Victoria has recorded 35 days straight without any new coronavirus infections, paving the way for further restrictions to be eased come Sunday.

Mask rules will soon be relaxed in Victoria after the state recorded 35 days straight without any new coronavirus infections.

Chief Health Officer Brett Sutton has told a parliamentary inquiry it is safe for the state to move to a "COVID normal" level of restrictions on Sunday.

Under the government's original roadmap out of lockdown, "COVID normal" signifies the end of restrictions on community sport, hospitality venues, gatherings and visitors to the home.

Professor Sutton said authorities were still working through details ahead of Premier Daniel Andrew's Sunday press conference, but confirmed advice around masks, which currently must be worn in indoor settings, will change.

"It's to be determined this weekend, but we will move to a phase where there is an even more limited use of masks in public," he told the parliament's public accounts and estimates committee on Friday.

"But the recommendation for mask-wearing still exists around Australia, even in places where it hasn't been mandated at all.

"It is a kind of insurance for all of us in Australia, we don't know where another incursion into the country might come from."

On Monday five international flights from Colombo, Doha, Hong Kong and Singapore will land at Melbourne Airport as the state's revamped hotel quarantine program restarts.

International flights were diverted from Victoria in June after security guards at two quarantine hotels contracted COVID-19.

The outbreaks sparked the state's second wave, which resulted in more than 18,000 infections and 800 deaths.

The government announced on Friday it will introduce legislation to charge for the mandatory 14-day quarantine.

The fees will be set at $3000 per adult, $1000 for each additional adult in a room and $500 for children aged between three and 18 years. There will be no charge for children under three.

Emergency Services Minister Lisa Neville said the legislation will bring Victoria into line with other states and territories.

"It also ensures that when international flights to Victoria resume, we do not get a disproportionate number of returned travellers seeking to complete their mandatory quarantine period here to avoid the fees in other states," she said in a statement.

Ms Neville added there will be hardship considerations, including fee waivers, reductions and payment plan options.

There will be no security guards involved in the new-look program, with all staff employed or directly contracted by the government with the exception of cleaning staff, who are on fixed-term contracts with Alfred Health.

Hundreds of Victoria Police officers will act as security as well as undertake floor monitoring in "health hotels", which will house those travellers who test positive to COVID-19.

More than 150 Australian Defence Force personnel will support Victoria Police by helping guests on entry and exit, as well as registering staff movements and conducting temperature checks.

About 100 ADF members arrived on Friday afternoon and will begin their training on Saturday, with the remainder to arrive on Tuesday, a government spokeswoman confirmed.

Arrivals to Victoria will be initially capped at 160 travellers a day.

Meanwhile, the Department of Health and Human Services is investigating traces of COVID-19 detected in wastewater from the Daylesford, Hepburn and Hepburn Springs area.

Locals and visitors to the region last weekend are urged to get tested.

A testing push is already underway in the town of Colac, southwest of Melbourne, after it also recorded a positive wastewater sample.

Some 8784 Victorians were tested for the virus on Thursday.