- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°53'26"N 4°0'52"W
- Eastings/Northings: 264555, 334467
- OS Grid: SH645344
- Mapcode Local: GBR 5V.PWTG
- Mapcode Global: WH55V.9LHV
Location and coordinates are for the approximate centre of Llyn Eiddew-bach within this administrative area.
Geographic features and populated places may cross administrative borders.