- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 51°58'16"N 3°7'27"W
- Eastings/Northings: 322870, 230895
- OS Grid: SO228308
- Mapcode Local: GBR F1.KTZV
- Mapcode Global: VH6BX.SQQ7
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.