|Location||Plön district, Schleswig-Holstein, Germany|
|Reference no.||DE: 965529|
|Length||8.5 km |
|Progression||Hagener Au-> Baltic Sea|
Together with the Mühlenau it is one of the two tailstreams of the lake known as the Selenter See. At its outlet into the Salzau near Fargau the water level of the lake can be controlled. On its way to the Baltic Sea it flows into the Passader See. It leaves this as the Hagener Au, which after the last few metres discharges into the Baltic between Laboe and Stein.
The Salzau gives its name to the village of Salzau in the municipality of Fargau-Pratjau, whose manor house, was called Salzau Castle (Schloss Salzau) locally and now houses the Salzau state cultural centre.