During the live update on the state's COVID-19 status on August 4, Dr Kerry Chant confirmed the discovery made by NSW Health's sewage surveillance program on Monday, August 2.

"We have had low levels of detection from the Mudgee Sewage Treatment Plant," Dr Chant said.

"We want to see high rates of testing there to make sure there isn't any unrecognised transmission in the community."

The Mudgee Sewage Treatment Plant services approximately 12,000 residents across the area.

South Mudgee Surgery GP, Dr Alex Ghanem said while it is unclear whether the case is live, residents are reminded to 'stay calm'.

"We don't know whether this is a historical positive, someone who has passed through or someone recovering from COVID. It doesn't necessarily mean an active case," Dr Ghanem said.

"We would strongly urge people who have symptoms to make an appointment at the Mudgee Respiratory Clinic and to stay away from the hospital if they do not require hospital care.

"We remind people to remain calm, wear masks and avoid large gatherings.

"This is a very serious pandemic, it's only a matter of time before all of NSW is exposed in some shape or form."

To date, the Mudgee Respiratory Clinic has delivered 7,300 doses of AstraZeneca and Pfizer, respectively, 800 of which are second doses.

Western NSW Local Health District Chief Executive Scott McLachlan said it was another timely reminder of the serious risk COVID-19 continues to pose.

"As it stands, the sewage detection at Mudgee is unable to be traced to an individual so we must continue to be vigilant," Mr McLachlan said.

"High testing rates help us to detect any cases of COVID-19 as early as possible. I encourage anyone who is symptomatic to come forward for testing.

"I'd ask that everyone please be patient when coming forward for testing."

Symptoms of COVID-19 include:

A pop-up COVID-19 testing clinic will be set up at AREC from 2pm until 5pm on Wednesday, August 4 and 8:30am until 5pm on Thursday, August 5.

Testing sites will also be established at the Gulgong Showground and Rylstone Showground on Thursday and Friday, from 9am to 3pm at both sites.

Alternatively, to make an appointment at Mudgee's Respiratory Clinic, visit hotdoc.com.au or phone 6362 4031.

The Mudgee vaccination clinic is located at the Mudgee Showground Pavilion, Monday to Friday (excluding public holidays) from 1pm to 5pm.

Our journalists work hard to provide local, up-to-date news to the community. This is how you can continue to access our trusted content: