- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°15'44"N 3°57'27"W
- Eastings/Northings: 266500, 264500
- OS Grid: SN665645
- Mapcode Local: GBR 8Y.ZL6N
- Mapcode Global: VH4G6.CD5G
Location and coordinates are for the approximate centre of Nant yr Efail within this administrative area.
Geographic features and populated places may cross administrative borders.