Water hardness in Hamar
2 °dH soft
Tap water in Hamar is soft: 2 °dH (36 mg/L · 2.1 gpg · 3.6 °fH).
Source: Hamar kommune, Drikkevann (offentlig) (2026) · data checked 2026-10-29
Hamar's public water is run by Hias, and Hamar kommune reports about 35.7 mg/L CaCO₃, which is soft. We have not verified the intake for this note. Soft water means little scale, so descaling should be needed only occasionally.
Norwegian waterworks report hardness in °dH or mg/L Ca; most supplies are very soft.
Water data
| Total hardness | 2 °dH |
|---|---|
| Utility | Hias (Hamar vannbehandlingsanlegg) |
How Hamar compares
- Tap water in Hamar is close to the median of the 89 cities we track in Norway (2 °dH).
- By hardness it ranks 45 of 89 in Norway (1 = hardest); 45 % of these cities have softer water.
- In Innlandet it is number 5 of 7 cities; the regional median is 2.8 °dH.
- Nearest city with clearly softer water: Elverum, 28 km away (1 °dH).
- Nearest city with clearly harder water: Brumunddal, 12 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 Hamar
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 2 °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 Hamar water hard or soft?
It is soft: 36 mg/L as CaCO₃ (2.1 gpg, 2 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Hamar 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 Hamar water?
2.1 gpg, equal to 2 °dH, 3.6 °fH or 36 mg/L calcium carbonate.
What dishwasher salt setting should I use in Hamar?
For 36 mg/L (2 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Hamar?
No. With soft water a softener adds nothing.
Source
Source: Hamar kommune, Drikkevann (offentlig) (2026). Method: figure published by the water supplier. Hamar kommune, Drikkevann (offentlig) · Outdated figure? Tell us