Personal data collected by the National Survey that can directly identify individuals will be kept in a separate database by Welsh Government where only a limited number of people can access.
Mae’r data personol a gesglir drwy’r Arolwg Cenedlaethol a all adnabod unigolyn yn cael eu cadw mewn cronfa ddata ddiogel mewn ffolder ar wahân sydd wedi'i warchod gan gyfrinair.