Tap water hardness in wielkopolskie
We have published hardness data for 5 cities in wielkopolskie. The median is 320 mg/L; the hardest water is in Gniezno (362 mg/L), the softest in Konin (269 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 wielkopolskie, hardest first
| mg/L | mg/L | ||
|---|---|---|---|
| Gniezno | 362 | 362 | very hard |
| Leszno | 337 | 337 | very hard |
| Poznań | 320 | 320 | very hard |
| Kalisz | 280 | 280 | very hard |
| Konin | 269 | 269 | very hard |