Water hardness in Tydal
4.9 °dH moderately hard
Tap water in Tydal is moderately hard: 4.9 °dH (88 mg/L · 5.1 gpg · 8.8 °fH).
Source: Mattilsynet, Vannverksregisteret – drinking-water analyses (Ås - Aune Vannverk; Hilmo Og Græsli Vannverk; Stugudal Vannverk), NLOD 2.0 (2025) · data checked 2026-10-20
Range across supply zones: 17–88 mg/L.
Tydal has three systems. Ås–Aune Vannverk and Stugudal Vannverk are at 88.1 and 87.5 mg/L CaCO₃, while Hilmo og Græsli Vannverk is at 17.0 mg/L, computed for 2025. The figure here is the median, 87.5 mg/L. Most residents are therefore on the harder water, and some limescale builds up over time.
Norwegian waterworks report hardness in °dH or mg/L Ca; most supplies are very soft.
Water data
| Total hardness | 4.9 °dH |
|---|---|
| Utility | Tydal Kommune |
How Tydal compares
- Tap water in Tydal is 145 % harder than the median of the 89 cities we track in Norway (2 °dH).
- By hardness it ranks 4 of 89 in Norway (1 = hardest); 97 % of these cities have softer water.
- In Trøndelag it is number 1 of 21 cities; the regional median is 1.8 °dH.
- Nearest city with clearly softer water: Malvik, 59 km away (3 °dH).
Ranking of the hardest and softest water in Norway →
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 Tydal
| 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 Tydal water hard or soft?
It is moderately hard: 88 mg/L as CaCO₃ (5.1 gpg, 4.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Tydal 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 Tydal water?
5.1 gpg, equal to 4.9 °dH, 8.8 °fH or 88 mg/L calcium carbonate.
What dishwasher salt setting should I use in Tydal?
For 88 mg/L (4.9 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Tydal?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: Mattilsynet, Vannverksregisteret – drinking-water analyses (Ås - Aune Vannverk; Hilmo Og Græsli Vannverk; Stugudal Vannverk), NLOD 2.0 (2025). Method: computed from supplier's calcium and magnesium. Mattilsynet, Vannverksregisteret – drinking-water analyses (Ås - Aune Vannverk; Hilmo Og Græsli Vannverk; Stugudal Vannverk), NLOD 2.0 · Outdated figure? Tell us