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The River Murray is Australia's longest river at 2,508 km, spanning South Australia, New South Wales and Victoria. It is the third-longest navigable river in the world behind the Amazon and the Nile. 

The River Murray is part of the Murray–Darling Basin and is a vital national resource providing essential water for irrigation, industry, domestic and recreational use. It supports important ecosystems including those of national and international significance.

The SOER is required to report on the health of the River Murray.

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