Most local authority completions were accounted for by Flintshire (with 34 local authority completions, accounting for 52% of all local authority completions).
Roedd canrannau’r ddau Barc Cenedlaethol yn yr ardaloedd hynny yn uwch nag unrhyw awdurdod lleol: Arfordir Penfro (35%) ac Eryri (25%).