Two boreholes are to be drilled at locations in the south and east of the lsland.
If water is found deep underground, scientists will finally accept that water diviner George Langlois is able to detect sources that supposedly do not exist.
And if the tests are successful, Islanders can look forward to a future where water is plentiful and cheap to access.
But if Mr Langlois is wrong, he will be giving up altogether.
‘I shall either be retiring completely or I shall be a hero,’ he said.
Mr Langlois has long maintained that underground streams which originate in France run under the Island and are an abundant and reliable source of water.
Over the years, he and well driller Lewis de la Haye say that they have sunk deep bores and tapped into the streams to supply private water sources to a number of homes.