Water hardness in Kokkola
6.2 °dH moderately hard
Tap water in Kokkola is moderately hard: 6.2 °dH (110 mg/L · 6.4 gpg · 11 °fH).
Source: Kokkolan Vesi - Tietoa vedestä (Veden kovuus) (2026) · data checked 2026-10-23
Finnish waterworks use lake water, often treated or recharged through glacial esker deposits, or natural groundwater. Hardness here is above what the mostly granite bedrock would suggest, so local deposits or the supplier's source are likely to play a role. The reported hardness is 110.1 mg/L CaCO₃. Limescale appears gradually on taps and heating elements; occasional descaling keeps it in check.
Finnish waterworks report hardness in °dH; most supplies are soft.
Water data
| Total hardness | 6.2 °dH |
|---|---|
| Utility | Kokkolan Vesi (City of Kokkola) |
How Kokkola compares
- Tap water in Kokkola is 78 % harder than the median of the 76 cities we track in Finland (3.5 °dH).
- By hardness it ranks 7 of 76 in Finland (1 = hardest); 91 % of these cities have softer water.
- Nearest city with clearly softer water: Pedersöre, 30 km away (4.5 °dH).
- Nearest city with clearly harder water: Korsholm, 108 km away (9 °dH).
Ranking of the hardest and softest water in Finland →
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 Kokkola
| 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 Kokkola water hard or soft?
It is moderately hard: 110 mg/L as CaCO₃ (6.4 gpg, 6.2 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Kokkola 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 Kokkola water?
6.4 gpg, equal to 6.2 °dH, 11 °fH or 110 mg/L calcium carbonate.
What dishwasher salt setting should I use in Kokkola?
For 110 mg/L (6.2 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Kokkola?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: Kokkolan Vesi - Tietoa vedestä (Veden kovuus) (2026). Method: figure published by the water supplier. Kokkolan Vesi - Tietoa vedestä (Veden kovuus) · Outdated figure? Tell us