Test results

What our filter does.

We have FILTR tested in independent laboratories. On this page you will find what was tested, under what conditions and what the results were.

>99% reduction in PFOA, PFOS, PFHxA and PFDoS, also after 150 liters, at the end of the filter's lifespan

99.99% reduction in bacteria (E. coli), also after 150 liters, at the end of the filter's lifespan

150 L tested up to the end of the filter's lifespan, not just with a new filter

All results

What FILTR removes from your water

All results in one place. For each substance you can see how much is removed and when that was measured.

Substance	Reduction	Measured
PFAS
PFOS Perfluorooctanesulfonic acid	>99%	New and after 150 liters
PFOA Perfluorooctanoic acid	>99%	New and after 150 liters
PFHxA Perfluorohexanoic acid	>99%	New and after 150 liters
PFDoS Perfluorodecanoic acid	>99%	New and after 150 liters
PFDoA Perfluorodecanoic acid	99%	>99% new, 99% after 150 liters
Bacteria
E. coli coliform bacteria	99.99%	New and after 150 liters Filter · tested by SGS
Legionella bacteria	99.9997%	New filter material Filter material
Other substances
Lead as particles	~100%	At the NSF/ANSI 53 test level Filter material
Lead dissolved	~100%	New filter material; decreases with use Filter material
PCBs industrial toxins	99.98%	New filter material Filter material

What this means. PFOA and PFOS are the best-known and most studied PFAS. Even at the end of the filter's lifespan, FILTR removes all five mentioned PFAS by 99% or more. If you replace your filter every month (or after 150 liters), you will stay within the lifespan we have tested.

How we test

PFAS was tested in an independent, ISO/IEC 17025-accredited lab in the EU, according to the European standard EN 17892. The test water contained PFAS concentrations far above the European drinking water standard, much higher than what is found in Dutch tap water. Measured with a new filter and after 150 liters.
Bacteria were tested by SGS, one of the largest testing institutes in the world: water with millions of E. coli bacteria per 100 ml passed through the filter at several points during its lifespan.
The filter material was tested in the lab for legionella, lead and PCBs, among other things, partly by independent institutes.

The technology

Fine filter material that attracts dirt

At the heart of FILTR is Finnish filter material with activated carbon. It works in three ways at the same time:

Electrical charge. The fibers have a natural positive charge. Most very small particles in water are negatively charged and are therefore attracted and held.
Fine pores. With pores of approximately 1.2 to 1.5 microns (a hair is about 70 microns thick), larger particles are mechanically stopped.
Activated carbon. Binds substances such as PFAS to the enormous surface area of the carbon and also improves taste and smell.

The filter material complies with NSF/ANSI 42.

How to get the most out of your filter

Test results apply to the conditions under which testing was conducted. Therefore, these are the conditions FILTR is designed for:

Tap water. FILTR is intended for (Dutch) tap water, at home and on the go.
Replace every month or after 150 liters. This way you stay within the lifespan we have tested, and the filter remains hygienic.

Last updated: October 2026. Results apply to the tested samples under the described test conditions.