Denver County now at 'substantial' risk of COVID transmission - 9News.com KUSA

“Expect the unexpected,” said Tri-County Health Department Executive Director Dr.

The Tri-County Health Department represents Arapahoe, Adams and Douglas counties, all are currently listed as "substantial" according to the CDC.

“Which, by the way, includes all the counties in the metro area and the front range – that masks ought to be worn in indoor settings,” Douglas said.

“All of the metro counties have been above that 50 threshold for at least the last three days.

Denver's Department of Public Health and Environment (DDPHE) said Denver’s vaccination rates are high and hospitalization rates are low.