Is filtering tap water necessary in the Netherlands?

The short answer: no

Dutch tap water is among the best in the world and meets the statutory standards. The Dutch public health institute RIVM and the water companies say it without beating about the bush: “a home filter is not necessary in the Netherlands”. A shop that sells water filters and therefore opens with that answer is not trying to pull the wool over your eyes. That is precisely why it is stated here.

Why people filter anyway

The honest reasons from practice: an improvement in taste (contaminants and therefore taste differ per region), the wish to have an extra buffer of one's own on top of the standards set by the government, old internal pipework in the house, etc. or simply: staying in control yourself. The discussion about substances such as PFAS, microplastics and the increase in medicine residues and pesticides also shows that standards are not an end point but a snapshot; those who do not want to wait for that, add their own filtering.

If you do it, make it measurable

Choose a water filter whose manufacturer shows per substance what it does, in test reports with reduction percentages and a test standard alongside. Avoid anything that sells with fear or with promises without figures. And work out the cost per year in advance: a filter that you do not maintain or replace can be worse than no filter.