The fire near the rodeo grounds off the Kings Highway was reported shortly before 11am, just minutes before another false alarm was reported to ACT emergency services.

An ESA spokesman said the "fire" at Pialligo was in fact dust, most likely from nearby construction work.

Tim Carroll from the Queanbeyan Rural Fire Service said fire activity had been minimal throughout the region as authorities enforced total fire bans across the ACT, Queanbeyan, Yass Valley and Goulburn regions.

In the capital region, firefighters are tackling a 60 hectare blaze near Yass, while volunteers continue to monitor a 21 hectare fire at the Kybeyan Valley near Cooma.