- Category: Water Feature
- Type: Other Water Feature
- Latitude/Longitude: 50°9'8"N 5°40'33"W
- Eastings/Northings: 137500, 34500
- OS Grid: SW375345
- Mapcode Local: GBR DXC8.WBF
- Mapcode Global: VH057.KFNL
Location and coordinates are for the approximate centre of Trewellard Zawn within this administrative area.
Geographic features and populated places may cross administrative borders.