The largest annual decrease in fly-tipping incidents was in Powys (60%), with considerable decreases in Merthyr Tydfil (36%), Conwy (33%), Pembrokeshire (26%) and Isle of Anglesey (24%).
Cafwyd y gostyngiad blynyddol uchaf yn Powys (60%) gyda gostyngiadau nodedig ym Merthyr Tydfil (36%), Conwy (33%), Sir Benfro (26%) ac Ynys Môn (24%).