Consumentenbond water filter test 2026: what does it cover?

Published on 18 July 2026 | Reading time: ~11 minutes

If you search for "Consumentenbond water filter test", you probably want to know one thing: which water filter really performs, and do you need one at all? The Consumentenbond tests water filters in an independent laboratory, but the results sit behind a paywall and the test covers only part of the market. In this guide we explain exactly what the organisation tests, what its conclusions are and, just as importantly, which type of filter falls outside the test.

Dutch tap water is among the most closely monitored in the world. According to the industry association Vewin, our drinking water meets the strictest European standards and is checked for hundreds of substances every year. Even so, a growing group of households opts for extra filtration. That starts with understanding what a test such as the one from the Consumentenbond does and does not tell you.

1. What does the Consumentenbond test in water filters?

The strength of the Consumentenbond approach is that it actually measures in a lab what a filter achieves, rather than relying on the manufacturer claims. The organisation looks at taste improvement, limescale reduction, chlorine removal and whether the filter itself releases unwanted substances into the water. Cost per litre and the ease of changing cartridges also count towards the final verdict.

That approach is valuable, but it has one limitation that is often overlooked: the test focuses on the water filter jug category. This is exactly where this guide goes deeper than most test round-ups.

2. What is the conclusion of the Consumentenbond?

The main message from the Consumentenbond is clear: Dutch tap water is safe and of excellent quality. It meets the legal standards and can be drunk without concern by young and old alike. For the average consumer, the organisation therefore sees no health-related need for a water filter.

At the same time, the organisation acknowledges that some filter jugs do make a difference. Brands such as Brita and ZeroWater score well on taste improvement and on reducing certain substances. The message is nuanced: a filter is not a medical must, but it can contribute to a more pleasant taste or less limescale, provided you replace the cartridge on time.

3. Which water filters does it test, and which not?

This is the most important insight in this article. The Consumentenbond test covers only one part of the market. There are roughly four categories of water filter, and most tests look only at the first:

• Water filter jugs: the familiar jugs from Brita, ZeroWater and Philips. This is the category the Consumentenbond tests in the lab. Capacity is limited: roughly 150 to 200 litres per cartridge.
• Gravity filters: large systems such as Berkey and Dutch equivalents. Rarely part of the jug test.
• Reverse osmosis (RO): under-sink systems that filter out almost everything, minerals included. A separate category.
• Inline under-sink filters: filters connected directly to the water pipe that treat all your drinking water.

For an inline filter, you rely instead on independent certifications such as NSF/ANSI. At PureFilter we see customers run into exactly this, looking for a test verdict on a filter type the organisation does not assess separately.

4. So why do people still choose a filter?

If tap water is safe, why is demand for water filters growing? Across the motives cited by the Consumentenbond and by other sources, four reasons stand out:

• Better taste: an activated carbon filter reduces chlorine and the swimming pool smell that comes with it, so the water tastes fresher.
• Less limescale: in hard water areas, filtration means less scale in the kettle and a softer taste.
• Peace of mind about newer substances: topics such as PFAS and microplastics have made people more aware. A certified filter adds extra reassurance, even though tap water is already safe.
• Less bottled water: switching from bottles to filtered tap water saves money and avoids plastic waste.

The organisation is equally candid about the downside: a filter that is not replaced on time can encourage bacterial growth and actually worsen water quality. Aggressive filtration methods also strip out useful minerals such as calcium and magnesium. That last point is exactly what remineralising filters address.

5. Points to keep in mind when reading the test

A test verdict is a tool, not an absolute truth. When you interpret the Consumentenbond test, bear the following in mind:

• The results sit behind a paywall: exact scores and methodology are visible only to subscribers. Websites claiming to share "the outcome" for free usually offer their own interpretation.
• Only jugs are tested: inline filters and most gravity filters fall outside the test. Do not draw conclusions about those categories from a jug test.
• Taste and limescale take centre stage, not every contaminant: the jug test focuses on everyday performance, not on full NSF verification for lead or PFAS, for example.
• Certification remains the gold standard: for the actual removal of substances, independent NSF/ANSI certificates (42, 53, 61 and 372) are the most reliable benchmark.

6. Comparison table: filter types side by side

To put the Consumentenbond jug test in perspective, here are the four main types of water filter side by side on the points that matter in practice:

The table makes clear why a single test verdict can mislead: a filter jug and an inline filter are not the same product category. They differ sharply in capacity, certification and whether they retain minerals.

7. Inline mineral filters

The category missing from virtually every jug test is the inline under-sink filter. The PureFilter Mineral+ is one such filter. It connects directly to the cold water pipe under your sink and treats all the water you drink and cook with, so you never have to refill a jug.

Two things set this filter apart from a standard filter jug. First, the purification: the PureFilter Mineral+ is tested by Equinox Labs, an independent laboratory (2026) and removes all 40 chemicals tested, from 75% to 99.97%, including chlorine, lead, PFAS, microplastics and nitrate. Where a jug test looks mainly at taste and limescale, an inline filter is judged first and foremost on those measured results.

Second, the minerals. Using Swedish Mineral Rock™ technology, the filter adds calcium, magnesium and potassium back into the water. At PureFilter we see customers who previously used an RO system or ZeroWater switch over precisely because they found the water tasted too "flat".

8. Buying advice: which filter suits you?

The right choice depends on what you are after and on your living situation:

• Just a fresher taste and the occasional glass of water? A tested filter jug from Brita or Philips will do. Watch the replacement intervals, or you lose the benefit.
• Plenty of water, coffee and cooking every day? An inline filter such as the PureFilter Mineral+ is more practical: no jug to refill and a cartridge that lasts up to 12 months for 1 to 3 people.
• Do you want filtered water that keeps its minerals? Choose a remineralising inline filter. Standard jugs and RO systems usually do not offer this.
• Renting a home where you cannot make changes? A filter jug is the safest choice; otherwise, talk to your landlord about a reversible inline installation.

For many Dutch households, the PureFilter Mineral+ strikes the balance between independently tested purification, ease of use and taste. Still unsure? See our comparison on best water filter or the explainer on the under-sink water filter.

9. Frequently asked questions about the Consumentenbond water filter test

10. Conclusion

The Consumentenbond water filter test delivers a valuable verdict on filter jugs and, above all, confirms one thing: Dutch tap water is safe and of high quality. A filter is therefore a choice about taste, limescale and peace of mind, not a medical necessity.

It is worth knowing what the test does not cover, though. Inline under-sink filters fall outside the jug test, even though for many households they are the most practical solution. For that category, independent NSF certifications are the most reliable benchmark. The PureFilter Mineral+ is tested by Equinox Labs, an independent laboratory (2026), removes all 40 chemicals tested, from 75% to 99.97% and, through Swedish Mineral Rock™, adds calcium, magnesium and potassium, with a cartridge life of up to 12 months for 1 to 3 people, up to 6 months for 4 or more.

Want to know more? Visit purefilter.nl or read our guides on buying a water filter and whether tap water is healthy.

Want to know more about the different systems? Discover which type of water filter you need.