Water hardness in Kuusalu
1.15 mmol/L moderately hard
Tap water in Kuusalu is moderately hard: 1.15 mmol/L (115 mg/L · 6.7 gpg · 6.4 °dH).
Source: Terviseamet, veevärkide veeproovid (avalikud andmed) 2021–2025 (2021-10) · data checked 2026-10-20
Range across supply zones: 88–142 mg/L.
This figure is over 3 years old; hardness may have changed.
Estonian laboratories report total hardness (üldkaredus) in mmol/L or mg-eq/L (1 mmol/L = 2 mg-eq/L = 100 mg/L CaCO₃); groundwater supplies are mostly hard.
Water data
| Total hardness | 1.15 mmol/L |
|---|
How Kuusalu compares
- Tap water in Kuusalu is 51 % softer than the median of the 28 cities we track in Estonia (2.32 mmol/L).
- By hardness it ranks 26 of 28 in Estonia (1 = hardest); 7 % of these cities have softer water.
- In Harjumaa it is number 10 of 11 cities; the regional median is 2.02 mmol/L.
- Nearest city with clearly softer water: Laagri, 48 km away (0.87 mmol/L).
- Nearest city with clearly harder water: Jüri, 32 km away (1.95 mmol/L).
Ranking of the hardest and softest water in Estonia →
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 Kuusalu
| 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 Kuusalu water hard or soft?
It is moderately hard: 115 mg/L as CaCO₃ (6.7 gpg, 6.4 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Kuusalu safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Estonian laboratories report total hardness (üldkaredus) in mmol/L or mg-eq/L (1 mmol/L = 2 mg-eq/L = 100 mg/L CaCO₃); groundwater supplies are mostly hard.
How many grains per gallon is Kuusalu water?
6.7 gpg, equal to 6.4 °dH, 11.5 °fH or 115 mg/L calcium carbonate.
What dishwasher salt setting should I use in Kuusalu?
For 115 mg/L (6.4 °dH) check your manufacturer's table: level 2–3.
Do I need a water softener in Kuusalu?
Not essential; a scale inhibitor protects the heater cheaply.
Source
Source: Terviseamet, veevärkide veeproovid (avalikud andmed) 2021–2025 (2021-10). Method: own measurement. Terviseamet, veevärkide veeproovid (avalikud andmed) 2021–2025 · Outdated figure? Tell us