From Sewage to Clean WaterZürich. Your sustainable city trip.

See how the experts from ERZ, Zurich Disposal and Recycling Services, in the Sewage Treatment Plant of Werdhoelzli, cleanse between 150,000 and 500,000 cubic meters of sewage water on a daily basis and see where it’s released back into the Limmat River as clean water. In this four part cleansing process, you will witness the solid and solute polluted matter being taken out of the sewage water and learn how the residue of that matter is transformed into something ecological and useful so that our water cycle remains clean.

Highlights Included Not Included

Experience a fountain of information, emotions and entertainment

Smell a plethora of scents

See a display of all the strange things that have been fished out the sewage water

Ease your body and mind by playing with the process of our sewage treatment



Travel to and from departure location

Food & Beverages



Time & Duration

Start Time
  • Date: year-round, daily
  • Departure: on request

2 h

Number of Participants 5 – 25 (starting from children in 4th grade)


Public Tour

Public Tour

This tour is available in these languages
German, English

Additional Information

No parking available

Operator: Partner company