This is not evenly distributed across Wales, 73% of people in Blaenau Gwent and 67% in Merthyr Tydfil say fly-tipping is a problem compared with 17% of people in Ceredigion and Denbighshire.
Mae 73% o bobl ym Mlaenau Gwent a 67% ym Merthyr Tudful yn dweud bod tipio anghyfreithlon yn broblem o'i gymharu â 17% o bobl yng Ngheredigion a Sir Ddinbych.