The state's capital has a far higher number of coronavirus cases than the country, but Albury's number is now at four and is expected to keep rising.

But all of those cases involve people returning from overseas and the premier said it was important those arriving from abroad could get back to their home towns.

"Having one rule for NSW makes it clear for all of our citizens that NSW has a certain set of rules that everybody abides to," Ms Berejiklian said.

"We've discussed at length with colleagues and health authorities and we believe it's appropriate to have one set of standards across the state.

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"Many people coming from overseas or coming off ships are actually from regional NSW.

"This is as much about containing the spread everywhere."

She said when the number of community transmissions of coronavirus started to rise in NSW, the state would put in place stronger restrictions than those announced by Prime Minister Scott Morrison.

"We're not there yet, but that threshold is critical because it allows NSW, and Victoria for that matter, to take action advance of other states, which is exactly the position I've argued right from the beginning," she said.

The NSW government has also released a map of "locally acquired cases and clusters".

It confirms there are no locally acquired cases in Albury or the Riverina, and no more than four in a single local government area across the state.

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