Water hardness in Tatabánya
25.2 °dH very hard
Tap water in Tatabánya is very hard: 25.2 °dH (450 mg/L · 26.3 gpg · 45 °fH).
Source: NNGYK — Magyarországi települések ivóvízminősége (HUMVI 2024) (2024) · data checked 2026-10-21
Tatabánya is supplied by the Északdunántúli Vízmű (ÉDV), which relies on karst water from the Tata–Tatabánya basin; its regional network is being expanded. Limestone and dolomite of the Transdanubian Mountains release calcium and magnesium into the water, which is why supplies tied to this karst are among the hardest in Hungary; for Tatabánya the 2024 national report gives 449.8 mg/L CaCO₃ (very hard). At this level scale builds quickly in heaters and washing machines, so descaling more often is needed.
Hungarian suppliers report total hardness in German degrees (nk°) or mg/L CaO; the limit is 50–350 mg/L CaO.
Water data
| Total hardness | 25.2 °dH |
|---|
How Tatabánya compares
- Tap water in Tatabánya is 57 % harder than the median of the 3053 cities we track in Hungary (16.1 °dH).
- By hardness it ranks 151 of 3053 in Hungary (1 = hardest); 95 % of these cities have softer water.
- In Komárom-Esztergom it is number 9 of 75 cities; the regional median is 23.8 °dH.
- Nearest city with clearly softer water: Vértesszőlős, 3 km away (16.9 °dH).
- Nearest city with clearly harder water: Szigetújfalu, 57 km away (33.9 °dH).
Ranking of the hardest and softest water in Hungary →
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 Tatabánya
| Brand | Setting for this water |
|---|---|
| Bosch | H06 |
| Miele | 25 °dH |
| AEG / Electrolux | 6 |
| Beko | 6th |
| Hoover | S3 |
| LG | H4 |
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 Tatabánya water hard or soft?
It is very hard: 450 mg/L as CaCO₃ (26.3 gpg, 25.2 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Tatabánya safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Hungarian suppliers report total hardness in German degrees (nk°) or mg/L CaO; the limit is 50–350 mg/L CaO.
How many grains per gallon is Tatabánya water?
26.3 gpg, equal to 25.2 °dH, 45 °fH or 450 mg/L calcium carbonate.
What dishwasher salt setting should I use in Tatabánya?
For 450 mg/L (25.2 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Tatabánya?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: NNGYK — Magyarországi települések ivóvízminősége (HUMVI 2024) (2024). Method: figure published by the water supplier. NNGYK — Magyarországi települések ivóvízminősége (HUMVI 2024) · Outdated figure? Tell us