Barnett refuses to guess WA ratings future

Premier Colin Barnett says he won't speculate on whether Western Australia's credit rating will be downgraded again in the wake of the state's deficit and debt.

Standard & Poor's put the state on notice in April, warning of a potential credit downgrade to its key long term AA+ rating due to its weakening budget position.

"I'm not going to go into the land of guessing," Mr Barnett said in budget estimates on Tuesday.