Blausteinsee is located primarily the municipality of Eschweiler, the only exception being the Schlangengraben stream flowing to its north, which is part of the municipality of Aldenhoven.
Blausteinsee is located primarily the municipality of Eschweiler being the Schlangengraben stream. This Schlangengraben stream is flowing to its north. Eschweiler is the only exception. Its north is part of the municipality of Aldenhoven.