The number of new cases of COVID-19 identified in the Coonabarabran community has shrunk slightly today as residents continue to turn out in droves for testing.

The new cluster - which first came to light last week - caught the town, which hadn't seen a case identified during the Western Plains outbreak earlier this year, by surprise but residents have been quick to get tested and isolate where necessary.

Deputy Mayor of Warrumbungle Shire Council Aniello Ianuzzi, who also operates a private medical practice in Coonabarabran, said he had been thrilled by the community response.

"I think the turnout has been outstanding - there's no other way to put it - and it's allowing us to get a good feel for the extent of the outbreak," Dr Ianuzzi said.

"I was also glad to learn today numbers are significantly lower than they were a few days ago. There's no guarantee, because you do get variations in numbers day-to-day, but it is a sign of hope we are already on the downward trend."

Of the 11 new cases identified in the Western NSW Local Health District (WNSWLHD) up to 8pm last night, four were in the Warrumbungle shire, with three in Coonabarabran.

The remaining new cases were from Orange (five), Dubbo (one) and Bathurst (one).

According to the WNSWLHD, one of the three Coonabarabran cases was a household contact while the other two are still under investigation.

A further 427 COVID-19 tests were conducted in Coonabarabran yesterday, taking the total number of tests since last Friday 19 November to 1620.

The drive-through testing clinic remains open at Coonabarabran Health Service on Cassilis Street from 8.30am to 1pm.

At this stage, there has been no indication the virus has spread to any surrounding Western Plains communities from the Warrumbungle shire.

However, Dr Ianuzzi said it was important to recognise that wasn't a certainty.

"I think the virus is quite widespread so we can't be certain saying it hasn't spread further," he said.

"However, this outbreak does seem to be confined to here at the moment and I do hope these lower numbers are sustained and we can look to return to some kind of normalcy after next week."

Dr Ianuzzi hoped this would see the return of workers and customers to local businesses, with many business owners - including himself - sending staff home for sick leave while isolating and limiting the intake of customers and clients to prevent potential spread.

Members of the Cobar community showing symptoms of the virus have also been urged to come forward for testing following a recent sewage detection.

Residents can get tested at the Cobar Respiratory Clinic on Harcourt Street from 9am-1pm every weekday or the Cobar Multi-Purpose Service Clinic on Woodiwiss Avenue at 8.30am, 11am and 3pm.

According to WNSWLHD, only 10 tests were done in the town yesterday.

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