The pool is split between the 22 county and county borough councils and the four police and crime commissioners, and is distributed between each authority according to shares of adult population.
Caiff y gronfa ei rhannu rhwng y 22 o gynghorau sir a phedwar comisiynydd yr heddlu a throseddu a'i dosbarthu rhwng pob awdurdod yn ôl cyfrannau o'r boblogaeth oedolion.