- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 52°46'30"N 3°57'2"W
- Eastings/Northings: 268500, 321500
- OS Grid: SH685215
- Mapcode Local: GBR 5Y.Y6R8
- Mapcode Global: WH56G.8HXY
Location and coordinates are for the approximate centre of Afon Cwm-mynach within this administrative area.
Geographic features and populated places may cross administrative borders.