Victoria has recorded no new locally acquired coronavirus cases for the 25th consecutive day.
The Department of Health and Human Services' daily update revealed no local, interstate or overseas acquired cases in the past 24 hours.
The number of active COVID-19 cases in Victoria has decreased from 23 cases to 20, since yesterday, with 10,681 test results received in that time.
The state's streak of virus-free days has continued, despite detection of coronavirus fragments in wastewater across the state.
Following the detection of COVID-19 fragments in Gisborne, Leongatha and Hamilton last Friday, DHHS has added Castlemaine, Pakenham and Cowes to its list of affected suburbs on Saturday afternoon.
People who live in or have visited Castlemaine, Cowes, Hamilton and Pakenham between January 25 and 27 should remain alert for symptoms.
If you visited Gisborne between January 24 and 26 or Leongatha between January 17 and 19, DHHS advises you should also remain alert for symptoms.
Viral fragments in wastewater can be due to an active infectious case, but it can also be due to someone who has recovered from the virus and continues to shed it.
Wastewater testing will be increased to monitor trends in these areas and targeted testing may be implemented to help clarify the source, DHHS' website said.
Routine wastewater testing in December also detected COVID-19 fragments in Castlemaine on December 15.