Water hardness in Šentjur
18.2 °dH very hard
Tap water in Šentjur is very hard: 18.2 °dH (325 mg/L · 19 gpg · 32.5 °fH).
Source: JKP Šentjur d.o.o., Trdota pitne vode (skupna trdota po vodovodnih sistemih) (2025-02) · data checked 2026-11-05
Range across supply zones: 262–357 mg/L.
6 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| °dH | mg/L | ||
|---|---|---|---|
| Dolga gora (OO Dolga gora) | 15.7 | 280 | very hard |
| Dramlje (VS Dramlje) | 18.9 | 337 | very hard |
| Loka pri Žusmu (VS Loka pri Žusmu) | 20 | 357 | very hard |
| Planina pri Sevnici (VS Planina pri Sevnici) | 14.7 | 262 | very hard |
| Prevorje (VS Prevorje) | 17.5 | 312 | very hard |
| Šentjur (VS Šentjur) | 18.9 | 337 | very hard |
JKP Šentjur publishes total hardness for six separate supply systems, and the figures differ between them, from 262.4 to 357.0 mg/L. The page uses the median of 324.9 mg/L, so your own tap may sit above or below it depending on which system serves your street. Most readings come from samples taken in November 2023, with Dolga gora sampled in February 2025, so treat them as a snapshot and check the utility page for updates. At this level, expect limescale on kettles and heating elements.
Slovenian suppliers report total hardness in °dH ("nemške stopinje").
Water data
| Total hardness | 18.2 °dH |
|---|---|
| Utility | JKP Šentjur d.o.o. |
How Šentjur compares
- Tap water in Šentjur is 65 % harder than the median of the 15 cities we track in Slovenia (11 °dH).
- By hardness it ranks 2 of 15 in Slovenia (1 = hardest); 86 % of these cities have softer water.
- Nearest city with clearly softer water: Velenje, 27 km away (9 °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 Šentjur
| Brand | Setting for this water |
|---|---|
| Bosch | H05 |
| Miele | 18 °dH |
| AEG / Electrolux | 4 |
| Beko | 5th |
| Hoover | S3 |
| LG | H3 |
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 Šentjur water hard or soft?
It is very hard: 325 mg/L as CaCO₃ (19 gpg, 18.2 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Šentjur 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 Šentjur water?
19 gpg, equal to 18.2 °dH, 32.5 °fH or 325 mg/L calcium carbonate.
What dishwasher salt setting should I use in Šentjur?
For 325 mg/L (18.2 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Šentjur?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: JKP Šentjur d.o.o., Trdota pitne vode (skupna trdota po vodovodnih sistemih) (2025-02). Method: figure published by the water supplier. JKP Šentjur d.o.o., Trdota pitne vode (skupna trdota po vodovodnih sistemih) · Outdated figure? Tell us