Original: This district was established by merging the former districts of Bitterfeld, Köthen and a large part of Anhalt-Zerbst as part of the reform of 2007.
Simplified: This district was established by merging the former districts of Bitterfeld, Köthen and a large part of Anhalt-Zerbst as part of the Saxony-Anhalt border reforms of 2007.