- Category: Populated Place
- Type: Other Settlement
- Latitude/Longitude: 50°12'8"N 5°12'12"W
- Eastings/Northings: 171500, 38500
- OS Grid: SW715385
- Mapcode Local: GBR Z4.SB8P
- Mapcode Global: VH12R.R5KR
Location and coordinates are for the approximate centre of Trethellan Water within this administrative area.
Geographic features and populated places may cross administrative borders.