The New Zealand Ministry for Culture and Heritage gives a translation of "place of the snare" for Ōreti.[3] In November 2019, the name of the river was officially altered to Ōreti River.[4]
For the final part of the river's length, around the city of Invercargill and the river's estuary just south of the city, it is known as the New River, a name occasionally encountered to refer to the whole river. It shares this estuary with several smaller rivers, most notably the Waihopai River.
The New River Estuary, which meets the end of the Ōreti River before it reaches the sea, is in decline.[5] Recent science reports show that regions of the upper estuary are under stress and showing eutrophication. There is excessive macroalgal growth including sediment quality decline and high concentrations of chlorophyll-a in the water column. Chlorophyll-a was used as an indicator of eutrophic conditions in the water column, and is a colour pigment present in many types of algae that can give an indication of how much algae is present in the water column.[6]