Have you just returned from vacation? Then let the taps run for a minute before you drink the water or take a shower.
Loss of quality Vitens advises this. Drinking water that has stood still in the pipes for too long no longer has the desired quality.
More dangers
At high temperatures, legionelle bacteria can even develop in the water. You can even get sick if you inhale contaminated mist droplets while taking a shower.
Let the shower run as well So let the water from the shower run through for a while. Hold the shower head in a bucket of water so that no mist droplets can form
Do you let the water run through after your holiday, or do you not think about it?