Residents in Orange, Cabonne and Blayney woke Wednesday morning to stay at home orders and five venues of concern.

The chief executive of Western NSW Local Health District, Scott McLachlan, said the QR codes and check in process has become their "best friend" in contact tracing.

"Contact tracing has been underway for the last 24 hours with the list of people who were at those five venues throughout Orange," Mr McLachlan said.

"All of those people have now been contacted via text message and requested to both isolate and come in for a COVID test immediately.

"From the QR code check-in process that the confirmed case has identified for us that's identified the five locations for us in Orange, we're confident from all of the check-ins that he did with the QR codes that that's the extent of the locations."

He did add that through further contact tracing and testing, they will continue determine whether there are any other places that might need to be identified.

Dozens of additional staff and new testing clinics have also been brought in across the region in an effort to speed up the testing process.

"I think we were very quick to put the stay at home orders in place," Mr McLachlan added.

"From the time that we knew we had a confirmed COVID case in the region to when we knew where that person had been and the potential exposure it was literally hours before the decision making was underway to progress the stay at home orders. I think we have been quick.

"I don't want us to see any further spread in Western NSW and the steps we have taken have been the right ones."

He added that should it be necessary, the ability to scale up further testing clinics is possible.

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