Roedd cwestiwn am sŵn am y tro cyntaf yn Arolwg Cenedlaethol i Gymru 2017-18. Gofynnwyd i bobl a oedd sŵn o’r tu allan i’w cartref wedi bod yn eu poeni’n rheolaidd yn ystod y 12 mis blaenorol. Dywedodd 24% ei fod wedi. O'r rhain, dywedodd:
A question on noise was included in the National Survey for Wales for the first time in 2017-18. People were asked whether they had regularly been bothered by noise from outside their home in the previous 12 months. 24% said they had. Of these: