Compensation payouts to more than 6,500 Queensland flood victims will now be divided from the $440 million available from the Queensland government and Sunwater.

In November 2019 the New South Wales Supreme Court ruled that Seqwater bore 50 per cent of the liability for flood compensation claims, while the Queensland government and Sunwater shared the remaining 50 per cent.

However, on Wednesday Seqwater won its appeal against that decision, ruling out its 50 per cent share of the liability for its management of Wivenhoe and Somerset dams in January 2011.

Premier Annastacia Palaszczuk said that after a decade, that decision would be frustrating for thousands of flood victims.

Maurice Blackburn lawyers are working through thousands of compensation claims for businesses and homeowners, based on the $440 million that is available.