- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 53°4'23"N 4°12'12"W
- Eastings/Northings: 252482, 355138
- OS Grid: SH524551
- Mapcode Local: GBR 5L.BKD7
- Mapcode Global: WH54Z.D0MX
Location and coordinates are for the approximate centre of Llyn Ffynhonnau within this administrative area.
Geographic features and populated places may cross administrative borders.