Addi Hilo is a reservoir located in the Inderta woreda of the Tigray Region in Ethiopia. The earthen dam that holds the reservoir was built in 1998 by SAERT.
In 2002, the life expectancy of the reservoir (the duration before it is filled with sediment) was estimated at 9 years.
The catchment of the reservoir is 0.72 km<sup>2</sup> large, with a perimeter of 3.34 km and a length of 1210 metres. The reservoir suffers from rapid siltation. The lithology of the catchment is dominantly Agula shale and little Mekelle dolerite. Part of the water that could be used for irrigation is lost through seepage; the positive side-effect is that this contributes to groundwater recharge.