In a weekly surveillance report published by NSW Health on Friday, testing which was carried out in the week prior found no fragments of COVID-19 at Orange's sewage treatment plant.

The NSW Sewage Surveillance Program test was the first to be undertaken in Orange since a man who tested positive to the virus visited Birdie Noshery & Drinking Est on January 3.

In the week ending January 9, the Orange sewage sample was among 110 which was tested for fragments of coronavirus.

Of these, there were 16 detections in samples taken from Ulladulla, Glenfield, Quakers Hill, Warriewood, West Hornsby, Bondi, North Head, Malabar, and Camellia North and Northmead sewage pumping stations.

According to NSW Health, testing sewage can help track infections in the community and provide early warning of an increase in infections.

"An infected person can shed the virus in their faeces even if they do not have symptoms, and shedding can continue for several weeks after they are no longer infectious," the report said.

Testing of Orange's treatment plant will continue.

A NSW Health spokesperson confirmed there were no positive cases of COVID-19 in the Western NSW Local Health District (LHD), adding that in the week following the public health alert, there was a significant increase in testing "across most age groups in Far West LHD and Western NSW LHD".

"The best thing any of us can do for our families, friends and communities is to get tested immediately if we experience any cold- or flu-like symptoms, no matter how mild, then isolate until a negative result is received," the spokesperson added.

"If any of your friends or family have symptoms, please urge them to get tested, too."

To find your nearest COVID-19 testing clinic visit: nsw.gov.au/covid-19/how-to-protect-yourself-and-others/clinics.

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