Berlin Water Hardness Map

Every Berlin tap runs hard water, but not equally hard. Type your postcode or tap your area to see the official hardness range for your street and the machine settings that follow.

Values are Berliner Wasserbetriebe network medians per postcode. Checked on 11 September 2026.

Softer, around 14 °dH Hardest, up to 25.7 °dH

Berlin citywide

Official range across all postcodes: 10.3 to 25.7 °dH total hardness. Everything above 14 °dH counts as hard.

What this means at home

  • Pick a postcode above to get the settings for your own kitchen.
  • All of Berlin sits in the hard class, so the hard-water rules below apply everywhere; only the intensity changes.

Source: Berliner Wasserbetriebe per-postcode analysis data. The network blends water from nine waterworks, so your tap moves inside the range shown, not on one fixed number.