Water hardness in Nyírderzs
16.3 °dH very hard
Tap water in Nyírderzs is very hard: 16.3 °dH (291 mg/L · 17 gpg · 29.1 °fH).
Source: NNGYK — Magyarországi települések ivóvízminősége (HUMVI 2024) (2024) · data checked 2026-10-21
NNGYK's 2024 report lists Nyírderzs, in Szabolcs-Szatmár-Bereg county, at 290.9 mg/L as CaCO₃, which is very hard. The report does not say which supply feeds the village, so the figure should be read as the published value for the town. Heating elements and taps will scale up faster at this level.
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 | 16.3 °dH |
|---|
How Nyírderzs compares
- Tap water in Nyírderzs is close to the median of the 3053 cities we track in Hungary (16.1 °dH).
- By hardness it ranks 1466 of 3053 in Hungary (1 = hardest); 52 % of these cities have softer water.
- In Szabolcs-Szatmár-Bereg it is number 56 of 239 cities; the regional median is 14.7 °dH.
- Nearest city with clearly softer water: Sárgaháza, 11 km away (12.1 °dH).
- Nearest city with clearly harder water: Terem, 16 km away (20.4 °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 Nyírderzs
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 16 °dH |
| AEG / Electrolux | 4 |
| Beko | 5th |
| 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 Nyírderzs water hard or soft?
It is very hard: 291 mg/L as CaCO₃ (17 gpg, 16.3 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Nyírderzs 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 Nyírderzs water?
17 gpg, equal to 16.3 °dH, 29.1 °fH or 291 mg/L calcium carbonate.
What dishwasher salt setting should I use in Nyírderzs?
For 291 mg/L (16.3 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Nyírderzs?
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