On the same day Murrumbidgee Local Health District confirmed there was a further three cases reported for Young until 8pm on Sunday evening bringing the total number of cases to seven.

WNSWLHD Chief Executive Scott McLachlan said the Cowra case is in isolation with their household contacts outside of the Cowra township, however has been identified as likely being infectious in the community.

"Investigations and contact tracing are ongoing to formally identify all close or casual contacts and venues of concern," Mr McLachlan said.

"I urge the community to keep a close eye on the venues of concern available on the NSW Health website and if you are contacted by NSW Health or identified as a close or casual contact, to follow the advice you are given.

"We have determined the confirmed case is unlikely to be the source of recent virus fragments detected in sewage samples taken from Cowra.

"This is further proof that COVID-19 is still creeping around our communities, even those which haven't previously been impacted."

Meanwhile in Young, MLHD also confirmed on Sunday evening there were three new positive results two of which are household contacts, bringing the total number of cases in Young to seven.

"There have been three new confirmed cases of COVID-19 identified in the Hilltops Local Government Area today, Sunday 19 September," a MLHD spokesperson said.

"They are two household contacts, a man in his 40s and a woman in her 70s, and then a further man in his 50s.

"The two men are isolating in their respective homes under the care of MLHD. The woman has been transferred to Wagga Wagga Base Hospital."

Five of the seven cases are currently being cared for at Wagga Base Hospital.

"Investigations and contact tracing are ongoing to identify all close and casual contacts, and any venues of concern," the MLHD spokesperson said.

The following locations are new venues of concern associated with confirmed cases of COVID-19.

Anyone who has visited one of these venues at the times listed below is a casual contact and should immediately get tested and isolate until a negative result is received.

The already reported exposure sites are:

Western NSW Health District said they had conducted a total of 136 tests in Grenfell over the weekend.

Murrumbidgee Local Health District reported they conducted 902 tests in Young at the Town Hall pop-up clinic and the Young Mosque clinic between Saturday and Sunday.