Western NSW Local Health District chief executive Scott McLachlan revealed on Wednesday that more than 90 per cent of their staff have now been vaccinated.

"Importantly in all of our age care environments and multi-purpose services, all of our staff are vaccinated that are caring for residents and we're just following up on a couple of people at the moment," he said.

"There's been a focus on making sure, particularly where we're caring for frail or elderly that staff are vaccinated and that's non-negotiable for us.

"We've got another couple of weeks to make sure our staff right across the whole of the region have got at least one dose in their arm and up to the end of November with two doses. With only about ten per cent of our staff to go, I'm confident we'll hit that."

The Public Health (COVID-19 Vaccination of Health Care Workers) Order 2021 requires health care workers to have their first dose COVID vaccination by September 30 and second dose by November 30, unless they have a medical contraindication form signed by a medical practitioner.

As the end of lockdown looms for the entire state, the health boss gave an update on when he believes the region would hit 70 per cent double-dose.

"At the current rate I'd expect it in the next four to five weeks," he said.

"We've had some success with the Australia Defence Force having extended their time in the region right through to the end of October. That's a perfect time for us. There's still a long way to go to get 70 and 80 per cent of people in our region double-dosed."

On Wednesday it was also revealed that the source of infection of more than 100 people who have tested positive for COVID in Western NSW is still unknown.

It came as Mr McLachlan answered questions relating to test and trace in the region.

"It's something we see right across the state that in the first 24 hours it's hard to identify where exactly the person picked up COVID from," he said.

"A lot of that contact tracing will continue for days to make sure we can track that down wherever possible. There's still 10-15 per cent of cases throughout the whole of this outbreak through nearly 1000 people now that we haven't been able to pick it up from and sometimes it's just not possible."

Across the Western NSW Local Health District there have been 6 new cases of COVID reported to 8pm Tuesday night. Three were in Bathurst, two in Dubbo and one in Warrumbungle.

Three are linked to known exposures and 3 cases are under investigation.

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