The Great Lakes Caucus is comprised of WMAN participants that surround the Great Lakes, in  the U.S. and Canada. The Great Lakes provide clean drinking water and recreation for millions of people and our work collectively protects these fresh water bodies from mining contamination and addresses mining in the following states: Michigan, Wisconsin, Illinois, New York and Minnesota and to the north in Canada: Ontario and Manitoba.

Members share information, alerts, and opportunities for public comment; collaborate; share resources; and provide mutual support. The Caucus has an e-mail list and monthly calls.