The document summarizes key statistics from the Welsh National Database for Substance Misuse about drug and alcohol treatment in Wales in 2014-2015. Some of the main findings include: referrals were highest among those aged 25-34 for both males and females; the most common sources of referrals were GPs, self-referrals, and criminal justice; cannabis and alcohol were the most common problematic substances; the number of people in treatment increased slightly from 2013-2014; and the most common treatment types delivered were psychosocial interventions, brief interventions, and harm reduction.