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Trinkwasser für Zürich – Besuch des Reservoirs Lyren

Guided tour (in German)

The water supply of the city of Zurich provides drinking water for about one million people in the city and the surrounding municipalities. 70% of the water comes from Lake Zurich, half of the rest from groundwater and spring water. Lake water works and groundwater works are connected to the large reservoirs by a ring tunnel, including the Lyren reservoir in Altstetter Wald.

Riccarda Engi and Hans Gonella from Zurich City Water Supply will tell you where the water in Zurich households comes from and answer all your questions about drinking water.

Afterwards you will visit the largest drinking water reservoir in Switzerland. It comprises four chambers with a total capacity of 60,000 cubic metres. One of them can be entered via a gallery.

In addition, the Lyren reservoir contains the cavern where the drinking water tunnel leads from the Moos lake waterworks in Wollishofen to the Hardhof groundwater works. A lift takes you to the cavern 123 metres below ground, the lowest accessible point in Zurich.

Overview of the programme

  • Arrival at the entrance to the Lyren reservoir
  • Welcome and introduction to Zurich’s water supply system
  • Visit gallery drinking water chamber
  • Visit to cavern with lift access (lowest accessible point in Zurich, 123 metres below ground)

How to find Lyren