Water hardness in Nacka
4.8 °dH moderately hard
Tap water in Nacka is moderately hard: 4.8 °dH (86 mg/L · 5 gpg · 8.6 °fH).
Source: Nacka Vatten och Avfall, Sammanställning dricksvattenanalyser 2025 (2025) · data checked 2026-10-29
Nacka Vatten och Avfall's 2025 summary of drinking water analyses gives 86.4 mg/L as CaCO3, which is moderate hardness. At this level, scale is a minor nuisance, and detergent dosing can usually follow the manufacturer's middle setting.
Swedish municipalities report °dH; most surface-water supplies are soft.
Water data
| Total hardness | 4.8 °dH |
|---|---|
| Utility | Nacka Vatten och Avfall |
How Nacka compares
- Tap water in Nacka is close to the median of the 33 cities we track in Sweden (4.7 °dH).
- By hardness it ranks 16 of 33 in Sweden (1 = hardest); 53 % of these cities have softer water.
- In Stockholm it is number 7 of 8 cities; the regional median is 5.6 °dH.
- Nearest city with clearly softer water: Köping, 125 km away (2 °dH).
- Nearest city with clearly harder water: Danderyd, 13 km away (6.3 °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 Nacka
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 5 °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 Nacka water hard or soft?
It is moderately hard: 86 mg/L as CaCO₃ (5 gpg, 4.8 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Nacka 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 Nacka water?
5 gpg, equal to 4.8 °dH, 8.6 °fH or 86 mg/L calcium carbonate.
What dishwasher salt setting should I use in Nacka?
For 86 mg/L (4.8 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Nacka?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: Nacka Vatten och Avfall, Sammanställning dricksvattenanalyser 2025 (2025). Method: figure published by the water supplier. Nacka Vatten och Avfall, Sammanställning dricksvattenanalyser 2025 · Outdated figure? Tell us