Water hardness in Halden
3 °dH soft
Tap water in Halden is soft: 3 °dH (54 mg/L · 3.1 gpg · 5.4 °fH).
Source: Halden kommune, Vannkvalitet (municipal web page) (2021) · data checked 2026-11-05
This figure is over 3 years old; hardness may have changed.
Halden kommune states about 3 °dH, or 53.5 mg/L CaCO₃, for its municipal waterworks. The page dates from 2021, so the figure is several years old and may have changed. Scale builds up slowly at this level.
Norwegian waterworks report hardness in °dH or mg/L Ca; most supplies are very soft.
Water data
| Total hardness | 3 °dH |
|---|---|
| Utility | Halden kommune (VA / Kommunalteknikk) |
How Halden compares
- Tap water in Halden is 50 % harder than the median of the 89 cities we track in Norway (2 °dH).
- By hardness it ranks 19 of 89 in Norway (1 = hardest); 77 % of these cities have softer water.
- In Østfold it is number 2 of 6 cities; the regional median is 2.7 °dH.
- Nearest city with clearly softer water: Fredrikstad, 28 km away (2.3 °dH).
- Nearest city with clearly harder water: Ringerike, 132 km away (5 °dH).
Ranking of the hardest and softest water in Norway →
What it means at home
- Little or no limescale in kettles, water heaters or washing machines.
- Soap lathers easily; water does not dry skin or hair.
- Dishwasher: salt setting at minimum or off.
- No softener needed; a jug filter only changes taste.
How much salt will you use for softening?
No. Water this soft does not need softening.
Descale a coffee machine or kettle about every 6 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Halden
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 3 °dH |
| AEG / Electrolux | 1 |
| Beko | 1st |
| Hoover | S0 |
| LG | H0 |
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 Halden water hard or soft?
It is soft: 54 mg/L as CaCO₃ (3.1 gpg, 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 Halden safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Norwegian waterworks report hardness in °dH or mg/L Ca; most supplies are very soft.
How many grains per gallon is Halden water?
3.1 gpg, equal to 3 °dH, 5.4 °fH or 54 mg/L calcium carbonate.
What dishwasher salt setting should I use in Halden?
For 54 mg/L (3 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Halden?
No. With soft water a softener adds nothing.
Source
Source: Halden kommune, Vannkvalitet (municipal web page) (2021). Method: figure published by the water supplier. Halden kommune, Vannkvalitet (municipal web page) · Outdated figure? Tell us