Sixty eight named streams empty into the Reppisch, of which three, namely the
Wüeribach, the
Rummelbach and the
Lunnerenbach, are 4 or more kilometres long. In addition there are 5 tributaries that are 2 kilometres long or more: the
Dönibach, the
Lättenbach, the
Schwandenbach, the
Tobelbach near Birmensdorf and the
Malefizgraben, if one includes its right hand headstream, the
Weidbach. The most important tributary of the Reppisch is the roughly 8-kilometre-long Wüeribach, which drains the plain of
Wettswil and
Bonstetten and empties into the Reppisch near Birmensdorf from the left. ==See also==