Water filter test Consumers' Association: what does the association test?

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

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

Dutch tap water is among the most strictly controlled in the world. According to industry association Vewin, our drinking water complies with the strictest European standards and is checked for hundreds of substances annually. Nevertheless, a growing number of households opt for additional filtering. This begins with understanding what a test like that of the Consumentenbond does and does not say.

1. What does the Consumentenbond test in water filters?

The Consumentenbond's strength lies in actually measuring a filter's performance in a lab, rather than relying on manufacturer claims. The bond examines factors such as taste improvement, limescale reduction, chlorine removal, and whether the filter releases unwanted substances into the water. The cost per liter and ease of filter changes also contribute to the final verdict.

This approach is valuable, but it has one limitation that is often overlooked: the test focuses on the category of water filter pitchers. This is precisely where this guide delves deeper than most test overviews.

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 legal standards and can be drunk without worries by young and old. For the average consumer, a water filter is therefore not a necessity from a health perspective, according to the bond.

At the same time, the bond acknowledges that some filter jugs do make a difference. Brands like Brita and ZeroWater score well on taste improvement and 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 the filter is replaced in time.

3. Which water filters does the bond test and which ones not?

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

• Water filter pitchers: the well-known pitchers from Brita, ZeroWater, and Philips. This is the category that the Consumentenbond tests in the lab. Capacity is limited: approximately 150 to 200 liters per cartridge.
• Gravity filters: large systems such as Berkey and Dutch alternatives. Rarely part of the pitcher test.
• Reverse osmosis (RO): under-sink installations that filter out almost everything, including minerals. A separate category.
• Inline under-sink filters: filters that are connected directly to the water supply and filter all drinking water. This category falls outside the standard Consumentenbond pitcher test.

In other words: if you are looking for the best inline filter, the Consumentenbond test does not provide a direct judgment on it. For that category, you rely on independent certifications such as NSF/ANSI. At PureFilter, we see that customers run into this exact issue; they seek a test verdict for a filter type that the bond does not assess separately.

4. Why do people still choose a filter?

If tap water is safe, why is the demand for water filters growing? From the motives cited by both the Consumentenbond and other sources, four reasons emerge:

• Better taste: an activated carbon filter reduces chlorine and its associated swimming pool smell, making water taste fresher.
• Less limescale: in areas with hard water, filtering leads to less limescale buildup in kettles and a softer taste.
• Peace of mind regarding new substances: topics such as PFAS and microplastics make people more aware. A certified filter provides additional assurance, even though tap water is already safe.
• Less bottled water: switching from bottled to filtered tap water saves money and prevents plastic waste.

The downside is honestly mentioned by the bond: a filter that is not replaced in time can promote bacterial growth and actually worsen water quality. Aggressive filtering methods also remove beneficial minerals such as calcium and magnesium. This last point is precisely what remineralizing filters address.

5. Points of attention when reading the test

A test judgment is a tool, not an absolute truth. When interpreting the Consumentenbond test, consider the following:

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

6. Comparison table: filter types side by side

To put the Consumentenbond pitcher test into perspective, we compare the four main types of water filters based on the points that matter in practice:

The table clearly shows why a single test judgment can be misleading: a filter pitcher and an inline filter are not the same product category. They differ significantly in capacity, certification, and whether they retain minerals.

7. Where the Consumentenbond test stops: inline mineral filters

The category missing from almost every pitcher test is the inline under-sink filter. The PureFilter Mineral+ is such a filter. It connects directly to the cold water line under your sink and filters all the water you drink and cook with, without having to refill a pitcher every time.

Two things make this filter different from a standard filter pitcher. Firstly, purification: the PureFilter Mineral+ is independently certified to NSF 42, 53, 61, and 372 and removes more than 100 contaminants, including chlorine, lead, PFAS, microplastics, pharmaceutical residues, and nitrates. While a pitcher test primarily looks at taste and limescale, for an inline filter, these certified performances are central.

Secondly, the minerals. Through Swedish Mineral Rock™ technology, the filter adds calcium, magnesium, and potassium back into the water. This addresses precisely the disadvantage mentioned by the Consumentenbond regarding aggressive filtering – the loss of beneficial minerals – turning it into an advantage. At PureFilter, we see that customers who previously had an RO system or ZeroWater switch because they found the water tasted too "stripped."

8. Buying advice: which filter is right for you?

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

• Just a fresher taste and an occasional glass of water? A tested filter pitcher from Brita or Philips will suffice. Pay attention to replacement intervals, otherwise you lose the benefit.
• Daily much water, coffee and cooking? Then an inline filter like the PureFilter Mineral+ is more practical: no need to refill a pitcher and up to 20,000 liters per cartridge.
• Do you want filtered water while retaining minerals? Choose a remineralizing inline filter. Standard pitchers and RO systems usually do not offer this.
• Rental property where you cannot modify anything? A filter pitcher is the safest choice; otherwise, consult with your landlord about a reversible inline installation.

For many Dutch households, the PureFilter Mineral+ strikes the balance between certified purification, ease of use, and taste. Still in doubt? Check out our comparison on best water filter or the explanation about the under-sink water filter.

9. Frequently asked questions about the Consumentenbond water filter test

10. Conclusion

The Consumentenbond's water filter test provides a valuable assessment of filter jugs and primarily confirms one thing: Dutch tap water is safe and of high quality. A filter is therefore a choice for taste, lime, and peace of mind, not a medical necessity.

It is important to know what the test does not cover. Inline under-sink filters fall outside the jug test, while for many households, they are the most practical solution. For this category, independent NSF certifications are the most reliable measure. The PureFilter Mineral+ is certified to NSF 42, 53, 61, and 372, removes more than 100 contaminants, and adds calcium, magnesium, and potassium via Swedish Mineral Rock™, with a capacity of 15,000 to 20,000 liters per cartridge.

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