- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°49'9"N 3°59'50"W
- Eastings/Northings: 265500, 326500
- OS Grid: SH655265
- Mapcode Local: GBR 5W.VFGL
- Mapcode Global: WH567.KDQK
Location and coordinates are for the approximate centre of Llyn Perfeddau within this administrative area.
Geographic features and populated places may cross administrative borders.