Local Authorities are also required to display further information in the form of water quality classification symbols during the bathing season at each identified bathing water.
Mae’n ofynnol hefyd i awdurdodau lleol arddangos rhagor o wybodaeth ym mhob safle dŵr ymdrochi dynodedig yn ystod y tymor ymdrochi ar ffurf symbolau dosbarthu ansawdd dŵr.