- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°14'59"N 3°36'19"W
- Eastings/Northings: 290500, 262500
- OS Grid: SN905625
- Mapcode Local: GBR YD.0G9X
- Mapcode Global: VH5CV.GQB6
Location and coordinates are for the approximate centre of Nant Gwyllt within this administrative area.
Geographic features and populated places may cross administrative borders.