Water hardness in Dzierżoniów
483 mg/L very hard
Tap water in Dzierżoniów is very hard: 483 mg/L (28.2 gpg · 27.1 °dH · 48.3 °fH).
Source: WiK Dzierżoniów – Twardość wody (aktualizacja 02.01.2026) (2026) · data checked 2026-10-29
WiK Dzierżoniów reported 483 mg/L CaCO₃ in its January 2026 update, one of the highest values among Polish towns here. That is very hard and close to the upper limit we publish without extra review. Heavy limescale is likely, so a softener or descaling routine deserves serious thought.
Polish suppliers report total hardness in mg/L CaCO₃; the drinking-water regulation range is 60–500 mg/L.
Water data
| Total hardness | 483 mg/L |
|---|---|
| Utility | Wodociągi i Kanalizacja Dzierżoniów (WiK) |
How Dzierżoniów compares
- Tap water in Dzierżoniów is 97 % harder than the median of the 91 cities we track in Poland (245 mg/L).
- By hardness it ranks 1 of 91 in Poland (1 = hardest); 100 % of these cities have softer water.
- In dolnośląskie it is number 1 of 7 cities; the regional median is 245 mg/L.
- Nearest city with clearly softer water: Świdnica, 17 km away (264 mg/L).
Ranking of the hardest and softest water in Poland →
What it means at home
- Severe scale: heater elements and washing-machine heaters fail early.
- Detergent use is very high; taps and screens coat within days.
- Dishwasher at maximum salt setting.
- An ion-exchange softener is practically essential; RO for drinking water.
How much salt will you use for softening?
Yes. At this hardness a softener pays for itself through appliance life and detergent.
Descale a coffee machine or kettle about every 1 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Dzierżoniów
| Brand | Setting for this water |
|---|---|
| Bosch | H06 |
| Miele | 27 °dH |
| AEG / Electrolux | 6 |
| Beko | 6th |
| Hoover | S4 |
| LG | H4 |
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 Dzierżoniów water hard or soft?
It is very hard: 483 mg/L as CaCO₃ (28.2 gpg, 27.1 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Dzierżoniów safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. Polish suppliers report total hardness in mg/L CaCO₃; the drinking-water regulation range is 60–500 mg/L.
How many grains per gallon is Dzierżoniów water?
28.2 gpg, equal to 27.1 °dH, 48.3 °fH or 483 mg/L calcium carbonate.
What dishwasher salt setting should I use in Dzierżoniów?
For 483 mg/L (27.1 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Dzierżoniów?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: WiK Dzierżoniów – Twardość wody (aktualizacja 02.01.2026) (2026). Method: figure published by the water supplier. WiK Dzierżoniów – Twardość wody (aktualizacja 02.01.2026) · Outdated figure? Tell us