Radio talk back host Alan Jones is in hot water again with the media watchdog after breaching the commercial radio code of practice by making unsubstantiated comments about power station closures and the salaries of climate change bureaucrats.

The Australian Communications and Media Authority rejected a third complaint that the Sydney broadcaster got his facts wrong about NBN rollout costs.

2GB broadcaster Alan Jones is back in hot water after breaching the commercial radio code of practice. Credit:Jim Rice

But the regulator was critical of Jones' use of exaggerated and emotive terms, such as "white elephant" and "disaster". "His delivery was emotional, the language judgemental and hyperbolic, and the statements lacking in specificity," ACMA said. All in all, Jones was deemed to be expressing his opinion, not fact.

Radio 2GB has also been found to be in breach over its failure to properly respond to two complaints, one of which the station licensee Harbour Radio Pty Ltd had deemed frivolous.