Florida gets much of its drinking water from the Floridan Aquifer and the Biscayne Aquifer , as well as from surface water from Lake Okeechobee and other lakes , but population increases have begun to strain available sources . Florida obtains much of its drinking water from the Floridan Aquifer and the Biscayne Aquifer , as well as from surface water from Lake Okeechobee and other lakes , but population increases have begun to strain available sources .