Turbulence causes fire-fighting aircraft to dump 2,500 litres of retardant on Canberra road

Cars have been doused in pink fire retardant after a fire-fighting aircraft accidentally lost 2500 litres over a road and park in Canberra.

ACT Fire and Rescue said the aircraft had encountered turbulence about 3.30pm AEDT on Wednesday, causing the loss of the non-toxic retardant over Parkes Way, Rond Terrace and Anzac Parade.

The emergency service said residents whose cars were covered in the retardant have permission to wash them with water.

"A number of vehicles may have been covered with a light pink dust. Anyone who has been directly affected is advised to wash their vehicle down with water," said ACT Fire and Rescue.

"The retardant is non-toxic and there is no immediate risk to the health and safety of people or property.

"If irritation occurs seek medical advice at your GP or walk-in centre."

Members of the Environmental Protection Authority are currently on scene assessing the site.

Concerned residents affected by the accident can call Access Canberra on 13 22 81.