Water hardness in Vallentuna
6.3 °dH moderately hard
Tap water in Vallentuna is moderately hard: 6.3 °dH (113 mg/L · 6.6 gpg · 11.3 °fH).
Source: Norrvatten, Analysdata Görvälnverket vs Ulriksdal (via Danderyd; undated) (2023) · data checked 2026-10-29
Vallentuna is a Norrvatten customer, and the utility's analysis data reports 112.5 mg/L as CaCO3, a moderate level. The source sheet is undated, so the true value at your tap may differ slightly. A softener is rarely needed at this level, but descaling a kettle now and then helps.
Swedish municipalities report °dH; most surface-water supplies are soft.
Water data
| Total hardness | 6.3 °dH |
|---|---|
| Utility | Norrvatten |
How Vallentuna compares
- Tap water in Vallentuna is 34 % harder than the median of the 33 cities we track in Sweden (4.7 °dH).
- By hardness it ranks 7 of 33 in Sweden (1 = hardest); 72 % of these cities have softer water.
- In Stockholm it is number 1 of 8 cities; the regional median is 5.6 °dH.
- Nearest city with clearly softer water: Rinkeby, 18 km away (5 °dH).
Ranking of the hardest and softest water in Sweden →
What it means at home
- Visible kettle scale every few weeks; vinegar or citric acid is enough.
- Water heater and washing machine: some long-term scale; a scale inhibitor slows it.
- Dishwasher: medium salt setting.
- Softener optional; pays off mainly with a gas boiler or tankless heater.
How much salt will you use for softening?
Optional. A scale inhibitor or a small softener protects the heater; soap savings are modest.
Descale a coffee machine or kettle about every 3 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Vallentuna
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 6 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| Hoover | S1 |
| LG | H1 |
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 Vallentuna water hard or soft?
It is moderately hard: 113 mg/L as CaCO₃ (6.6 gpg, 6.3 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Vallentuna safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Swedish municipalities report °dH; most surface-water supplies are soft.
How many grains per gallon is Vallentuna water?
6.6 gpg, equal to 6.3 °dH, 11.3 °fH or 113 mg/L calcium carbonate.
What dishwasher salt setting should I use in Vallentuna?
For 113 mg/L (6.3 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Vallentuna?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: Norrvatten, Analysdata Görvälnverket vs Ulriksdal (via Danderyd; undated) (2023). Method: figure published by the water supplier. Norrvatten, Analysdata Görvälnverket vs Ulriksdal (via Danderyd; undated) · Outdated figure? Tell us