Aneurin Bevan had the lowest percentage waiting longer than 12 hours in emergency departments at 8.6%, while Betsi Cadwaladr has the highest at 15.5%.
Aneurin Bevan oedd â’r ganran isaf yn aros mwy na 12 awr mewn adrannau brys, ar 8.6%, a Betsi Cadwaladr oedd â’r gyfran uchaf (15.5%).