Water hardness in Santena
18 °fH very hard
Tap water in Santena is very hard: 18 °fH (180 mg/L · 10.5 gpg · 10.1 °dH).
Source: SMAT Torino, monitoraggio acque (valori medi), 2026 H1 (2026-06) · data checked 2026-10-19
SMAT, the utility serving the Turin area, publishes half-year mean values for Santena. For the first half of 2026 the calculated hardness is 180.3 mg/L CaCO₃, which falls in the very hard band. Neighbouring towns in the same network differ a lot, from 111.6 mg/L at Castiglione Torinese to 346.3 mg/L at Cambiano, so a nearby figure is not a safe guide for your address. We have not checked which sources supply Santena, and expect limescale on heating elements.
Italian utilities report °f (French degrees); D.Lgs. 31/2001 recommends 15–50 °f.
Water data
| Total hardness | 18 °fH |
|---|
How Santena compares
- Tap water in Santena is 15 % softer than the median of the 629 cities we track in Italy (21.2 °fH).
- By hardness it ranks 392 of 629 in Italy (1 = hardest); 38 % of these cities have softer water.
- In Piemonte it is number 70 of 242 cities; the regional median is 12.3 °fH.
- Nearest city with clearly softer water: Castiglione Torinese, 19 km away (11.2 °fH).
- Nearest city with clearly harder water: Cambiano, 3 km away (34.6 °fH).
Ranking of the hardest and softest water in Italy →
What it means at home
- Severe scale: heater elements and washing-machine heaters fail early.
- Detergent use is very high; taps and screens coat within days.
- Dishwasher at maximum salt setting.
- An ion-exchange softener is practically essential; RO for drinking water.
How much salt will you use for softening?
Yes. At this hardness a softener pays for itself through appliance life and detergent.
Descale a coffee machine or kettle about every 1 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Santena
| Brand | Setting for this water |
|---|---|
| Bosch | H02 |
| Miele | 10 °dH |
| AEG / Electrolux | 2 |
| Beko | 3rd |
| Hoover | S2 |
| LG | H2 |
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 Santena water hard or soft?
It is very hard: 180 mg/L as CaCO₃ (10.5 gpg, 10.1 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Santena safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Italian utilities report °f (French degrees); D.Lgs. 31/2001 recommends 15–50 °f.
How many grains per gallon is Santena water?
10.5 gpg, equal to 10.1 °dH, 18 °fH or 180 mg/L calcium carbonate.
What dishwasher salt setting should I use in Santena?
For 180 mg/L (10.1 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Santena?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: SMAT Torino, monitoraggio acque (valori medi), 2026 H1 (2026-06). Method: computed from supplier's calcium and magnesium. SMAT Torino, monitoraggio acque (valori medi), 2026 H1 · Outdated figure? Tell us