Vanuatu is an ocean nation in the South Pacific made of approximately 80 island. It hosts more than 20 volcanoes, several of which erupt intermittently.

Water Supply, Ambrym and Tanna

Ambrym Island is a large basaltic shield volcano in Vanuatu. Fine ashfalls from an eruption in 1953 led to ash contamination of tank water at Santo 130 kilometers from the volcano (Blong, 1984). In a 1999 study Cronin and Sharp (2002) investigated water supplies from ash-affected areas from two volcanoes (Tanna and Ambrym); only samples from Ambrym were found to have excessive Fluorine levels.