The Ombudsman may investigate complaints about the work of Government Departments and Agencies such as the Planning and Environment Decisions Inspectorate.
Gall yr Ombwdsmon ymchwilio i gwynion mewn perthynas â gwaith Adrannau ac Asiantaethau’r Llywodraeth fel Penderfyniadau Cynllunio a'r Amgylchedd Cymru.