Water hardness in Lunner
0.6 °dH soft
Tap water in Lunner is soft: 0.6 °dH (11 mg/L · 0.7 gpg · 1.1 °fH).
Source: Mattilsynet, Vannverksregisteret – drinking-water analyses (Gran Og Lunner Interkommunale Vannverk; Harestua Vannverk), NLOD 2.0 (2022) · data checked 2026-10-20
Range across supply zones: 5–18 mg/L.
This figure is over 3 years old; hardness may have changed.
Lunner has two systems: Gran og Lunner Interkommunale Vannverk at 5.4 mg/L CaCO₃ and Harestua Vannverk at 17.5 mg/L, both for 2022. The figure here is the median, 11.4 mg/L. This is very soft water, and limescale is hardly a concern.
Norwegian waterworks report hardness in °dH or mg/L Ca; most supplies are very soft.
Water data
| Total hardness | 0.6 °dH |
|---|---|
| Utility | Lunner Kommune |
How Lunner compares
- Tap water in Lunner is 68 % softer than the median of the 89 cities we track in Norway (2 °dH).
- By hardness it ranks 77 of 89 in Norway (1 = hardest); 14 % of these cities have softer water.
- In Akershus it is number 7 of 7 cities; the regional median is 1.4 °dH.
- Nearest city with clearly harder water: Ringerike, 25 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 Lunner
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 1 °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 Lunner water hard or soft?
It is soft: 11 mg/L as CaCO₃ (0.7 gpg, 0.6 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Lunner 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 Lunner water?
0.7 gpg, equal to 0.6 °dH, 1.1 °fH or 11 mg/L calcium carbonate.
What dishwasher salt setting should I use in Lunner?
For 11 mg/L (0.6 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Lunner?
No. With soft water a softener adds nothing.
Source
Source: Mattilsynet, Vannverksregisteret – drinking-water analyses (Gran Og Lunner Interkommunale Vannverk; Harestua Vannverk), NLOD 2.0 (2022). Method: figure published by the water supplier. Mattilsynet, Vannverksregisteret – drinking-water analyses (Gran Og Lunner Interkommunale Vannverk; Harestua Vannverk), NLOD 2.0 · Outdated figure? Tell us