Water hardness in Demjén
13.6 °dH very hard
Tap water in Demjén is very hard: 13.6 °dH (243 mg/L · 14.2 gpg · 24.3 °fH).
Source: NNGYK — Magyarországi települések ivóvízminősége (HUMVI 2024) (2024) · data checked 2026-10-21
The 2024 NNGYK data gives Demjén, in Heves county, a hardness of 242.7 mg/L as CaCO3, classed as very hard. The source does not say which wells or networks feed the village, so we do not describe the geology here. Expect visible limescale on fixtures and appliances.
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 | 13.6 °dH |
|---|
How Demjén compares
- Tap water in Demjén is 16 % softer than the median of the 3053 cities we track in Hungary (16.1 °dH).
- By hardness it ranks 1948 of 3053 in Hungary (1 = hardest); 35 % of these cities have softer water.
- In Heves it is number 63 of 129 cities; the regional median is 13.6 °dH.
- Nearest city with clearly softer water: Vécs, 13 km away (7.6 °dH).
- Nearest city with clearly harder water: Andornaktálya, 6 km away (17.1 °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 Demjén
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 14 °dH |
| AEG / Electrolux | 3 |
| Beko | 4th |
| Hoover | S2 |
| LG | H2 |
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 Demjén water hard or soft?
It is very hard: 243 mg/L as CaCO₃ (14.2 gpg, 13.6 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Demjén 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 Demjén water?
14.2 gpg, equal to 13.6 °dH, 24.3 °fH or 243 mg/L calcium carbonate.
What dishwasher salt setting should I use in Demjén?
For 243 mg/L (13.6 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Demjén?
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