Aneurin Bevan had the lowest percentage waiting longer than 12 hours in emergency departments at 7.0%, while Betsi Cadwaladr has the highest at 16.9%.
Aneurin Bevan oedd â’r ganran isaf yn aros mwy na 12 awr mewn adrannau brys, ar 7.0%, a Betsi Cadwaladr oedd â’r gyfran uchaf (16.9%).