In the Australian Capital Territory in 2009-10, 10 publicly funded alcohol and other drug treatment agencies provided 3,585 treatment episodes. Alcohol was the most common principal drug of concern (55%), followed by cannabis (17%) and heroin (14%). These proportions were similar to the previous year. Episodes reporting amphetamines as their principal drug of concern dropped by 3 percentage points from 9% in 2008-09 to 6% in 2009-10. The most common form of treatment in 2009-10 was counselling accounting for 30% of treatment episodes, followed by withdrawal management (21%).