How hard is Zurich’s water?
The City of Zurich reports drinking-water hardness of 14–19 °fH and describes its water as relatively low in limescale. Calling all Zurich water hard would therefore be misleading. This figure concerns the city supply; check your own supplier for another municipality.
Drying droplets can still leave mineral marks. When removing limescale in Zurich, the surface and its care instructions matter more than choosing a stronger product by default.
Further reading
Identify the surface first
| Area | A gentle starting point |
|---|---|
| Coated tap | Check the maker’s care guidance and use an approved soft cloth. |
| Glass or shower screen | Check the coating and permitted cleaner; remove water after use. |
| Marble, limestone or unidentified stone | Do not apply acid experimentally; check appropriate stone care. |
| Grout and seals | Check product compatibility and contact time; avoid forceful scrubbing. |
Further reading
There is no universal descaling recipe
Vinegar, citric acid and abrasive pastes do not suit every finish. For example, Hansgrohe recommends mild citric-acid-based cleaners for its own products; that does not establish compatibility with other brands or every material.
Choose a product expressly suitable for the surface, follow the dose and contact time on its label and use products individually. Never mix cleaners. Check care requirements first if the finish is damaged or unknown.
Treat kettles and coffee machines individually
Consult the appliance manual: the descaler, dose, cycle and rinsing process may vary by model. Do not run the same homemade solution through every appliance. Use maintenance instructions and device alerts to plan care.
Reduce new marks and describe difficult areas
- Remove droplets from suitable surfaces with a soft cloth.
- Squeegee shower glass after use and repeat the approved care routine.
- Mention stubborn deposits, damaged finishes or delicate stone before requesting cleaning.
Further reading