Water hardness in Joensuu
3.1 °dH soft
Tap water in Joensuu is soft: 3.1 °dH (55 mg/L · 3.2 gpg · 5.5 °fH).
Source: Joensuun Vesi, annual report 2024 (PDF), Kokonaiskovuus per intake (2024) · data checked 2026-10-21
Range across supply zones: 40–80 mg/L.
Joensuun Vesi's 2024 annual report lists total hardness for each intake, and eight of the nine columns have a value. They run from 0.4 to 0.8 mmol/L, and the page uses their median. The intake names could not be matched to districts in the text we extracted. Water at this level is soft, so scale in kettles and showers builds slowly.
Finnish waterworks report hardness in °dH; most supplies are soft.
Water data
| Total hardness | 3.1 °dH |
|---|---|
| Utility | Joensuun Vesi (City of Joensuu waterworks) |
How Joensuu compares
- Tap water in Joensuu is 11 % softer than the median of the 76 cities we track in Finland (3.5 °dH).
- By hardness it ranks 45 of 76 in Finland (1 = hardest); 40 % of these cities have softer water.
- Nearest city with clearly softer water: Liperi, 22 km away (2.1 °dH).
- Nearest city with clearly harder water: Kuopio, 111 km away (3.9 °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 Joensuu
| 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 Joensuu water hard or soft?
It is soft: 55 mg/L as CaCO₃ (3.2 gpg, 3.1 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Joensuu 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 Joensuu water?
3.2 gpg, equal to 3.1 °dH, 5.5 °fH or 55 mg/L calcium carbonate.
What dishwasher salt setting should I use in Joensuu?
For 55 mg/L (3.1 °dH) check your manufacturer's table: level 0–1, usually no salt.
Do I need a water softener in Joensuu?
No. With soft water a softener adds nothing.
Source
Source: Joensuun Vesi, annual report 2024 (PDF), Kokonaiskovuus per intake (2024). Method: computed from supplier's calcium and magnesium. Joensuun Vesi, annual report 2024 (PDF), Kokonaiskovuus per intake · Outdated figure? Tell us