Update, 2.10pm: The Department of Health and Human Services has recorded three less cases in regional Victoria, bringing total active cases to three.
There remains one case in Colac-Otway Shire, while all other postcodes in the south-west corridor have been cleared of the virus.
The following local government areas in the south-west now have zero recorded cases: Warrnambool, Moyne, Corangamite, Glenelg, Southern Grampians, Geelong, Horsham, Moorabool, Golden Plains, Surf Coast, Bendigo and Ballarat.
Of the 305 current active cases in Victoria:
- 302 are in metropolitan Melbourne under the Second Step of our roadmap
- Three are in regional local government areas under the Third Step of our roadmap
- 0 are interstate residents
- 0 are either unknown or subject to further investigation
Quarter of meat workers to be tested every week as 13 new cases, four deaths recorded
There have been 13 new cases of coronavirus and four deaths recorded in Victoria overnight.
It brings the state's total deaths to 798.
Meat processing workers will also be regularly tested as part of new surveillance testing for high-risk industries.
There have been no new cases recorded in regional Victoria with just three active cases, a decrease of three on yesterday.
The 14 day rolling average from September 16 to 29 is 16.4 in metropolitan Melbourne and zero in regional Victoria.
There are 21 cases with an unknown source in metropolitan Melbourne and zero in regional Victoria.
Let's not let fatigue get the better of what the science, the data and the doctors are telling us.Premier Daniel Andrews
Of the deaths overnight: one was a woman in her 70s, one woman in her 80s, and one man and a woman in their 90s.
Two of those deaths are linked to aged care.
There are 44 Victorians in hospital, six are in intensive care and three are on ventilators.
2.69 million tests have now been processed, with 17,937 Victorians coming forward to get tested yesterday, up from 8326 the day before.
There have been 4272 cases of an unknown source, a decrease of one.
Of the active cases in Victoria, three are linked to known outbreaks and complex cases, seven are under investigation and one has been reclassified.
46 active cases are healthcare workers, there are 147 active cases in aged care and one in disability facility staff.
Premier Daniel Andrews announced the regular testing of aged care workers.
Regional aged care staff will be tested every month and metropolitan workers will be tested every fortnight.
Workers who are asymptomatic not linked to an outbreak are not required to isolate while awaiting their results.
Jeroen Weimar, heading up testing for the Department of Health and Human Services, said over 160,000 people have been tested in Victoria over the last two weeks.
96 per cent of tests have been returned within one day.
For every 474 tests in metropolitan Melbourne, one positive case is found.
For every 3300 tests a positive case has been found in regional Victoria.
The World Health Organisation requires a minimum of 30 cases for every positive case.
Coronavirus fragments have been found in sewage at Anglesea despite no positive cases in the area.
A testing site has been set up there.
"It could be someone passing through or it may be somebody not yet aware they have coronavirus," Mr Weimar said.
Barwon Health infectious diseases specialist Associate Professor Daniel O'Brien said Barwon Health is assisting with testing in Anglesea.
"Wastewater testing at Anglesea has identified positive traces of the virus that causes coronavirus, which may be related to previous cases or people travelling through the area, or it may indicate an undiagnosed case in the area," he said.
"Barwon Health is assisting with clinical testing in Anglesea, and our advice remains the same as elsewhere - if residents have COVID-19 symptoms, no matter how mild, they should get tested.
"Walk-in testing for coronavirus is available at the Anglesea Memorial Hall from now until Sunday, 10am to 6pm, with no appointment required.
"Wastewater testing at Anglesea is part of a national collaboration to understand the occurrence of coronavirus viral fragments in wastewater systems."
Surveillance testing for high risk industries
Meat processing workers will be regularly tested as part of new surveillance testing for high-risk industries.
25 per cent of workers in the meat, poultry, seafood processing and supermarket and refrigerated distribution centres will now be tested every week.
Around 28,000 workers across 95 businesses work in these industries in Victoria.
Rapid response testing teams will be deployed to regional and rural workplaces.
"These industries are not dangerous but we know if virus enters there's a higher risk of spread," Mr Weimar said.
"A quarter of staff will be tested for every week for the foreseeable period.
"By the middle of October we expect the first 25 per cent of the force to be tested.
"It's important to ensure we understand where the virus is circulating, it's not an indication that people need to wait for that surveillance testing to come back.
"You can continue to work if you are asymptomatic, you don't need to isolate unless you do become symptomatic."