- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°14'54"N 3°41'35"W
- Eastings/Northings: 284500, 262500
- OS Grid: SN845625
- Mapcode Local: GBR Y8.0JJY
- Mapcode Global: VH5CS.XRW4
Location and coordinates are for the approximate centre of Nant yr Iau within this administrative area.
Geographic features and populated places may cross administrative borders.