The need for high water quality and increased testing, many mentioning concerns about sewage being dumped into water (63 out of 148 respondents).
Yr angen am ddŵr o ansawdd uchel ac am fwy o brofi, a chyfeiriodd llawer o bobl at bryderon ynghylch carthion yn cael eu gollwng i mewn i ddŵr (63 allan o’r 148 o ymatebwyr).