Frustration is growing in the community and from the Agfest committee that a cap on patron numbers are set at 10,000 per day, and a total of 40,000 over the four days.

However, a Public Health spokesman said a single positive COVID-19 case at the event would result in all patrons and exhibitors going into quarantine and free roaming events pose a bigger risk.

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"Free-mixing events pose a higher risk of spreading infection than do seated events because of the potential for anyone present at a particular time to interact with anyone else there at the same time," the spokesman said.

"This means that a single infectious case of COVID-19 at the event would see all attendees subject to testing and isolation or quarantine."

Over the weekend, the Agfest committee made a request to Public Health to increase the total patron cap per day to 15,000 people, but that request was denied.

However, the spokesman said DPIPWE continued to engage with the Agfest committee about options in which a higher daily cap could operate safely.

Community frustration stems from an easing of restrictions for ticketed events, coming into effect on May 1, which will see 100 per cent capacity and no masks returned to theatres and sport events.

READ MORE: Upping Agfest crowd numbers 'carries real risk'

"The recent experience of Western Australia demonstrates how quickly significant risk can arise, and the consequences," the spokesman said.

Tasmania has not had community transmission of COVID-19 for many months and recent wastewater testing has not found any trace of the virus in the stormwater.

However, the spokesman said negative wastewater testing did not rule out a case being present in the community.