- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 51°45'26"N 3°7'52"W
- Eastings/Northings: 322022, 207123
- OS Grid: SO220071
- Mapcode Local: GBR J0.0F3T
- Mapcode Global: VH6D2.P313
Location and coordinates are for the approximate centre of Cwmtillery Reservoir within this administrative area.
Geographic features and populated places may cross administrative borders.