- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°3'34"N 3°42'2"W
- Eastings/Northings: 283500, 241500
- OS Grid: SN835415
- Mapcode Local: GBR Y8.DGNX
- Mapcode Global: VH5DR.SHZG
Location and coordinates are for the approximate centre of Nant Hirgwm within this administrative area.
Geographic features and populated places may cross administrative borders.