Drinking tap water is generally harmless. There are several reasons for this: On the one hand, the quality of tap water in Germany is constantly monitored; The Drinking Water Ordinance, which has been in force since 2001, specifies which quality values must be achieved. Don’t be put off by the fact that the water flows through meters of old pipes. Tap water contains neither sugar nor protein and the pipes are completely dark; anything but good conditions for the formation of germs.
Theoretically, there is a risk of dissolved lead from lead pipes; However, the installation of lead pipes for drinking water supply has been prohibited throughout Germany since 1973. By the end of 2013, all lead pipes that transported drinking water had to be replaced with harmless pipes, which is why consumers today hardly have to worry about dissolved lead in tap water.
Note for vacationers: Tap water quality can vary greatly from country to country and sometimes be so low that there is a risk to health; When you are abroad, it is essential that you first find out whether you can drink the local tap water and if in doubt, only drink bottled mineral water!