Landfill Disposals Tax replaced Landfill Tax in Wales from 1 April 2018, affecting 17 registered landfill site operators in Wales.
Mae’r Dreth Gwarediadau Tirlenwi wedi disodli’r Dreth Dirlenwi yng Nghymru ers 1 Ebrill 2018, gan effeithio ar 17 o weithredwyr safle tirlenwi cofrestredig yng Nghymru.