Tap water hardness in mazowieckie
We have published hardness data for 17 cities in mazowieckie. The median is 251 mg/L; the hardest water is in Ciechanów (338 mg/L), the softest in Nowy Dwór Mazowiecki (195 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 mazowieckie, hardest first
| mg/L | mg/L | ||
|---|---|---|---|
| Ciechanów | 338 | 338 | very hard |
| Mińsk Mazowiecki | 274 | 274 | very hard |
| Bemowo | 260 | 260 | very hard |
| Warsaw, Białołęka | 260 | 260 | very hard |
| Warsaw, Bielany | 260 | 260 | very hard |
| Płock | 256 | 256 | very hard |
| Warsaw | 251 | 251 | very hard |
| Praga Północ | 251 | 251 | very hard |
| Warsaw, Targówek | 251 | 251 | very hard |
| Warsaw, Mokotów | 241 | 241 | very hard |
| Warsaw, Praga-Południe | 241 | 241 | very hard |
| Legionowo | 240 | 240 | very hard |
| Ostrołęka | 240 | 240 | very hard |
| Sochaczew | 236 | 236 | very hard |
| Otwock | 212 | 212 | very hard |
| Wawer | 196 | 196 | very hard |
| Nowy Dwór Mazowiecki | 195 | 195 | very hard |