Transparent and in your control
Privacy
This page explains which data Seepegel processes, which settings remain in your browser and when external services are used.
Updated: 4 November 2026
The essentials
You can use Seepegel without an account.
Favourites, recently viewed waters and display settings stay in your browser.
Use “Cookie settings” to choose whether Google Analytics may run. The Android app has separate advertising choices.
Data controller
Mächler Media, Patrick Mächler, Hauptstrasse 63, 9434 Au SG, Switzerland (see imprint).
[email protected]Data when you visit the website
To display Seepegel on your device, our server receives your IP address, the time of your visit, the requested page, the previous website and information about your browser and device. We use this information to operate, troubleshoot and protect the website, not to build advertising profiles. To limit excessive data requests, we also temporarily use an identifier derived from the IP address. It is deleted within 24 hours and is not used for advertising.
Cookies and local storage
Your browser stores small files and settings so that features such as language and favourites remain available on your next visit. We do not use these convenience settings for advertising.
- Language
- A cookie remembers your chosen language. It contains no personal user identifier.
- Privacy choice
- Your choice for visitor statistics and Google Analytics is saved so you are not asked on every visit. You can change it at any time in “Cookie settings”.
- Convenience features
- Your browser remembers favourites, light/dark appearance and local alarm settings. For recently viewed waters and changes since your last visit, it stores up to twelve waters with the visit time, reading and station. Viewing a water does not make it a favourite. It also saves up to five selected search results and up to six lakes in the comparison tray with their names. These lists are not sent to Seepegel as a personal profile. Loading pages, search results and comparisons still requires requests to our server. You can delete saved information through your browser’s website data settings. A dismissed app promotion stays hidden for 30 days. When you open Google Play, the link identifies which app promotion you followed and, where applicable, your selected water, but includes no personal identifier.
- Offline feature
- Only an offline notice and the app icon are saved for use without internet. Current water-level and weather pages are not available offline.
Seepegel Android app
The Android app uses the same current content as seepegel.ch and adds native notifications and a home-screen widget. No account or sign-in is required.
- Loading readings
- The app retrieves current content and readings from the Seepegel server. The same technically necessary connection data as for a website request is processed. For its own reach measurement, the app sends only a fixed broad category such as Lakes, Rivers, Alerts or Detail page and the app language. Specific lakes, stations, thresholds, device identifiers and individual usage histories are not stored for this purpose.
- Data on the device
- Selected lakes, language, appearance, completed onboarding, consent choice and alert settings remain in the device's local app storage. Favourites and alerts can be changed or deleted in the app at any time; consent to Google Analytics can be withdrawn under ‘More’.
- Home-screen widget
- For each widget, the selected lake and language are stored locally. The widget retrieves current public readings from seepegel.ch approximately every 30 minutes and after a manual refresh. It sends no contacts, advertising ID, location or other personal information.
- Permissions
- The app needs internet access for current readings. Android's notification permission is requested only when you activate an alert. Seepegel does not request access to location, contacts, photos, camera or microphone.
- Google Play and app services
- The app is installed and updated through Google Play. Under its own terms, Google processes account, device, download, diagnostic and security data. Google Analytics for Firebase analyses app usage only after your voluntary consent, which you can change under “More”. App advertising is provided through Google AdMob; the introduction and widgets contain no ads. Google receives IP addresses, ad interactions, diagnostic information and technical identifiers from the included software for delivery, measurement and fraud prevention. The Android advertising ID is not accessed. You make your advertising choice in Google’s privacy dialog and can reopen it under “More”. This is separate from Analytics consent.
Contribute
We store the text, category, date, map point and relevant page. A name is optional and public after approval. Unpublished contributions are removed after 90 days. Polls use a random browser identifier (30-day cookie) only for voting, with no advertising or cross-site tracking. IP addresses are temporarily hashed to limit submissions. Request removal at [email protected].
Lake photographs and photo credits
When you submit a photograph, we store the image resized for this website, your supplied public name, a caption and an optional date taken. We also record when and which publication permission you accepted. A first name or pen name is enough; an email address is not required. You can optionally add a public location with the viewing direction and a short photo story.
