The abnormally warm groundwater flowing from a number of shallow wells in the village of Kollafjørður on Streymoy in the Faroe Islands, is most likely not older than five years old. This is one of the conclusions in a new article that was recently sent to the journal Renewable Energy. The conclusion is based on tritium analysis which were made on groundwater from an adjacent well in Vestmanna. Additionally tritium analyses were made on samples from both warm and cold springs from around the islands. The results indicated that the water is between half a year and three years old. This may mean that the Faroese groundwater magazines are refilling rapidly.

Oxygen isotope analyses from the Vestmanna-1 well have showed that the groundwater flowing in the well is meteoric. Therefore, it is likely to conclude that the artisan groundwater flowing in Kollafjørður is also rainwater that has participated through fractures and cracks into the ground. In the future, the plan is to do more studies on the water in Kollafjørður and hopefully the results will show that the water is suitable as drinking water.