Water hardness in Täby
5.9 °dH moderately hard
Tap water in Täby is moderately hard: 5.9 °dH (105 mg/L · 6.2 gpg · 10.5 °fH).
Source: Norrvatten, Vattenkvalitet 2025 (medelvärden) (2025) · data checked 2026-10-20
Täby has no figure of its own. Norrvatten, the regional wholesaler that supplies the municipality, publishes 2025 averages for its Görvälnverket plant, and the outgoing and user-tap values are the same, 105.3 mg/L CaCO₃. We use that as a regional proxy, not a Täby measurement. The PDF was not machine-readable in our audit, so the value was read through text extraction. Expect scale on kettles and heaters at this level.
Swedish municipalities report °dH; most surface-water supplies are soft.
Water data
| Total hardness | 5.9 °dH |
|---|---|
| Utility | Norrvatten (wholesale supplier; Täby kommun VA is a member) |
How Täby compares
- Tap water in Täby is 26 % harder than the median of the 33 cities we track in Sweden (4.7 °dH).
- By hardness it ranks 12 of 33 in Sweden (1 = hardest); 66 % of these cities have softer water.
- Nearest city with clearly softer water: Haninge, 31 km away (4.7 °dH).
- Nearest city with clearly harder water: Uppsala, 52 km away (7.7 °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 Täby
| 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 Täby water hard or soft?
It is moderately hard: 105 mg/L as CaCO₃ (6.2 gpg, 5.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Täby 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 Täby water?
6.2 gpg, equal to 5.9 °dH, 10.5 °fH or 105 mg/L calcium carbonate.
What dishwasher salt setting should I use in Täby?
For 105 mg/L (5.9 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Täby?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: Norrvatten, Vattenkvalitet 2025 (medelvärden) (2025). Method: figure published by the water supplier. Norrvatten, Vattenkvalitet 2025 (medelvärden) · Outdated figure? Tell us