To date, these have been annually increased in line with forecast inflation and have remained aligned with rates of Landfill Tax in the rest of the UK.
Hyd yma, mae’r rhain wedi’u cynyddu’n flynyddol yn unol â’r chwyddiant a ragwelir ac maent wedi parhau’n gyson â chyfraddau’r Dreth Tirlenwi yng ngweddill y DU, sef: