Ms Stanley and WNSWLHD chief executive Scott McLachlan took questions from the region's media at a virtual meeting on Tuesday afternoon as they waited for the results of further testing of Dubbo's sewage on Monday, August 9.

COVID-19 virus fragments were detected in samples taken from the Dubbo Sewage Treatment Plant on August 3 and August 5.

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Specialist testing of the samples is undertaken by Sydney Water.

Ms Stanley said ongoing detections "certainly would trigger a conversation with our chief health officer and discussion as to what the best approach and best method is for reducing the spread or trying to contain the spread and the risk in our regional areas, particularly where we have seen those detections already in Dubbo and Mudgee".

Mr McLachlan told of a "deadly virus sweeping across NSW" when imploring Dubbo residents to get tested.

He applauded the about 590 tests conducted in the city on Monday but told of a "drop off" in numbers on Tuesday.

The chief executive officer wants to see 10 to 15 per cent of Dubbo's population tested daily.

COVID-19 virus fragments were detected in samples taken from the Mudgee Sewage Treatment Plant on August 2 and August 4.

More than 2100 COVID-19 tests of people in the Dubbo and the Mudgee area have taken place since Saturday.

On Tuesday afternoon Mr McLachlan advised of "no new cases" within the boundaries of the health district in the previous 24 hours.

He also confirmed the district no longer had an active case.

Mr McLachlan said a man from Molong had "successfully recovered from his infection".

Testing is available at Dubbo Showground and Manera Plaza.

For information on COVID-19 testing locations go to www.nsw.gov.au.

The NSW Sewage Surveillance Program tests untreated sewage for fragments of the COVID-19 (SARS-CoV-2) virus at more than 60 sewage treatment plants across the state.

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