Responsibility for the enforcement of reservoir safety in Wales rests with Natural Resources Wales (external link) and they will be responsible for identifying the reservoirs that are at risk.
Cyfoeth Naturiol Cymru (dolen allanol) sy’n gyfrifol am orfodi mesurau diogelwch ynghylch cronfeydd Cymru a nhw fydd yn gyfrifol am nodi’r cronfeydd sydd mewn perygl.