Mae Deddf Cymru 2014, a gafodd ei phasio’n ddiweddar gan Senedd y DU, yn rhoi pwerau trethu a benthyca  newydd i Gymru. Fel rhan o’r pecyn hwn o fesurau cyllidol, caiff y Dreth Dirlenwi ei datganoli i Gymru o fis Ebrill 2018. Mae Llywodraeth Cymru’n bwriadu disodli’r dreth hon â Threth Gwarediadau Tirlenwi.
The Wales Act 2014, which was recently passed by Parliament, provides Wales with new tax and borrowing powers. As part of this package of fiscal measures, Landfill Tax will be devolved to Wales from April 2018. The Welsh Government propose replacing this tax with Landfill Disposals Tax (LDT)