- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°14'32"N 3°36'12"W
- Eastings/Northings: 290611, 261687
- OS Grid: SN906616
- Mapcode Local: GBR YD.0W86
- Mapcode Global: VH5CV.HWBS
Location and coordinates are for the approximate centre of Cronfa Ddwr Dolymynach within this administrative area.
Geographic features and populated places may cross administrative borders.