Protecting the water supply
Toward a reliable and affordable distribution of water
The Municipality takes care of the capture, treatment, distribution and protection of water, thus ensuring that the citizens of Lausanne – and of the 70 other municipalities in its agglomeration – have access to high quality water at a low price: CHF 2.10 per m3 (i.e. 1,000 litres). In other words, it costs 1,000 times less than bottled water.
Water is captured at a number of sources: Lake Léman (58%), 120 springs in the Gros-de-Vaud region, from the foothills of the Jura and the Préalpes (27%) and from the Lake of Bret (15%).
Water and sustainable development
Water is the resource human beings need most of all, as do plants and animals. Seventy percent of the human body consists of water, and each one of us uses around 160 litres a day, around the house and for our own personal hygiene.
Protecting and maintaining the water supply are fundamental to any durable, affordable water distribution network. Consumers, farmers, industrial firms and artisans are all encouraged to use it sparingly – so that everyone has access to it for a long time to come.
Capture and maintenance of the supply, ensuring access to high quality water
Environmental management and health concerns
eauservice, the municipal department responsible for distributing Lausanne's drinking water, is working towards its certification (ISO 14'001) as part of a commitment to improving their management of the environment and the water supply.
In order to minimize risks to its employees and to the environment, they have drawn up an inventory of potential threats. The supply is being managed both qualitatively and quantitatively, to ensure the distribution of drinking water of impeccable quality.
The springs of the Pays-d'Enhaut and energy savings
Since 1901 the Pays-d'Enhaut region in the Vaud Préalpes has provided 15% of the water used by Lausanne and its agglomeration.
From the valleys of the Etivaz (1,400 metres above sea level), the water is transported by gravity alone, saving several million KWh of electricity, which would be the cost of pumping the same volumes of water from Lake Léman.
Water from the Pays-d'Enhaut and Les Avants is making it possible to produce "green" electricity, which is done at the Sonzier power plant.
Protecting the water supply and our health
Our drinking water is analyzed constantly. The collection and treatment of waste water at the purification plant (STEP) make it possible to protect Lake Léman and its animal life, to enjoy quality bathing water, and to guarantee an essential source of water.
The development of the separate network makes it possible to separate waste water taken by the sewers to the STEP from fresh water (rainwater, fountain water, etc.), directed straight to the rivers and the lake.
For five years, the City of Lausanne has taken part in World Water Day, held on March 22.
Service de l'eau
Rue de Genève
Case postale 7416
Phone +41 21 315 85 30
Fax +41 21 315 80 05