Where does tap water come from?

A distinction is made between groundwater and surface water, depending on its origin. 

Groundwater is water from precipitation that has seeped into the ground. It is collected in different ways: 

from springs; 

  • via draining galleries; 
  • by drilling a well down to the water table; 
  • by pumping from old mines where water has accumulated. 
  • Surface water is drawn from rivers, canals, streams, lakes and reservoirs. 

You will find the exact source of the water you consume on the fourth page of your adjustment bill.  

More information:

Where does your water come from?

Treatment plants