Canberra has recorded 17 new coronavirus infections, nine of which can be linked to known sources.
Just one of Wednesday's cases was in quarantine throughout their entire infectious period, while at least 11 spent time in the community.
"The potential risk from the cases announced overnight, particularly the number that has been in the community, is of concern," Chief Minister Andrew Barr told reporters in Canberra.
A little over 81 per cent of the ACT's eligible population has received one vaccination and 56 per cent are double-dosed.
Mr Barr excepts full vaccine coverage to exceed 95 per cent.
He has expressed frustration at continued non-compliance with mask-wearing in businesses allowed to operate under Canberra's stay-at-home restrictions.
“Our compliance teams will continue that focus, continue to remind businesses, those who have already been reminded will not be shown the courtesy of further reminders at this point," he said.
There are 222 active infections in the ACT, with 12 people in hospital including two in intensive care requiring ventilation.

ACT Chief Minister Andrew Barr speaks to the media during a COVID-19 update in Canberra, Tuesday, September 14, 2021. Source: AAP
The Australian Defence Force will be assisting ACT police with border checks from Wednesday.
Twenty-three ADF members will be helping police with traffic management at Canberra's borders until 31 October.
With SBS News