The group was formed from the Lower Mataura Catchment Group (2021) to cover the east side of the lower Mataura River. The catchment stretches from the Bridge over the Mataura River at Seawards Downs, right along the Mataura River to Fortrose, and covers the watershed of the Habukinini, Titiroa, Titiwaewae, Waimahaka, Strathellen and Toi toi streams. The catchment includes the areas of Mataura Island, Titiroa, Pine Bush, Waimahaka, Te Peka, Fortification, and Fortrose.
The catchment is very diverse, it includes the townships of Waimahaka and Fortrose, but is mainly made up of farmland covering sheep, beef and deer and dairy and dairy support farms. Large forestry blocks, conservation land, catchment board land are also included in the catchment.
Unique features include, Beggs Bush, O’Neills Bush, large number of whitebait stands, QEII blocks, and Fortrose Estuary.