The average (median) time spent in emergency departments was 2 minutes shorter in May compared to the previous month at two hours and thirty six minutes.
Roedd yr amser cyfartalog (canolrifol) a gafodd ei dreulio mewn adrannau brys ddau funud yn fyrrach ym mis Mai o’i gymharu â’r mis blaenorol, sef dwy awr a thri deg chwech munud.