What are the largest water companies in Switzerland?

- Groupe E: Groupe E is the largest utility company in Switzerland. It provides electricity, gas, and water to over 1 million customers in the canton of Valais and parts of the cantons of Vaud and Fribourg.

- Wynentaler Wasserversorgung: Wynentaler Wasserversorgung is a water supply company in the canton of Aargau. It supplies water to over 100,000 customers in the Wynental region.

- Wasserversorgung der Stadt Zürich: Wasserversorgung der Stadt Zürich is the water supply company for the city of Zurich. It supplies water to over 400,000 customers in the city and surrounding areas.

- Genossenschaft Wasserversorgung Zug: Genossenschaft Wasserversorgung Zug is a water supply company in the canton of Zug. It supplies water to over 90,000 customers in the canton.

- EWL Energie Wasser Luzern: EWL Energie Wasser Luzern is a utility company in the canton of Lucerne. It provides electricity, gas, and water to over 100,000 customers in the canton.