- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 51°58'3"N 3°7'46"W
- Eastings/Northings: 322500, 230500
- OS Grid: SO225305
- Mapcode Local: GBR F1.L6C2
- Mapcode Global: VH6BX.PTY1
Location and coordinates are for the approximate centre of Grwyne Fawr Reservoir within this administrative area.
Geographic features and populated places may cross administrative borders.