Two 250-deep shafts are set to be sunk in the grounds of the Royal Devon & Exeter Hospital in a bid to find water.
The hospital has been granted planning permission by the city council to sink two 80metre bore holes to provide water for its laundry.
The bore holes are exploratory but if successful the hospital has told that savings on the cost of water would be passed on to frontline services.
The hospital’s deputy director of strategic capital planning Cliff Barnes said: “This borehole is exploratory to investigate the feasibility of drawing water for our laundry.
“If testing proves it is viable, the saving we make would be passed on to frontline services.”
The bore hole would be adjacent to the laundry.