Water hardness in Kranj
11 °dH very hard
Tap water in Kranj is very hard: 11 °dH (196 mg/L · 11.5 gpg · 19.6 °fH).
Source: Komunala Kranj d.o.o., Trdota vode (per-settlement ranges, Mestna občina Kranj) (2025) · data checked 2026-10-22
Range across supply zones: 143–250 mg/L.
Komunala Kranj prints hardness ranges per settlement. For Kranj centre, where supply is mixed, the range is 8 to 14 °dH. Nearby villages differ, for example Bobovek at 8 to 9 °dH and Spodnja Besnica at 15 to 18 °dH. The page has no data date, so 2025 is the footer year and not a measurement date. A mixed supply means the reading can shift from one week to the next.
Slovenian suppliers report total hardness in °dH ("nemške stopinje").
Water data
| Total hardness | 11 °dH |
|---|---|
| Utility | Komunala Kranj d.o.o. |
How Kranj compares
- Tap water in Kranj is close to the median of the 15 cities we track in Slovenia (11 °dH).
- By hardness it ranks 8 of 15 in Slovenia (1 = hardest); 50 % of these cities have softer water.
- Nearest city with clearly softer water: Bohinjska Bistrica, 31 km away (6.1 °dH).
- Nearest city with clearly harder water: Grosuplje, 39 km away (20.3 °dH).
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 Kranj
| Brand | Setting for this water |
|---|---|
| Bosch | H03 |
| Miele | 11 °dH |
| AEG / Electrolux | 3 |
| 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 Kranj water hard or soft?
It is very hard: 196 mg/L as CaCO₃ (11.5 gpg, 11 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Kranj safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Slovenian suppliers report total hardness in °dH ("nemške stopinje").
How many grains per gallon is Kranj water?
11.5 gpg, equal to 11 °dH, 19.6 °fH or 196 mg/L calcium carbonate.
What dishwasher salt setting should I use in Kranj?
For 196 mg/L (11 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Kranj?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: Komunala Kranj d.o.o., Trdota vode (per-settlement ranges, Mestna občina Kranj) (2025). Method: computed from supplier's calcium and magnesium. Komunala Kranj d.o.o., Trdota vode (per-settlement ranges, Mestna občina Kranj) · Outdated figure? Tell us