Water hardness in Komárom
15 °dH very hard
Tap water in Komárom is very hard: 15 °dH (268 mg/L · 15.6 gpg · 26.8 °fH).
Source: NNGYK — Magyarországi települések ivóvízminősége (HUMVI 2024) (2024) · data checked 2026-10-21
Komárom lies in the karst-rich Gerecse–Vértes area, where karst water and Danube-side wells are the usual sources; the exact supply is not confirmed here. 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 Komárom the 2024 national report gives 267.7 mg/L CaCO₃ (very hard). Limescale appears on kettles and taps within weeks, and heating appliances need regular descaling.
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 | 15 °dH |
|---|
How Komárom compares
- Tap water in Komárom is 7 % softer than the median of the 3053 cities we track in Hungary (16.1 °dH).
- By hardness it ranks 1704 of 3053 in Hungary (1 = hardest); 44 % of these cities have softer water.
- In Komárom-Esztergom it is number 70 of 75 cities; the regional median is 23.8 °dH.
- Nearest city with clearly softer water: Rábapatona, 49 km away (8.2 °dH).
- Nearest city with clearly harder water: Csém, 7 km away (20.5 °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 Komárom
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 15 °dH |
| AEG / Electrolux | 4 |
| Beko | 4th |
| Hoover | S2 |
| 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 Komárom water hard or soft?
It is very hard: 268 mg/L as CaCO₃ (15.6 gpg, 15 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Komárom 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 Komárom water?
15.6 gpg, equal to 15 °dH, 26.8 °fH or 268 mg/L calcium carbonate.
What dishwasher salt setting should I use in Komárom?
For 268 mg/L (15 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Komárom?
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