Coronavirus case numbers continue to climb in Colac, with 27 positive cases now recorded in the region, more than doubling yesterday's numbers.

New Department of Health and Human Services local government area data shows 27 active cases in the Colac Otway Shire region, up from 12.

Only 13 of those are understood to be linked to the Australian Lamb Colac cluster.

Colac Area Health tested 413 people through its drive through clinic and 17 through its COVID clinic on Monday.

On Sunday 144 people were tested at the drive through clinic and 89 through the COVID clinic.

A new case has also been recorded in the Corangamite Shire, the first for the municipality since the start of the pandemic.

Mayor Neil Trotter said it was a concern to see a positive case in the shire.

"I have no knowledge of where the case is at this stage, when you're seeing so many cases in Colac it is concerning."

There are four cases in Portland, comprising of three Glenelg Shire residents and one Melbourne resident.

There are nine active cases in Ballarat, four in Horsham, Greater Bendigo and Surf Coast, and 18 in Greater Geelong.

Earlier, 11.30am:

Premier Daniel Andrews has said there are no plans to lock down the Colac Otway Shire, despite calls from the town's mayor for the government to take harsher measures to stop COVID-19 spread in the community.

On Tuesday morning Mr Andrews said every worker at Australian Lamb Colac has been considered a close contact and told to isolate for 14 days.

"We're not at the point where we will bring the whole local government area in lockdown, but things can change," he said.

"We don't have any advice that there needs to be a different set of rules for that area.

"There have been some comments around this and they have been simply wrong, the abattoir has been shut down and every single staff member has been told they are a close contact.

"We've got the biggest team we've ever had dealing with the biggest challenge they've ever faced, and that team will continue to get bigger.

"It's not as simple as it seems."

An Australian Lamb Colac spokesman confirmed on Tuesday all of the company's 730 employees have been tested.

All ALC tests are being processed in a lab in Geelong and the facility will close for at least 14 days.

He said ALC is currently looking at alternative processing options, however lamb supply over the coming period will be "greatly affected".

Earlier, 10.30am: Colac Otway Shire mayor Jason Schram says a two-week lockdown is needed to stop the further spread of coronavirus through the community.

So far 13 people in the Colac community have tested positive for coronavirus after an abattoir worker confirmed a positive test last week.

READ MORE: Colac meat worker returns positive coronavirus test

More than 1000 people in the Colac community have been tested for the virus so far and a second testing clinic is being set up today.

Mr Schram fears it will be 'weeks' before the virus is eliminated from the town and believes the government should have reacted faster.

"As soon as the first worker tested positive the government should have been straight down to Colac to enforce a quick lockdown so that everyone could be tested and contract tracing carried out to alleviate fear and stop the spread," he said.

"Most people in Colac have taken it upon themselves and gone into their own lockdown which just shows the strength of community spirit out here.

"A bit more of a response from the government would have been good, we're a regional area with a large employer, we've seen around the world and even in Victoria that meatworks are a breeding ground for the virus."

He said around 50 per cent attendance has been recorded at schools that haven't closed and businesses have nominated to either close entirely or continue to operate behind closed doors.

He said he was not contacted by the health department after the first case was confirmed.

"As the local government we're the connection to the local people and as the mayor I didn't have a single phone call from DHHS or the government letting us know it was in our community or even give us extra advice," he said.

"We're lucky our community has banded together and stepped up our own restrictions, it's been fantastic.

"The government need to jump on top of these cases and get them back to zero in our community."

He said some people were getting their COVID-19 test results back within 24 hours, but others were waiting longer.

"To think that the initial guy waited a week for his result, and his family member went to school for a week in that time, it's not good."

Cobden Health has locked down its residential aged care facilities.

Until further notice, no visitors will be permitted to enter and all staff will be required to wear a face mask, which will be supplied by the organisation. Staff temperatures will continue to be checked and recorded daily.

Barwon, Child, Youth and Family have advised parents and carers that Colac's Winifred Nance Kindergarten is temporarily closed following notification that a family member of a child attending the kinder has tested positive for COVID19.

Colac's St Mary's Primary School and Sacred Heart Primary School have encouraged students to stay home. Students of essential workers can still attend.

The Catholic Education Office advised the schools to encourage students to stay home to avoid the spread of coronavirus.

Coragulac's St Brendan's Primary School has elected to remain open but contacted parents of children with siblings at Trinity College to give them the option to keep their children at home if required.

Trinity College Colac will be moving to remote learning for our entire school commencing Thursday, July 23 through until Friday, July 31.

Another of Colac's major employers, Bulla Dairy Foods, has required visitors to its Colac site to wear masks.

Colac Otway Shire council has closed its Bluewater complex, COPACC and customer service centre.

Colac Area Health's drive-through COVID-19 testing is operating today at Colac's Central Reserve from 9am to 4.30pm.

Colac's temporary Connor Street drive-through testing site will close, but the hospital's COVID-19 clinic on Connor Street will remain open.

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