- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°22'5"N 3°28'38"W
- Eastings/Northings: 299500, 275500
- OS Grid: SN995755
- Mapcode Local: GBR 9K.RY77
- Mapcode Global: VH5CB.NQYT
Location and coordinates are for the approximate centre of Afon Marteg within this administrative area.
Geographic features and populated places may cross administrative borders.