Aabach (Greifensee)

Aabach
Location
Country	Switzerland
Physical characteristics
Source	Pfäffikersee
Mouth	Greifensee
• coordinates	47°21′06″N 8°41′20″E / 47.3516°N 8.6888°E / 47.3516; 8.6888
Basin features
Progression	Greifensee→ Glatt→ Rhine→ North Sea

The Aabach (also Aa, or Ustermer Aa for disambiguation with the Mönchaltorfer Aa) is a minor river in the canton of Zürich, Switzerland. At a length of 11.2 kilometres (7.0 mi), it flows from Pfäffikersee to the Greifensee. Its valley is known as Aatal ("Aa Valley"), eponymous of the settlement Aathal.

• 
  Aabach on Lake Pfäffikon
• 
  Aabach reservoir in Wetzikon
• 
  Aabach nearby Aathal-Seegräben (Aa Valley)
• 
  Usterner Aa in Uster
• 
  Usterner Aa on Lake Greifen

• List of rivers of Switzerland

• Media related to Ustermer Aa at Wikimedia Commons