- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°49'53"N 3°47'24"W
- Eastings/Northings: 279500, 327500
- OS Grid: SH795275
- Mapcode Local: GBR 64.TPTQ
- Mapcode Global: WH67G.R3D3
Location and coordinates are for the approximate centre of Nant yr Helyg within this administrative area.
Geographic features and populated places may cross administrative borders.