A South Australian minister has been reminded to behave appropriately by the Premier, and had his actions condemned by the Deputy Prime Minister after an expletive-laden outburst in relation to the Murray-Darling Basin Plan.

SA Water Minister Ian Hunter reportedly hurled profanities at his Victorian counterpart Lisa Neville and other state and federal politicians during a dinner at Rigoni's restaurant in Adelaide.

The tirade came as he rebuked the efforts of other states to change the current Murray-Darling plan.

"F*** you all," he said.

Mr Hunter repeatedly told fellow Labor Party minister Ms Neville, "f*** you," and called her a "c***" before storming out of the dinner.

Deputy Prime Minister Barnaby Joyce said if he behaved that way, he would be sacked.

"I'm not going to confirm what happened in the room, I'll leave that to the Victorian Water Minister," Mr Joyce said.

"But the same man then went out into a public restaurant and lost it. Lost his stuff. I mean, you can't do that."

South Australian Premier Jay Weatherill said he reminded Mr Hunter to behave appropriately.

"Minister Hunter, I think like most South Australians, feels passionately about this river and protecting it," Mr Weatherill said.

"Of course I want all of my ministers to behave appropriately, but also want them to stand up for South Australia, and we're simply not going to sit back and be dudded by the upstream states."

The Murray-Darling Basin Plan promised extra water to South Australia, but only if that could be done without hurting communities upstream.

Labor had promised to pursue the Murray-Darling Basin Plan option before the 2013 election.

But Mr Joyce had previously said it was still not clear the extra water could be returned to the environment without serious negative consequences for irrigation communities.