Aneurin Bevan had the lowest percentage waiting longer than 12 hours in emergency departments at 8.8%, while Betsi Cadwaladr has the highest at 19.6%.
Aneurin Bevan oedd â’r ganran isaf yn aros mwy na 12 awr mewn adrannau brys, ar 8.8%, a Betsi Cadwaladr oedd â’r gyfran uchaf (19.6%).