Water hardness in Uusikaupunki
7.3 °dH hard
Tap water in Uusikaupunki is hard: 7.3 °dH (130 mg/L · 7.6 gpg · 13 °fH).
Source: Nervanderin vesilaitokselta lahtevan talousveden viranomaisvalvonnan tuloskooste 2024 (Uudenkaupungin Vesi) (2024) · data checked 2026-11-07
Range across supply zones: 110–140 mg/L.
Finnish waterworks report hardness in °dH; most supplies are soft.
Water data
| Total hardness | 7.3 °dH |
|---|---|
| Utility | Uudenkaupungin Vesi (Nervanderin vesilaitos) |
How Uusikaupunki compares
- Tap water in Uusikaupunki is 110 % harder than the median of the 76 cities we track in Finland (3.5 °dH).
- By hardness it ranks 3 of 76 in Finland (1 = hardest); 96 % of these cities have softer water.
- Nearest city with clearly softer water: Naantali, 50 km away (2.9 °dH).
Ranking of the hardest and softest water in Finland →
What it means at home
- Fast scale on taps, shower screens and kettle; white spots on glassware.
- Water heater: efficiency loss and element failures within years if unprotected.
- Dry skin and dull hair after showering are common.
- Softener recommended; jug or reverse osmosis for drinking.
How much salt will you use for softening?
Recommended, especially with a heater or boiler: scale cuts efficiency and shortens its life.
Descale a coffee machine or kettle about every 2 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Uusikaupunki
| Brand | Setting for this water |
|---|---|
| Bosch | H01 |
| Miele | 7 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| Hoover | S1 |
| LG | H2 |
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 Uusikaupunki water hard or soft?
It is hard: 130 mg/L as CaCO₃ (7.6 gpg, 7.3 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Uusikaupunki 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 Uusikaupunki water?
7.6 gpg, equal to 7.3 °dH, 13 °fH or 130 mg/L calcium carbonate.
What dishwasher salt setting should I use in Uusikaupunki?
For 130 mg/L (7.3 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in Uusikaupunki?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: Nervanderin vesilaitokselta lahtevan talousveden viranomaisvalvonnan tuloskooste 2024 (Uudenkaupungin Vesi) (2024). Method: figure published by the water supplier. Nervanderin vesilaitokselta lahtevan talousveden viranomaisvalvonnan tuloskooste 2024 (Uudenkaupungin Vesi) · Outdated figure? Tell us