The largest annual decrease in fly-tipping incidents were in Gwynedd (46%), with considerable decreases in Wrexham, Flintshire, and Vale of Glamorgan (41%, 38%, and 35% respectively).
Cafwyd y gostyngiad blynyddol uchaf yn Gwynedd (46%) gyda gostyngiadau nodedig ym Wrecsam, Sir y Fflint, a Bro Morgannwg (41%, 38%, a 35% yn y drefn honno)