in Mid Wales Llandegfedd Reservoir, near Pontypool Llyn Brenig, in Cerrigydrudion, Conwy Llys y Fran, on the southern slopes of the Preseli Mountains in Pembrokeshire In January 2016, following the scrapping of Western Power Distribution plans to redevelop Llanishen Reservoir for housing, Welsh Water acquired both Llanishen and Lisvane Reservoirs from steel company CELSA Group on a 999-year lease, which allows the company to use them for water supply and recreational purposes while also allowing CELSA to continue to take its water supply from the Lisvane Reservoir. It has also submitted plans for the re-development of Llanishen reservoir, and its adjacent Lisvane reservoir, in the north of Cardiff in November 2020. If accepted, the redevelopment would include the construction of a visitor centre, watersports centre, biodiversity facilities, and education hub. References External links Welsh Water website Glas Cymru Water companies of the United Kingdom Companies of Wales Former nationalised industries of the United Kingdom 1974 establishments in Wales Water supply and sanitation in Wales Private companies limited by guarantee of the United Kingdom