The transmission system consists of 138 km of gravity sewers, ranging from 525 to 1500 mm diameter, 58 km of pressure pipelines (forcemains) of 500 to 900 mm diameter, and 5 pump stations. See following map for system layout.

This system conveys wastewater to the Alberta Capital Region Wastewater Treatment Plant from member municipalities in the west, north and east sections of the region. It also conveys wastewater from the south members (City and County of Leduc, and the Town of Beaumont) into the City of Edmonton system for treatment. In exchange, the Capital Region Wastewater Treatment Plant takes wastewater from Clareview in northeast Edmonton and from the Clover Bar Industrial Area.