Water hardness in Lugano
11.9 °fH moderately hard
Tap water in Lugano is moderately hard: 11.9 °fH (119 mg/L · 7 gpg · 6.7 °dH).
Source: Aziende Industriali di Lugano (AIL) SA (via SVGW trinkwasser.ch) (2025) · data checked 2026-10-21
Range across supply zones: 26–183 mg/L.
In Ticino, drinking water comes from springs, groundwater and in part the lake, in an area of crystalline rock that gives soft water. Aziende Industriali di Lugano (AIL) SA reports a hardness of 119.0 mg/L CaCO₃, with values from 26.0 to 183.0 mg/L depending on the address. Scale shows up over time on kettles and shower screens, and regular descaling is usually enough.
In der Schweiz wird meist in °fH angegeben (1 °fH = 0,56 °dH).
Water data
| Total hardness | 11.9 °fH |
|---|---|
| Utility | Aziende Industriali di Lugano (AIL) SA |
How Lugano compares
- Tap water in Lugano is 55 % softer than the median of the 650 cities we track in Switzerland (26.7 °fH).
- By hardness it ranks 617 of 650 in Switzerland (1 = hardest); 5 % of these cities have softer water.
- In TI it is number 7 of 16 cities; the regional median is 10.9 °fH.
- Nearest city with clearly softer water: Massagno, 1 km away (4.1 °fH).
- Nearest city with clearly harder water: Riva San Vitale, 12 km away (30 °fH).
Ranking of the hardest and softest water in Switzerland →
What it means at home
- Visible kettle scale every few weeks; vinegar or citric acid is enough.
- Water heater and washing machine: some long-term scale; a scale inhibitor slows it.
- Dishwasher: medium salt setting.
- Softener optional; pays off mainly with a gas boiler or tankless heater.
How much salt will you use for softening?
Optional. A scale inhibitor or a small softener protects the heater; soap savings are modest.
Descale a coffee machine or kettle about every 3 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Lugano
| Brand | Setting for this water |
|---|---|
| Bosch | H01 |
| Miele | 7 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| Hoover | S1 |
| LG | H1 |
From each brand's manual for the model family named in the source; your model may differ, so check its manual. All brands and how to change the setting →
FAQ
Is Lugano water hard or soft?
It is moderately hard: 119 mg/L as CaCO₃ (7 gpg, 6.7 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Lugano safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. In der Schweiz wird meist in °fH angegeben (1 °fH = 0,56 °dH).
How many grains per gallon is Lugano water?
7 gpg, equal to 6.7 °dH, 11.9 °fH or 119 mg/L calcium carbonate.
What dishwasher salt setting should I use in Lugano?
For 119 mg/L (6.7 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Lugano?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: Aziende Industriali di Lugano (AIL) SA (via SVGW trinkwasser.ch) (2025). Method: figure published by the water supplier. Aziende Industriali di Lugano (AIL) SA (via SVGW trinkwasser.ch) · Outdated figure? Tell us