Tap water hardness in Brandenburg
We have published hardness data for 15 cities in Brandenburg. The median is 16 °dH; the hardest water is in Lübbenau/Spreewald (25 °dH), the softest in Forst (8.5 °dH).
100 % of these cities have hard or very hard water (over 120 mg/L).
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Cities in Brandenburg, hardest first
| °dH | mg/L | ||
|---|---|---|---|
| Lübbenau/Spreewald | 25 | 446 | very hard |
| Stahnsdorf | 23.3 | 416 | very hard |
| Prenzlau | 20.8 | 371 | very hard |
| Potsdam | 19 | 339 | very hard |
| Frankfurt (Oder) | 18.6 | 332 | very hard |
| Königs Wusterhausen | 18.2 | 325 | very hard |
| Schulzendorf | 18.1 | 323 | very hard |
| Oranienburg | 16 | 286 | very hard |
| Fürstenberg/Havel | 14 | 250 | very hard |
| Templin | 13 | 232 | very hard |
| Eisenhüttenstadt | 12.5 | 223 | very hard |
| Storkow (Mark) | 11.8 | 210 | very hard |
| Rathenow | 11.7 | 210 | very hard |
| Finsterwalde | 11.4 | 204 | very hard |
| Forst | 8.5 | 152 | hard |