The State Government’s move to bolster paramedic numbers in Western Australia is nothing but "smoke and mirrors", according to the state’s ambulance union.

United Voice said the announcement contained little more than what was revealed in last year’s budget and would not fix the cracks in the state’s embattled ambulance service.

"The report is nothing more than smoke and mirrors," United Voice secretary Dave Kelly said.

"The fact of the matter is the clear lack of resources is still not being addressed."

The comments come after Health Minister Kim Hames revealed $149.5 million would be spent upgrading St John Ambulance over the next four years, including an extra 309 paramedics and officers, in response to an independent review of ambulance operations.

Dr Hames unveiled a report addressing 13 recommendations, featuring new IT systems to more staff, more ambulances and new safety and quality monitoring, in a bid to improve the non-government organisation that runs ambulance services across WA and the Northern Territory.

He said four new depots have already opened, 22 new ambulances and patient transport vehicles have hit the road, 79 new paramedics have been recruited and 24 new communications officers have started work.

But Mr Kelly said the government was not providing the community with 24-hour access to emergency services and more needed to be done.

"The Dawesville depot will only have a station manager and some volunteers – no professional paramedics will be available," he said.

"And in Ellenbrook, the depot is only open set hours for four days a week."