Almost without exception, drinking water in Germany is of good quality. Tap water in Germany is also the most heavily controlled foodstuff. Lime and chlorine can still interfere or even become unpleasant when drinking tap water. With a carbon filter/carbon filter, you can filter chlorine and lime out of drinking water. Legionella can multiply in combination with high temperatures and prolonged unused water pipes. If legionella is suspected, the drinking fountain must be cleaned alkali/chemically or with hot water steam.