In 2021-22, 65% of deliberate fires were in South Wales, over a quarter in Mid and West Wales, and almost a tenth were in North Wales.
Yn 2021-22, roedd 65% o’r tanau bwriadol yn Ne Cymru, dros chwarter yng Nghanolbarth a Gorllewin Cymru, a bron i ddegfed yng Ngogledd Cymru.