“Locally, there are 420 new cases in Toronto, 169 in Peel, 95 in York Region and 58 in Ottawa,” Health Minister Christine Elliott wrote on Twitter.
Over 35,600 tests have been processed in the last 24 hours, compared to 30,000 in the previous period.
The positivity rate fell to at least 2.62%, from at least 2.77% on Wednesday.
Infectious disease expert Dr Isaac Bogoch told CP24 that the province is still failing to test enough people so it can be sure all cases are documented.
“It’s a little hard to know because the number of tests is limited,” he said. “We know we should be doing 50,000 tests a day, but we’re probably doing around 25,000 to 33,000 tests a day, so the truth on the ground is not entirely clear.
The province reported 834 new cases Wednesday, 827 cases Tuesday, 851 cases Monday and 1,046 cases Sunday.
There are now 7,578 active cases of infection in Ontario, up from 6,390 a week ago.
There have been 3,118 centrally confirmed deaths and 63,123 recoveries since January 25.
Of the ten deaths reported Thursday, five were to residents of long-term care homes.
The Toronto Public Health Department said the 420 cases reported Thursday represented a record number of positive tests in one day.
Elsewhere in the GTA, Halton Region has reported 35 new cases, Durham Region 19 and Hamilton 28 new cases.
The province says 322 people were in hospital and being treated for symptoms of COVID-19, but a data tally from public health units and local hospitals found 337 people were in hospital, the same number than the one found on Wednesday.
Of those, at least 77 were in intensive care and 52 were breathing using a ventilator.