Tighter COVID restrictions were introduced for Wollongong and Shellharbour on Wednesday after another 23 NSW cases were recorded in Sydney.
Residents in Sydney, Blue Mountains, Central Coast, Wollongong and Shellharbour can not have any more than five visitors to a household, including children, until midnight next Wednesday when restrictions will be reassessed.
All customers at hospitality venues must again be seated to consume food or drink, while the four square metre rule will also be reintroduced.
Singing and dancing is also banned, with an exception for 20 people on a dance floor at weddings.
Sporting and outdoor events are recommended to reduce capacities to 50 per cent.
Masks are compulsory in all indoor settings, including workplaces, and at outdoor events such as sporting matches. Gym classes are restricted to 20, and masks must be worn.
The restrictions came as the Sydney cases jumped with a further 10 cases of community transmission reported to 8pm Tuesday night, and another 13 cases up to lunchtime Wednesday.
Eight of these 13 cases had attended a birthday party attended by about 30 people in West Hoxton on Saturday, which NSW Chief Health Officer Kerry Chant described as a "super spreader event".
She warned there were people "unknowingly" infected in the community.
An asymptomatic worker from Bondi Junction went to the party as did a father and a daughter. The child then went to her childcare centre 60km south-west of Sydney's CBD on Monday.
Little Zak's Academy at Narellan Vale confirmed it had been closed for deep cleaning.
The so-called Bondi cluster stood at 31 late on Wednesday after an unvaccinated Sydney airport limousine driver last week tested positive to the highly infectious Delta variant, which quickly started spreading at Bondi Junction's busy Westfield shopping centre.
"Please abandon non-essential activities, please don't attend social gatherings unless you absolutely must," the Premier said on Wednesday.
"I am not going to rule out further action."
Residents who live or work in the City of Sydney, Waverley, Randwick, Canada Bay, Inner West, Bayside, and Woollahra local government areas cannot travel outside the metropolitan area unless it's absolutely essential.
The metro area is defined as the Hawkesbury/Nepean River in the north/north west and the outer boundaries of the City of Penrith, Camden Council, the City of Campbelltown and Sutherland Shire.
NSW Health also advised late yesterday that its Sewage Surveillance Program has detected fragments of the virus that causes COVID-19 at the Cronulla sewage treatment plant and in the Bellambi sewage network.
"NSW Health is aware of recently confirmed COVID-19 cases who are in isolation in both the Cronulla and Bellambi catchments; however, we urge everyone in these areas [which cover all of Wollongong's northern suburbs] to be especially vigilant for any cold like symptoms. If they appear, please immediately be tested and isolate until a negative result is received," a spokesman said.
Meantime, Kiama and Shoalhaven residents who work in COVID-restricted areas such as Wollongong will have to abide by the restrictions in that area.
That means locals who work in Wollongong can not have any more than five visitors to their household, including children.
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