- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 53°4'34"N 4°12'11"W
- Eastings/Northings: 252500, 355500
- OS Grid: SH525555
- Mapcode Local: GBR 5L.BCF8
- Mapcode Global: WH54S.DYN0
Location and coordinates are for the approximate centre of Llyn Ffynhonnau within this administrative area.
Geographic features and populated places may cross administrative borders.