Tap water hardness in pomorskie
We have published hardness data for 7 cities in pomorskie. The median is 220 mg/L; the hardest water is in Chojnice (309 mg/L), the softest in Wejherowo (174 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 pomorskie, hardest first
| mg/L | mg/L | ||
|---|---|---|---|
| Chojnice | 309 | 309 | very hard |
| Rumia | 283 | 283 | very hard |
| Tczew | 230 | 230 | very hard |
| Lębork | 220 | 220 | very hard |
| Słupsk | 208 | 208 | very hard |
| Gdynia | 194 | 194 | very hard |
| Wejherowo | 174 | 174 | hard |