For the third consecutive day there are no new cases of locally acquired COVID-19 in NSW, while five cases have been diagnosed in returned travellers in hotel quarantine.
NSW Health said there were 10,058 tests undertaken in the 24 hours to 8pm on Monday night, compared with 9499 in the previous 24 hours.
NSW Health is treating 70 COVID-19 cases and there are no patients in intensive care.
Testing figures showed there had been a good response from the Southern Highlands community to the call for people to get tested, particularly among people living in Moss Vale, a statement said on Tuesday.
NSW Health continues to urge everyone, but especially people in the Southern Highlands, southwestern Sydney and the Rouse Hill area, to get tested, even if they are experiencing only mild symptoms, such as a runny nose or scratchy throat, cough, or fever.
This follows the diagnoses of cases in Moss Vale and southwestern Sydney recently, and detection of virus fragments in sewage sampled from Rouse Hill and Liverpool last week.
"NSW Health continues to call on people to remain vigilant in the fight against COVID-19 and to work together to minimise community transmission as the risk of a resurgence of cases remains," the statement said.
Commuters were urged to wear a mask when using public transport, ride shares and taxis, and in shops, places of worship and other places where physically distancing was impossible.
Meanwhile, the NSW government stopped short of mandating masks on public transport, instead introducing a new app feature that predicts when trains will be crowded.
Transport Minister Andrew Constance announced the "world first" initiative on Tuesday, saying it would be crucial as people returned to the office with more people catching public transport while fewer were wearing masks.
The Opal Travel app will use real-time data from registered Opal cards and loading patterns on Sydney trains to predict whether a commuter's usual train service is too crowded, and whether physical distancing will be breached.
A push notification will then be sent to the traveller's phone, on an opt-in basis.
Unions and the NSW opposition have been calling for mandatory masks on public transport for months, while Mr Constance acknowledged not enough commuters were heeding calls to wear them.
"Not enough people are wearing masks ... I just caught a train on the Eastern Suburbs line and nobody had a mask on," he said.
"We don't want to have to mandate it. We don't want to put in place measures, be it fines or denying people service."
