Water hardness in Starý Láz
0.98 mmol/L moderately hard
Tap water in Starý Láz is moderately hard: 0.98 mmol/L (98 mg/L · 5.7 gpg · 5.5 °dH).
Source: ČEVAK a.s. (Veolia), Moje obec – kvalita pitné vody (2026) · data checked 2026-10-21
ČEVAK a.s. reports 98.1 mg/L for Starý Láz in the Plzeň Region, which sits at the upper end of the moderate band. The utility's page does not name the water source. Some scale will form in kettles and heaters, but it builds up gradually.
Czech suppliers report "Vápník a hořčík" in mmol/L; the recommended range is 2–3.5 mmol/L.
Water data
| Total hardness | 0.98 mmol/L |
|---|---|
| Calcium (mg/L) | 35 |
| Magnesium (mg/L) | 2.6 |
| Utility | ČEVAK a.s. |
How Starý Láz compares
- Tap water in Starý Láz is 18 % softer than the median of the 1516 cities we track in Czechia (1.2 mmol/L).
- By hardness it ranks 874 of 1516 in Czechia (1 = hardest); 42 % of these cities have softer water.
- In Plzeňský kraj it is number 55 of 75 cities; the regional median is 1.64 mmol/L.
- Nearest city with clearly softer water: Žiznětice, 3 km away (0.32 mmol/L).
- Nearest city with clearly harder water: Neznašovy, 10 km away (1.25 mmol/L).
Ranking of the hardest and softest water in Czechia →
What it means at home
- Visible kettle scale every few weeks; vinegar or citric acid is enough.
- Water heater and washing machine: some long-term scale; a scale inhibitor slows it.
- Dishwasher: medium salt setting.
- Softener optional; pays off mainly with a gas boiler or tankless heater.
How much salt will you use for softening?
Optional. A scale inhibitor or a small softener protects the heater; soap savings are modest.
Descale a coffee machine or kettle about every 3 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Starý Láz
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 5 °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 Starý Láz water hard or soft?
It is moderately hard: 98 mg/L as CaCO₃ (5.7 gpg, 5.5 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Starý Láz 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 Starý Láz water?
5.7 gpg, equal to 5.5 °dH, 9.8 °fH or 98 mg/L calcium carbonate.
What dishwasher salt setting should I use in Starý Láz?
For 98 mg/L (5.5 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Starý Láz?
Not essential; a scale inhibitor protects the heater cheaply.
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