The median waiting time varies from month-to-month but over the past 5 years has tended to range between 4 minutes 30 seconds and 6 minutes for red calls.
Mae canolrif yr amser aros yn amrywio o fis i fis, ond dros y 5 mlynedd diwethaf mae wedi tueddu i amrywio rhwng 4 munud 30 eiliad a 6 munud i alwadau coch.