- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 50°7'48"N 5°16'53"W
- Eastings/Northings: 165564, 30707
- OS Grid: SW655307
- Mapcode Local: GBR Z0.YTY8
- Mapcode Global: VH12X.DZPQ
Location and coordinates are for the approximate centre of Tregathenan Reservoir within this administrative area.
Geographic features and populated places may cross administrative borders.