( L2 for everyday use, L3 for high-risk areas)

  • Follow the conditions of use (clear fresh water, periodic replacement).

  • Pre-filter when the source water is cloudy or visibly polluted.

Why are our results reliable and why can you trust ÖKO products?

To question results is to cut oneself off from the seriousness and rigor that everyone deserves.
At ÖKO EUROPE, we work exclusively with independent laboratories. COFRAC accredited (ISO/IEC 17025), ensuring a structured methodology that complies with international standards.
The tests are conducted on standardized doped water, prepared according to the specifications of these accredited laboratories, in order to ensure a reliable and objective basis for comparison between each test.

  • Transparent methodology

  • Full traceability

  • Reproducible and verifiable results

👉 This requirement guarantees you real confidence, protected by French and European regulations.
💧 And that's what makes all the difference: choosing ÖKO means investing in safer water for you and your family.

Reproducibility and challenge

Any serious challenge must follow the scientific approach:

  • Buy the same products on the market

  • Funding tests at a COFRAC-accredited laboratory (e.g., Institut Pasteur de Lille)

  • Follow the same protocols and publish the results

Our commitment: transparency and continuous improvement

All our results come from independent laboratories accredited to ISO/IEC 17025 (COFRAC).

Errors in units or presentation may occur.
If you notice any inconsistencies, please let us know at info@okoeurope.com
We will analyze them and, if necessary, update them immediately.

We believe in constructive and respectful dialogue: your feedback helps make information more reliable, honest, and useful for everyone.

Our flagship products

Sale Off
ÖKO filter bottle (filter included)
63.00 EUR63.00 EUR
Sale Off
ÖKO 378 L replacement filter (Universal)
$35.0030.00 EUR
Sale Off
Tap outlet filtration system
109.00 EUR109.00 EUR
Sale Off
L3 OKO filter
39,00 EUR

Filtration Technology

OKO water filtration technology

The ÖKO Adventures

Filtering your water while traveling

Our PASSAGES 

IN THE PRESS

OKO filter water bottles 650ml 1 liter

ÖKO EUROPE x OM x Co.

OKO water filtration technology

Filtering YOUR WATER outside your home

Filtering your water while traveling

Why doesn't Pasteur publish his full test reports?

Accredited laboratories, such as the Pasteur Institute in Lille, apply confidentiality policies that comply with theISO/IEC 17025 : 
In practice, they communicate the final results, while some protocol details remain confidential (methodological properties, bias prevention):

- To ensure internal reproducibility and avoid bias, 

- To protect the methodological expertise of laboratories, 

- and to prevent commercial exploitation by third parties. 


Therefore, it is not ÖKO EUROPE that decides to "hide" this information: it is a regulatory requirement and a guarantee of scientific integrity.

Why doesn't ÖKO display the Pasteur logo?

Use of the Pasteur logo is subject to a license agreement:

Commercial use of the Pasteur logo requires the payment of royalties (calculated on turnover). We have chosen to devote these resources to expanding the scope of testing to other priority contaminants.

Conclusion

  • Pasteur tests are a scientific benchmark: our filters are capable of eliminating them with an efficiency measured at up to 99.99%, without logarithmic exaggeration.

  • The non-publication of complete protocols is a regulatory requirement, not a decision made by ÖKO EUROPE.

  • The decision not to pay for the Pasteur logo license does not diminish the value of the tests: on the contrary, it allows for the financing of broader analyses covering molecules not included in their panel.

  • Our communication is based on scientific rigor and a refusal to embellish the figures (because they are already very good).