The largest annual decrease in fly-tipping incidents were in Merthyr Tydfil (36%), with considerable decreases in Neath Port Talbot, Carmarthenshire, and Gwynedd (22%, 22%, and 20% respectively).
cafwyd y gostyngiad blynyddol uchaf yn Merthyr Tudful (36%) gyda gostyngiadau nodedig yng Nghastell-nedd Port Talbot, Sir Gaerfyrddin, a Gwynedd (22%, 22%, a 20% yn y drefn honno).