- Category: Geographic Feature
- Type: Valley
- Latitude/Longitude: 51°58'12"N 3°41'25"W
- Eastings/Northings: 283976, 231526
- OS Grid: SN839315
- Mapcode Local: GBR Y8.L57Y
- Mapcode Global: VH5F4.ZRD2
Location and coordinates are for the approximate centre of Cwm Treddfin within this administrative area.
Geographic features and populated places may cross administrative borders.