The aircraft can carry 7,200 U.S. gallons (27,276 litres) of water and each drop can cover an area of up to 4 acres (1.6 hectares). The aircraft can also carry up to 600 U.S. gallons (2,270 litres) of foam concentrate for gelling the load drop. They are mainly used to fight fires along the coast of British Columbia and sometimes in the interior. As of July 29, 2010, the Martin Mars was being used to fight the Mason Lake / Bonaparte Lake fire north of Kamloops.
how much water does the mars bomber hold
7,200 U.S. gallons (27,276 litres)