Brundee Swamp Nature Reserve is approximately six kilometres southeast of Nowra and covers an area of 230 hectares. The area of wetland known as Brundee Swamp extends beyond the boundaries of the reserve, particularly to the north.
Saltwater Swamp Nature Reserve is approximately nine kilometres southeast of Nowra and covers an area of 215 hectares. Saltwater Swamp also extends beyond the boundaries of the reserve. At their closest point, the reserves are 600 metres apart.
Although the ecology of both reserves has been modified by drainage works and other disturbances, they contain wetland vegetation communities that are listed under the Threatened Species Conservation Act and retain high fauna habitat values. Thirty-two bird species have been observed within the reserves, including eleven waterbirds. The endangered green and golden bell frog has also been recorded, and the reserves are likely to play an important role in the conservation of this species because of their natural vegetation cover.