For the second time since the weekend Young has recorded a positive result with the area announced on Saturday and then Tuesday.

Hilltops Council and NSW Health have confirmed that the first positive test result was from testing conducted on September 7 and the second was from September 12.

"NSW Health's ongoing sewage surveillance program has recently detected fragments of the virus that causes COVID-19 at the Young sewage treatment plant in Murrumbidgee Local Health District," NSW Health's Dr Jeremy Mcanulty said.

Locals are being urged to go and get tested and monitor for symptoms as the positive result continues to cause concern.

"No recent cases have been identified in Young, so everyone is urged to monitor for the onset of symptoms, and if they appear, to immediately be tested and isolate until a negative result is received," Dr Mcanulty said.

This announcement is on the back of Yass Valley Council going into a snap 14-day lockdown on Monday afternoon after a positive case was detected in the area.

New stay-at-home restrictions are now in place for the Yass Valley Council area for two weeks.

A case of COVID-19 was confirmed in the area on Monday, following a recent positive sewage detection.

Urgent investigations and contact tracing are underway.

Anyone from the local area who visited or has been in Yass since September 9 is required to follow the Stay-At-Home orders.