About the portal

Portal content

The Federal Office for the Environment (FOEN) is the publisher of the “Hydrological data and forecasts” Web site. This portal provides current and past hydrological data on rivers, lakes and groundwater in Switzerland as well as forecasts and flood warnings.


Published data

Current and past monitoring data are published on the portal.

Current monitoring data (latest measurements and charts) are transmitted directly from the FOEN’s hydrometric stations. The data are raw and not verified prior to publication. For that reason, they may contain errors. Raw data and forecast values are each published in local time (summer / winter time).

Past data have been subjected to a plausibility check and corrected, where necessary. They are published in winter time.

The FOEN strives to publish correct data. However, it cannot be held liable for incorrect data. For more information, see the “Terms and conditions”:
Terms and conditions


Further information

The federal government publishes public information on natural hazard warnings on its natural hazards portal:
The federal government’s natural hazards portal www.natural-hazards.ch/

Other current data used by experts and crisis teams to manage events can be obtained from GIN, the Common information platform for natural hazards.
Common information platform for natural hazards (GIN)

Background information on the FOEN’s activities, monitoring networks and methods in connection with water can be found on the FOEN's Web site:
Federal Office for the Environment (FOEN): Topic Water


Web analytics

To identify trends and improve the quality of our online services, a few non-personal items of usage data, such as your IP address, the website you last visited, which browser you are using, date and time, etc., are recorded ("Google Analytics"). The data is anonymized.

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IP anonymisation is enabled on this website. This means that the IP addresses transferred by Google Analytics to its server in order to monitor the use made by visitors to www.naturgefahren.ch are automatically and immediately shortened by deleting the last three numbers of the IP address.

Google will use this information to evaluate your use of the site, to compile reports on site activity for the website owner and to provide other services in relation with activity on the site and internet use. Google may release this information to third parties, including the owner of this website, if there is a legal obligation to do so or if such third parties process data on behalf of Google. Google will not link your IP address with any other data held by Google.

You can disable the use of cookies by selecting the appropriate settings on your browser. However, if you do so this may prevent you from using some of the functions on our site. Furthermore, you can prevent Google from compiling and using the data generated by cookies in relation to your use of the site (including your IP address) by downloading and installing the browser plugin at the following link:

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By using this internet site, you expressly agree to the processing of your data by Google according to the terms and purposes described above.