Water hardness in Stará Dobev
1.2 mmol/L hard
Tap water in Stará Dobev is hard: 1.2 mmol/L (120 mg/L · 7 gpg · 6.7 °dH).
Source: ČEVAK a.s. (Veolia), Moje obec – kvalita pitné vody (2026) · data checked 2026-10-21
Stará Dobev in the South Bohemian Region is supplied by ČEVAK, which reports 120.1 mg/L CaCO₃ for the village, in the hard band. Much of South Bohemia sits on the crystalline Bohemian Massif and its sedimentary basins, so values vary from one supply to the next. At this level, expect limescale on kettles and heating elements.
Czech suppliers report "Vápník a hořčík" in mmol/L; the recommended range is 2–3.5 mmol/L.
Water data
| Total hardness | 1.2 mmol/L |
|---|---|
| Calcium (mg/L) | 40 |
| Magnesium (mg/L) | 5 |
| Utility | ČEVAK a.s. |
How Stará Dobev compares
- Tap water in Stará Dobev is close to the median of the 1516 cities we track in Czechia (1.2 mmol/L).
- By hardness it ranks 603 of 1516 in Czechia (1 = hardest); 47 % of these cities have softer water.
- In Jihočeský kraj it is number 78 of 505 cities; the regional median is 1.2 mmol/L.
- Nearest city with clearly softer water: Tažovice, 22 km away (0.65 mmol/L).
- Nearest city with clearly harder water: Sedlíkovice, 6 km away (1.99 mmol/L).
Ranking of the hardest and softest water in Czechia →
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 Stará Dobev
| Brand | Setting for this water |
|---|---|
| Bosch | H01 |
| Miele | 7 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| Hoover | S1 |
| LG | H1 |
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 Stará Dobev water hard or soft?
It is hard: 120 mg/L as CaCO₃ (7 gpg, 6.7 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Stará Dobev safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Czech suppliers report "Vápník a hořčík" in mmol/L; the recommended range is 2–3.5 mmol/L.
How many grains per gallon is Stará Dobev water?
7 gpg, equal to 6.7 °dH, 12 °fH or 120 mg/L calcium carbonate.
What dishwasher salt setting should I use in Stará Dobev?
For 120 mg/L (6.7 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Stará Dobev?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: ČEVAK a.s. (Veolia), Moje obec – kvalita pitné vody (2026). Method: figure published by the water supplier. ČEVAK a.s. (Veolia), Moje obec – kvalita pitné vody · Outdated figure? Tell us