Aabach (Greifensee)

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For other rivers with the same name, see Aa River (disambiguation).

The Ustermer Aa or Aabach is a river in the Canton of Zürich, Switzerland. The river, which has a length of 11.2 kilometres (7.0 mi), flows from the Pfäffikersee to the Greifensee through the deep Aatal (Aa Valley).



Coordinates: 47°21′N 8°41′E / 47.350°N 8.683°E / 47.350; 8.683