Water hardness in Gerjen
37.4 °dH very hard
Tap water in Gerjen is very hard: 37.4 °dH (668 mg/L · 39 gpg · 66.8 °fH).
Source: NNGYK — Magyarországi települések ivóvízminősége (HUMVI 2024) (2024) · data checked 2026-10-29
Gerjen, in Tolna county, is reported at 667.5 mg/L as CaCO3 in the 2024 NNGYK data, the highest value in this batch and unusually high. We have not verified the source or checked the figure against other records, so read it with caution. If it is accurate, scale would form very quickly in boilers and kettles.
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 | 37.4 °dH |
|---|
How Gerjen compares
- Tap water in Gerjen is 132 % harder than the median of the 3053 cities we track in Hungary (16.1 °dH).
- By hardness it ranks 2 of 3053 in Hungary (1 = hardest); 100 % of these cities have softer water.
- In Tolna it is number 1 of 110 cities; the regional median is 17 °dH.
- Nearest city with clearly softer water: Bátya, 4 km away (20.8 °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 Gerjen
| Brand | Setting for this water |
|---|---|
| Bosch | H07 |
| Miele | 37 °dH |
| AEG / Electrolux | 8 |
| Beko | 6th |
| Hoover | S5 |
| 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 Gerjen water hard or soft?
It is very hard: 668 mg/L as CaCO₃ (39 gpg, 37.4 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Gerjen 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 Gerjen water?
39 gpg, equal to 37.4 °dH, 66.8 °fH or 668 mg/L calcium carbonate.
What dishwasher salt setting should I use in Gerjen?
For 668 mg/L (37.4 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Gerjen?
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