Water hardness in Wrocław
207 mg/L very hard
Tap water in Wrocław is very hard: 207 mg/L (12.1 gpg · 11.6 °dH · 20.7 °fH).
Source: MPWiK Wrocław S.A. - parametry wody (Twardość ogólna, III kwartał 2026) (2026) · data checked 2026-10-21
Range across supply zones: 149–209 mg/L.
3 supply zones — hardness varies by neighbourhood; the figure above is the median.
Hardness by district / supply zone
| mg/L | mg/L | ||
|---|---|---|---|
| Leśnica pompownia II stopnia | 209 | 209 | very hard |
| ZPW Mokry Dwór | 149 | 149 | hard |
| ZPW Na Grobli | 207 | 207 | very hard |
MPWiK Wrocław lists total hardness for three sampling points for the third quarter of 2026: Mokry Dwór at 149 mg/L CaCO₃, Na Grobli at 207 and the Leśnica pumping station at 209. The city figure of 207 mg/L is the median of those three. Coverage is thin, since three points cannot show every district. The utility reports in mg CaCO₃/l against the national limit of 60 to 500.
Polish suppliers report total hardness in mg/L CaCO₃; the drinking-water regulation range is 60–500 mg/L.
Water data
| Total hardness | 207 mg/L |
|---|---|
| Utility | MPWiK Wrocław S.A. (Miejskie Przedsiębiorstwo Wodociągów i Kanalizacji we Wrocławiu) |
How Wrocław compares
- Tap water in Wrocław is 16 % softer than the median of the 91 cities we track in Poland (245 mg/L).
- By hardness it ranks 66 of 91 in Poland (1 = hardest); 28 % of these cities have softer water.
- In dolnośląskie it is number 7 of 7 cities; the regional median is 245 mg/L.
- Nearest city with clearly softer water: Opole, 79 km away (143 mg/L).
- Nearest city with clearly harder water: Oleśnica, 28 km away (445 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 Wrocław
| Brand | Setting for this water |
|---|---|
| Bosch | H03 |
| Miele | 12 °dH |
| AEG / Electrolux | 3 |
| Beko | 3rd |
| Hoover | S2 |
| 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 Wrocław water hard or soft?
It is very hard: 207 mg/L as CaCO₃ (12.1 gpg, 11.6 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Wrocław 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 Wrocław water?
12.1 gpg, equal to 11.6 °dH, 20.7 °fH or 207 mg/L calcium carbonate.
What dishwasher salt setting should I use in Wrocław?
For 207 mg/L (11.6 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Wrocław?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: MPWiK Wrocław S.A. - parametry wody (Twardość ogólna, III kwartał 2026) (2026). Method: figure published by the water supplier. MPWiK Wrocław S.A. - parametry wody (Twardość ogólna, III kwartał 2026) · Outdated figure? Tell us