UPDATE Sunday 6pm: Katoomba Sports and Aquatic Centre will reopen tomorrow Monday, September 14 at 6am.
NSW Health advised that anyone who visited the centre between 11.30am and 1.30pm on Friday, September 4 should continue to monitor for symptoms of COVID-19.
A person who visited the centre at that time tested positively to the virus on Friday, September 11.
Council staff, who were also at the facility on September 4 and elected to undertake COVID-19 testing, have received negative test results.
A deep clean of the centre will be completed today [Sunday], so that the centre will be ready to reopen tomorrow.
Friday, 6pm: The Katoomba Sports and Aquatic Centre has been closed until further notice after a person who visited the centre on Friday, September 4 has tested positive to COVID-19.
The centre will be deep cleaned. NSW Health notified Blue Mountains Council late on Friday, September 11 of the positive case.
A council spokeswoman said they had started notifying staff and members of the community who were registered as being on-site at the facility on that day.
NSW Health has ordered those who were at the centre between 11.30am and 1.30pm on September 4 to quarantine until Friday, September 18.
Mayor Mark Greenhill said: "My immediate concern is for the community and council staff who may have been present at the facility on that day. My thoughts are with them. This will be a nervous time.
"Our team will be giving them every support possible and liaising with NSW Health throughout the quarantine period.
"We take this matter extremely seriously."
A COVID-19 drive-through testing clinic is available at Blue Mountains Hospital, and can be access via Woodlands Road Katoomba. Opening hours are 9am-12.30pm and 1pm-4pm 7 days per week.
For more information on COVID-19 clinics, visit the Nepean Blue Mountains Local Health District website.