- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 53°3'37"N 3°57'39"W
- Eastings/Northings: 268682, 353248
- OS Grid: SH686532
- Mapcode Local: GBR 5X.CB8Y
- Mapcode Global: WH553.4B2R
Location and coordinates are for the approximate centre of Merddwr Diwaunydd within this administrative area.
Geographic features and populated places may cross administrative borders.