The well is located ca. 150m south of Teampull Chaluim Chille. The OS 6-inch map does not name it, but the cairn remains visible.
See Teampull Chaluim Chille for the full discussion of this name.
RCAHMS (1928, 99) Tobar Chaluim Chille, Balivanich: ‘The well known as Tobar Chaluim Chille lies about 200 yards south by west of the Teampull on slightly higher ground. Impinging on the south side of the well is a small cairn, about 12 feet wide and 3 feet high, composed of stones carried there as votive offerings by people who came to drink of the water.’
Saints in Scottish Place-Names (DoSH)‘Tobar Chaluim Chille, South Uist (Benbecula)’