- Category: Water Feature
- Type: Wetland
- Latitude/Longitude: 52°6'15"N 4°41'17"W
- Eastings/Northings: 215990, 248509
- OS Grid: SN159485
- Mapcode Local: GBR CY.9PR1
- Mapcode Global: VH2MN.PCDR
Location and coordinates are for the approximate centre of Pen yr Ergyd within this administrative area.
Geographic features and populated places may cross administrative borders.