Mae Arolwg Iechyd Cymru 2015 yn dangos bod 19% o oedolion wedi dweud eu bod yn smygu ar hyn o bryd, i lawr o 26% yn 2003/4. Mae'r lleihad sylweddol hwn yn golygu bod Llywodraeth Cymru eisoes wedi rhagori ar ei nod o leihau cyfraddau smygu i 20% erbyn 2016, ac mae ar y trywydd iawn i gyrraedd ei tharged uchelgeisiol i ddod â'r lefelau i lawr i 16% erbyn 2020.
The Welsh Health Survey 2015 shows 19% of adults reported they currently smoke, down from 26% in 2003/4. This significant reduction means the Welsh Government has already exceeded its aim of reducing smoking rates to 20% by 2016 and is well on track to achieve its ambitious target to reduce levels to 16% by 2020.