The Murrumbidgee Catchment occupies an area of approximately 84,000 square kilometres.
Situated in the lower-Murrumbidgee Catchment are the Murrumbidgee Irrigation Area and the Coleambally Irrigation Area. More than 10 000 kilometres of irrigation channels supplied by Burrinjuck Dam near Yass and Blowering Dam near Tumut provide these irrigation areas with water.
The Murrumbidgee catchment is home to sites of international ecological significance including the Fivebough and Tuckerbil Swamps and the Lowbidgee Wetlands.
An experimental manual fishway at Balranald Weir has been constructed and in the first four weeks almost 8,000 fish were observed using the fishway. NSW DPI and Balranald Shire Council have now successfully sought funds from the Environmental Trust to automate the fishway to provide permanent benefits to the ecology of the Lower Murrumbidgee River.