COVID-19 Disaster Payments of $600 will be available for people who have lost 20 or more hours of work a week or $375 for those who lost between eight and less than 20 hours of work a week.

Businesses and not-for-profits who have maintained their staffing levels as of July 13 will be eligible for payroll subsidies of up to $10,000 per week.

Mr McCormack said Riverina businesses and residents would be eligible to apply for the assistance packages in coming days.

"On top of this, the federal government is providing additional support by making NSW small business grants tax exempt as well as providing tax relief by reducing payment plans, not charging interest on late payments and adjusting pay instalments when requested," he said.

"The federal and NSW state governments are also increasing mental health support for those who need it through a $17.35 million support package, including boosting crisis and mental health services, such as Lifeline.

"These measures will ensure those who need assistance will receive support."

Labor duty Senator for the Riverina Deborah O'Neill said many people in the region desperately needed financial support.

"But people wouldn't need this package if Scott Morrison got the roll-out of the vaccine done properly, if vaccination rates were up, and if we had proper federally run, purpose-built, quarantine facilities," she said.

"The people of NSW, and people right around Australia have been hurting while the Prime Minister has been hiding."

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Applicants for COVID-19 Disaster Payments need to be aged 17 years or older and not receiving any other Centrelink income support payment.

Senator O'Neill claimed some people would fall through cracks in the NSW assistance package.

"Workers and small businesses in NSW wanted something like JobKeeper which would maintain the link between employer and employee, and they got something which falls far short of that," he said.

"Then there's the issue of workers who were already laid off before yesterday - they've been left in the lurch. This package does nothing for them."

Small and medium businesses and not-for-profits with an annual turnover between $75,000 and $50 million will be eligible to receive 40 per cent of their NSW payroll payments at a minimum of $1500 and a maximum of $10,000 per week.

Applicants will also have to show that their turnover is 30 per cent lower than an equivalent fortnight in 2019.

Business NSW Murray-Riverina regional manager Anthony McFarlane said the payments would save jobs and keep businesses open in the region.

"Business NSW ran a lockdown impact survey, which closed on Tuesday, and one n five businesses across NSW have told us that they only have a money of cash flow to keep them going, so this package is certainly timely," he said.

"Both the payments to individuals and businesses will keep a level of activity in the Riverina economy.

"Businesses in the Riverina have been impacted not only by the Greater Sydney lockdown but the Victorian border closure as well, through the loss of school holiday trade and also cancellations of forward bookings putting pressure on cash flow."

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