In 2018-19, 11% were concerned about the risk of flooding to their property, 28% to their local area, and 62% to other parts of Wales.
Yn 2018-19, roedd 11% yn pryderu am y perygl o lifogydd i'w heiddo, 28% i'w hardal leol, a 62% i rannau eraill o Gymru.