NSW Health has identified several new exposure sites, after announcing the highest number of locally-acquired coronavirus cases since the outbreak began in June.
On Thursday, 38 new Covid cases were identified, and of the new cases, at least 20 people were out in the community for part or all of their infectious period.
Premier Gladys Berejiklian said residents of Greater Sydney and surrounds needed to further limit their movement and avoid mingling, and called on eligible residents to urgently seek out vaccination.
"This new variant is a game changer - there isn't anywhere on the planet that has managed to live with this variant, the Delta virus, without having a proportion of the population vaccinated," Ms Berejiklian said.
About nine per cent of the NSW population is vaccinated against Covid-19.
On Thursday afternoon, several new exposure sites were added to the growing list, including two supermarkets and a Vodafone store.
Anyone who is considered a "close contact" must immediately get tested and isolate for 14 days, regardless of the result.
New close contact venue in NSW:
Billy's Cars, Revesby, Sunday July 4 between 10am and 11.30am
Casual contacts must immediately get tested and isolate until a negative result is received.
New casual contact venues in NSW include:
Charlie's Grill Chicken and Seafood, Illawong, Saturday July 3 between 2.50pm and 3.10pm
Youies, Belmore, on Saturday July 3 between 8.30am and 1pm and on Sunday July 4 between 8.30am and 2pm
Aldi, Menai, on Sunday July 4, between 4pm and 4.30pm
Vodafone, Wetherill Park, on Sunday July 4 between 12.30pm and 12.40pm
Coles Wetherill Park Stockland, Wetherill Park, on Sunday July 4 between 12.30pm and 2.30pm
Fred's One Stop Shopping, Edensor Park, on Sunday July 4 between 1.30pm and 3.30pm
Suburbs put on high alert after sewage detection
The state's ongoing sewage surveillance program has detected fragments of the virus in the Boronia Park sewage network.
In a statement, NSW Health said authorities are not aware of anyone in the area being diagnosed with Covid-19 recently.
This is also the first time the virus has been detected in the Boronia Park sewage network.
The suburbs which are in the Boronia Park sewage catchment are:
Melrose Park, Camellia, Northmead, Constitution Hill, North Parramatta, Telopea, Denistone, Denistone West, Dundas Valley, Dundas, Carlingford, Oatlands, North Rocks, Ermington, Parramatta, Baulkham Hills, Rydalmere, Winston Hills, Woolwich, Huntleys Point, Huntleys Cove, Henley, East Ryde, Meadowbank, Gladesville, Tennyson Point, Putney, Hunters Hill, Denistone East, Ryde, Eastwood, West Ryde.
Because of this, NSW Health is urging anyone who lives or works in any of those areas to be "particularly vigilant for the onset of even the mildest of cold-like symptoms".
If any symptoms appear people should immediately get tested and isolate until a negative result is received.
Do you have a story tip? Email: email@example.com