Portland District Health chief executive Chris Giles said due to high demand for testing in the region, people were being advised to expect their results within five to seven days.

This is despite Premier Daniel Andrews saying the average wait for test results was two days.

"It is concerning but regardless of how long it takes, people need to self-isolate," Ms Giles said.

She said this meant people needed to stay home until they had received a negative result.

Ms Giles said Portland District Health was doing everything it could to ensure as many people as possible could undergo testing.

She said there would be a pop-up clinic in Heywood operating from Tuesday.

"We want to make it really clear that people need to get tested - even if they have mild symptoms and then go home and self-isolate," Ms Giles said.

There are currently seven active cases in the Glenelg Shire.

Ms Giles said people needed to ensure they follow the advice received from the Department of Health and Human Services.

This may mean isolating for 14 days if they have been in close contact with someone who has tested positive to COVID-19 - even if they have returned a negative test.

A state government spokeswoman said Victoria's coronavirus testing regime was among the highest per capita in the world - with more than 1.5 million tests processed to date.

"In most cases it takes around two to three business days from the time of the test to the confirmation of the result, but there may be cases where this is longer," the spokeswoman said,

"Results are then communicated to the patient via phone call or text message depending on the lab or health service which processed the results."

A Warrnambool resident who was tested on Thursday received her results on Monday.

On Monday it was revealed the number of active cases in Warrnambool remains at one, while the number in Colac rose to 50.

The active Warrnambool case is linked to the coronavirus cluster in Colac, South West Healthcare revealed.

South West Healthcare chief executive officer Craig Fraser said the person was in self-isolation.

"This is, again, a timely reminder to all of us to do the right thing by maintaining good hand hygiene and respiratory etiquette, and physically distancing," Mr Fraser said.

"We expect to see more positive cases and we need to focus on preventing local community transmissions. Given our close connections with Colac, we need to do everything we can to ensure a similar event does not occur in our local communities.

"We continue to enjoy and be allowed to do so many more things than people in lockdown in Melbourne and Mitchell and this will only be sustained by preventing the spread of this deadly virus.

"We encourage everyone to be kind and caring to anyone who has COVID-19 or is awaiting their test results.

"This is an awful disease that no-one chooses to get and this is a time to be considerate and assist and support people, whilst keeping your distance.

"It's imperative that if you have any symptoms you get tested and then isolate until you get your results. And if you're living with a close contact you must live completely separate from this person, as directed by the DHHS contact tracing team.

"We're in a really positive place and by doing the right things we can maintain this. On behalf of everyone here at South West Healthcare, we sincerely thank you for taking the vitally necessary measures to help keep our communities safe, and for your calm, positive and caring messages."

There was a downgrade of the number of cases in the Glenelg Shire Council from seven to six.

However, Member for South West Coast Roma Britnell has called for greater detail about cases after some confusion about where people tested live.

Ms Britnell said a postcode system would be best, especially in local government areas that cover hundreds of square kilometres.

"That's the type of information that needs to be made public, we don't want names or addresses, we just want to know if this case is actually in Warrnambool or not and we want all agencies getting all the information at the same time." she said.

"We are in a health emergency, and when in any type of emergency, the most important thing is up-to-date and relevant information.

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