Aavoja

The Aavoja is a 22.1 km (13.7 mi) long river in Anija Parish, Harju County, Estonia that flows into the Jägala River near Kehra.

Aavoja Kehra oja, Pillapalu peakraav
Location
Country	Estonia
County	Harju
Parish	Anija
Physical characteristics
Source	near Koitjärve Bog in Pillapalu
• coordinates	59°21′22″N 25°38′7″E
• elevation	67.5 m (221 ft)
Mouth	Jägala River near Kehra
• coordinates	59°20′15″N 25°20′48″E
• elevation	44.5 m (146 ft)
Length	22.1 km (13.7 mi)
Basin size	69.1 km2 (26.7 sq mi)
Discharge
• location	before Aavoja Reservoir
• average	1 m3/s (35 cu ft/s)
Basin features
Progression	Jägala River → Gulf of Finland
Tributaries
• left	Verioja
• right	Aruoja, Raudoja-Aavoja Canal

The current source is located in the village of Pillapalu, just south of Koitjärve Bog. The upstream part of the river was dug in the 1930s to drain Aguparra Bog.^[1]

Väike-Aavoja and Aavoja reservoirs are located on the river. The river is part of the Tallinn water supply system. The basin area of the river is 69.1 km² (26.7 sq mi).^[2]