Geneva
Switzerland · Europe
The water
135 mg/LHard
Source: SIG, Bilan eau potable (lake fed supply zone) · Official figure. Hardness counts dissolved calcium and magnesium in the water; it is the number your hair meets in the shower.
What hard water does to hair
Hair washed here picks up a mineral film that flattens shine and makes lengths catch and knot. Colour-treated hair shows it first. Chelating (detox) washes belong in the rhythm, not as an occasional rescue.
The washing routine for Geneva
Plan on a chelating (detox) wash every fourth wash or so, gentle shampoo for the washes between, and thorough conditioning each time. The rhythm, kept up, prevents the dullness and tangling this water otherwise causes.
Climate, from recent records (Open-Meteo, ERA5 2015-2024): July is the warmest month, averaging 27°C by day, and humidity peaks in November at about 85% on average. In the humid months, frizz is the main event; anti-humidity styling matters more than wash frequency.
Local note: Most of Geneva is supplied from the lake at 134 to 135 mg/L; groundwater (nappe) fed sectors run harder, 183 to 212 mg/L..
Plugs and power for your tools
Sockets: Type C and J. Supply: 230 V, 50 Hz.
A 120 V only dryer or styler (North American) will burn out on this supply, and a plug adapter does not change voltage. Check the label for dual voltage (100-240 V) before you plug in.
Plug, voltage and frequency: IEC World Plugs and national standards.
Plan Geneva properly
The trip planner turns this water profile into a wash plan for your hair type, a chosen kit and a packing list, month by month.