Every photograph is reviewed before publication. Only after approval will the image, name and caption appear in the gallery, on its lake or river page and, where relevant, bathing-place page (including as a cover image) and potentially as photo of the week. Processing takes place on our servers. The original is not retained; embedded location and camera metadata are removed. Unapproved submissions are deleted within 30 days of receipt. These optional details are also reviewed and published with the photo. Editors may pair suitable, dated photographs for a comparison over time. With explicit permission for this use, we may also show the approved photo, public name, description and optional photo details in the Seepegel app. Earlier website permissions are not automatically extended to the app. Withdrawal applies to our future publication on the website and app; we cannot recall every copy already saved on other people’s devices.
Publication is voluntary. You retain your image rights and may withdraw publication permission for the future. To request removal, email [email protected] identifying the photograph or its reference number. Published photographs remain stored until removal. Recognisable people must also have agreed to publication.
External services and recipients
Some features use other providers’ services. Loading them sends information such as your IP address to those providers. The following sections explain when this happens and what choices you have.
Our own visitor statistics
Regardless of your statistics choice, we count page views, broad app areas and use of app links and ads as totals. Recognised bots are counted separately. Short-term five-minute totals are deleted after 72 hours. These counters store no IP addresses or visitor identifiers. Only with your voluntary statistics consent do we recognise your browser on the website: a random identifier in local browser storage lasts up to 90 days. Another identifier groups page views into a session; a new session starts after 30 minutes without a page view. Our server stores hashed identifiers, pages visited without URL parameters, language, broad device type and timestamp for up to 90 days, with hourly cleanup. This lets us analyse individual browser visits and page sequences, without identifying your name or identity. We store no IP addresses, full browser details or full referring addresses for this purpose and do not merge this data with Google Analytics. You can withdraw consent for future collection at any time in Cookie settings. This removes the local visitor identifier; existing events are deleted no later than the stated retention period.
Google Analytics
With your consent, Google Analytics helps us understand which pages and app features are used. We use Google Analytics 4 on the website and Google Analytics for Firebase in the Android app. The provider is Google Ireland Limited, Gordon House, Barrow Street, Dublin 4, Ireland. Data includes pages and app sections viewed, interactions, an app installation identifier generated by Firebase, the approximate region and information about the browser, app and device. Google derives the general region from the IP address and discards the address before logging for access from Switzerland, the EU and the United Kingdom. Further processing may take place in the USA. The Google Privacy Policy applies.
Google Analytics starts on the website and in the app only after your consent. Withdrawing consent on the website stops collection and removes Analytics cookies. Google Signals and advertising personalisation for Analytics are disabled. Analytics cookies are retained for no more than six months.
Consent is voluntary and can be withdrawn at any time for the future:
Map services
Displaying an interactive map loads map data from OpenFreeMap. Enabling official flood warnings also loads data from swisstopo. These providers receive your IP address and details of the requested map, but no Seepegel account or profile data. In the Android app, the map loads only after you confirm the map notice. The app does not access your device location for this.
Notifications and water-level alerts
Website notifications are enabled only at your request and with browser permission. We store your browser’s technical delivery address, keys needed for secure delivery, selected lake, language and alarm thresholds. Unsubscribing deletes that subscription from our server. Android alarm rules are stored on your device. The app checks readings regularly and notifies you when a threshold crossing is confirmed. You can change or delete these rules at any time.
Website and app advertising
This website no longer integrates external advertising networks. You can remove third-party cookies stored during earlier visits in your browser settings. The Android app continues to use Google AdMob independently with its own settings.
Retention
Your settings stay in your browser until you change or delete them. Notification subscriptions remain until you unsubscribe. We keep website access records only as long as needed to run the service, resolve problems and maintain security. Longer retention applies only where required by law or to investigate specific security incidents. Data held by Google Analytics is subject to the retention periods set for that service.
Your rights
Under the Swiss Data Protection Act, you may in particular request access, correction, deletion or delivery of your personal data and object to processing. Contact the controller named in the imprint. Further information is available from the Federal Data Protection and Information Commissioner.
Changes to this policy
We update this policy when features, services or legal requirements change. The current version published here applies.

