- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 51°35'35"N 3°37'31"W
- Eastings/Northings: 287500, 189500
- OS Grid: SS875895
- Mapcode Local: GBR HB.BW86
- Mapcode Global: VH5H4.37Q2
Location and coordinates are for the approximate centre of Nant Cwm-du within this administrative area.
Geographic features and populated places may cross administrative borders.