Currently, only five schools have been identified as containing RAAC – two schools on Anglesey, one in Conwy, one in Denbighshire and one in Newport.
Ar hyn o bryd dim ond pum ysgol sydd wedi cael eu nodi fel rhai sy'n cynnwys RAAC: dwy ysgol ar Ynys Môn, un yng Nghonwy, un yn Sir Ddinbych ac un yng Nghasnewydd.