Water hardness in Turku
2.9 °dH soft
Tap water in Turku is soft: 2.9 °dH (52 mg/L · 3 gpg · 5.2 °fH).
Source: Turun Vesihuolto Oy, Veden laatu (Turun hanaveden laatu v. 2025) (2025) · data checked 2026-10-21
Turun Vesihuolto states the tap-water hardness as 2.9 °dH on its water-quality page, in the section for 2025. That is a single value with no range, and the hardness line itself carries no date, so check the utility page for updates. It is very soft water, and descaling products are seldom needed.
Finnish waterworks report hardness in °dH; most supplies are soft.
Water data
| Total hardness | 2.9 °dH |
|---|---|
| Utility | Turun Vesihuolto Oy |
How Turku compares
- Tap water in Turku is 16 % softer than the median of the 76 cities we track in Finland (3.5 °dH).
- By hardness it ranks 53 of 76 in Finland (1 = hardest); 29 % of these cities have softer water.
- Nearest city with clearly harder water: Salo, 48 km away (4.5 °dH).
Ranking of the hardest and softest water in Finland →
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 Turku
| Brand | Setting for this water |
|---|---|
| Bosch | H00 |
| Miele | 3 °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 Turku water hard or soft?
It is soft: 52 mg/L as CaCO₃ (3 gpg, 2.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Turku safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Finnish waterworks report hardness in °dH; most supplies are soft.
How many grains per gallon is Turku water?
3 gpg, equal to 2.9 °dH, 5.2 °fH or 52 mg/L calcium carbonate.
What dishwasher salt setting should I use in Turku?
For 52 mg/L (2.9 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Turku?
No. With soft water a softener adds nothing.
Source
Source: Turun Vesihuolto Oy, Veden laatu (Turun hanaveden laatu v. 2025) (2025). Method: figure published by the water supplier. Turun Vesihuolto Oy, Veden laatu (Turun hanaveden laatu v. 2025) · Outdated figure? Tell us