WASHINGTON (AP) - A key Michigan lawmaker says he will oppose a compact to prevent the diversion of water from the Great Lakes because it allows bottled water to be shipped from the region.

Democratic Congressman Bart Stupak, who represents northern Michigan and the Upper Peninsula, said Monday the compact still has many unanswered questions and doesn't adequately protect the lakes from water diversions.

The House was expected to vote on the compact later Monday. The agreement was ratified by the Senate in August.

The agreement was negotiated by eight Great Lakes states. It prevents countries or remote states from tapping into the lakes from their natural drainage basin with rare exceptions.