The amount of lime in tap water varies from region to region. Via this link, you can find a map that shows how hard the water in your municipality is.
In some regions (e.g. the northern edge of Brussels, certain parts of Leuven), there is quite a lot of lime in tap water, in most of Flanders the amount of lime is average and in some regions in Limburg the water is very soft (so low lime content).
There is nothing unhealthy about lime in water. On the contrary, calcium is a necessary component of a healthy diet, and drinking water is a good way to ingest calcium. It is true that lime influences the taste. Some people don't like water with a lot of lime. In that case, you can use the Robi-soft filter perfectly filter a large part of the lime from the water.
Robi is een slimme waterfilter die je eenvoudig kan aansluiten op je bestaande kraan.