Tap water hardness in dolnośląskie
We have published hardness data for 7 cities in dolnośląskie. The median is 245 mg/L; the hardest water is in Dzierżoniów (483 mg/L), the softest in Wrocław (207 mg/L).
100 % of these cities have hard or very hard water (over 120 mg/L).
Polish suppliers report total hardness in mg/L CaCO₃; the drinking-water regulation range is 60–500 mg/L.
Cities in dolnośląskie, hardest first
| mg/L | mg/L | ||
|---|---|---|---|
| Dzierżoniów | 483 | 483 | very hard |
| Oleśnica | 445 | 445 | very hard |
| Świdnica | 264 | 264 | very hard |
| Głogów | 245 | 245 | very hard |
| Wałbrzych | 241 | 241 | very hard |
| Legnica | 222 | 222 | very hard |
| Wrocław | 207 | 207 | very hard |