- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°23'45"N 3°54'48"W
- Eastings/Northings: 269905, 279279
- OS Grid: SN699792
- Mapcode Local: GBR 8Z.Q546
- Mapcode Global: VH4FN.31ZK
Location and coordinates are for the approximate centre of Cwm Rheidol Reservoir within this administrative area.
Geographic features and populated places may cross administrative borders.