Water hardness in Bolzano
14.5 °fH hard
Tap water in Bolzano is hard: 14.5 °fH (145 mg/L · 8.5 gpg · 8.1 °dH).
Source: SEAB Bozner Wasser, Wasserhärte page (range text) with per-point analysis PDFs (2025-12) · data checked 2026-10-20
Range across supply zones: 130–160 mg/L.
SEAB, the municipal utility for Bolzano, states a range of 13 to 16 °F (130 to 160 mg/L CaCO₃) and says the value varies with the sampling point. The page itself is undated, so we date the entry from a linked lab report of December 2025. We show the range rather than one citywide figure, and we have not confirmed which sources supply each district. This is moderately hard water, so scale builds up in kettles and boilers over time.
Italian utilities report °f (French degrees); D.Lgs. 31/2001 recommends 15–50 °f.
Water data
| Total hardness | 14.5 °fH |
|---|---|
| Utility | SEAB (Bozner Wasser, Stadtwerke Bozen) |
How Bolzano compares
- Tap water in Bolzano is 32 % softer than the median of the 629 cities we track in Italy (21.2 °fH).
- By hardness it ranks 451 of 629 in Italy (1 = hardest); 28 % of these cities have softer water.
- In Trentino-Alto Adige it is number 4 of 5 cities; the regional median is 16.4 °fH.
- Nearest city with clearly harder water: Mori, 76 km away (22.1 °fH).
Ranking of the hardest and softest water in Italy →
What it means at home
- Fast scale on taps, shower screens and kettle; white spots on glassware.
- Water heater: efficiency loss and element failures within years if unprotected.
- Dry skin and dull hair after showering are common.
- Softener recommended; jug or reverse osmosis for drinking.
How much salt will you use for softening?
Recommended, especially with a heater or boiler: scale cuts efficiency and shortens its life.
Descale a coffee machine or kettle about every 2 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Bolzano
| Brand | Setting for this water |
|---|---|
| Bosch | H01 |
| Miele | 8 °dH |
| AEG / Electrolux | 2 |
| Beko | 3rd |
| Hoover | S1 |
| 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 Bolzano water hard or soft?
It is hard: 145 mg/L as CaCO₃ (8.5 gpg, 8.1 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Bolzano 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 Bolzano water?
8.5 gpg, equal to 8.1 °dH, 14.5 °fH or 145 mg/L calcium carbonate.
What dishwasher salt setting should I use in Bolzano?
For 145 mg/L (8.1 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Bolzano?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: SEAB Bozner Wasser, Wasserhärte page (range text) with per-point analysis PDFs (2025-12). Method: computed from supplier's calcium and magnesium. SEAB Bozner Wasser, Wasserhärte page (range text) with per-point analysis PDFs · Outdated figure? Tell us