- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 51°49'36"N 3°22'35"W
- Eastings/Northings: 305228, 215123
- OS Grid: SO052151
- Mapcode Local: GBR YP.W52S
- Mapcode Global: VH6CK.FC80
Location and coordinates are for the approximate centre of Pentwyn Reservoir within this administrative area.
Geographic features and populated places may cross administrative borders.