- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°32'43"N 3°40'30"W
- Eastings/Northings: 286500, 295500
- OS Grid: SN865955
- Mapcode Local: GBR 99.DPSY
- Mapcode Global: VH5BG.78YZ
Location and coordinates are for the approximate centre of Llyn Nant-ddeiliog within this administrative area.
Geographic features and populated places may cross administrative borders.