NSW has recorded 239 new cases, with around 70 infectious in the community.
"Things are likely to get worse before they get better," Premier Gladys Berejiklian said.
Those who live in eight local government areas must wear a mask "as soon as they step outside their door".
Police are being given the power to close a workplace if a "flouting" of public health orders is observed.
The Premier announced yesterday greater Sydney's lockdown would continue, as well as regional restrictions as a new high for this outbreak of 177 was recorded.
Investigations continue into a new Victorian case in a traffic controller who was at a testing site - the remaining six local cases are all linked to current outbreaks and were in quarantine during their infectious period.
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