Gweithredu Systemau Draenio Cynaliadwy ar Ddatblygiadau Newydd:https://ymgyngoriadau.llyw.cymru/ymgyngoriadau/gweithredu-systemau-draenio-cynaliadwy-ar-ddatblygiadau-newydd-rheolau-drafft-safonau
Implementation of Sustainable Drainage Systems on New Developments:https://consultations.gov.wales/consultations/implementation-sustainable-drainage-systems-new-developments-draft-regulations-and