Water hardness in Locarno
2 °fH soft
Tap water in Locarno is soft: 2 °fH (20 mg/L · 1.2 gpg · 1.1 °dH).
Source: Città di Locarno, zone sheet Monti (Azienda acqua potabile) (2020) · data checked 2026-11-14
This figure is over 3 years old; hardness may have changed.
The only published figure for Locarno is a 2020 sheet for the Monti zone from the municipal water utility: 20 mg/L CaCO₃, which is soft. It covers one zone, is several years old, and is marked stale here. Other parts of the town may differ, so treat it as a rough guide and ask the utility before choosing treatment equipment.
In der Schweiz wird meist in °fH angegeben (1 °fH = 0,56 °dH).
Water data
| Total hardness | 2 °fH |
|---|---|
| Utility | Azienda acqua potabile di Locarno (Città di Locarno) |
How Locarno compares
- Tap water in Locarno is 93 % softer than the median of the 650 cities we track in Switzerland (26.7 °fH).
- By hardness it ranks 648 of 650 in Switzerland (1 = hardest); 0 % of these cities have softer water.
- In TI it is number 16 of 16 cities; the regional median is 10.9 °fH.
- Nearest city with clearly harder water: Bellinzona, 17 km away (3.1 °fH).
Ranking of the hardest and softest water in Switzerland →
What it means at home
- Little or no limescale in kettles, water heaters or washing machines.
- Soap lathers easily; water does not dry skin or hair.
- Dishwasher: salt setting at minimum or off.
- No softener needed; a jug filter only changes taste.
How much salt will you use for softening?
No. Water this soft does not need softening.
Descale a coffee machine or kettle about every 6 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Locarno
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 1 °dH |
| AEG / Electrolux | 1 |
| Beko | 1st |
| Hoover | S0 |
| LG | H0 |
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 Locarno water hard or soft?
It is soft: 20 mg/L as CaCO₃ (1.2 gpg, 1.1 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Locarno 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 Locarno water?
1.2 gpg, equal to 1.1 °dH, 2 °fH or 20 mg/L calcium carbonate.
What dishwasher salt setting should I use in Locarno?
For 20 mg/L (1.1 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Locarno?
No. With soft water a softener adds nothing.
Source
Source: Città di Locarno, zone sheet Monti (Azienda acqua potabile) (2020). Method: older figure, source currently unavailable. Città di Locarno, zone sheet Monti (Azienda acqua potabile) · Outdated figure? Tell us