Latest data on the status of surface and ground water shows that 40% of 933 surface and ground water bodies were at good or better status in 2021.
Mae’r data diweddaraf ar statws dŵr wyneb a dŵr daear yn dangos bod 40% o 933 o gyrff dŵr wyneb a dŵr daear mewn cyflwr da neu well yn 2021.