Lake Tarawera is in the southwest section of the Haroharo Caldera. It covers 41 sq km and is more than 87 m at its deepest. The catchment is largely covered in indigenous forest and scrub, with about 20 percent pasture cover and 16 percent exotic forest. Seven other lakes feed into Tarawera. Lake Tarawera has low productivity and is classed as oligotrophic, with good water quality (source www.lawa.co.nz).