REGULAR membership is open to city and county governments that encompass or are adjacent to DOE installations or are impacted by DOE operations. Each Regular member has a seat on the ECA Board of Directors.

ASSOCIATE membership is open to units of general local government that may be interested in membership privileges, but do not meet the requirements for regular membership.

AFFILIATE membership is open to other parties that have a stake in DOE facilities and are interested in membership privileges. Examples of Affiliate members include chambers of commerce, economic development organizations, port authorities, worker organizations, community interest groups, and councils of government.

SUPPORTING Membership is open to corporations, governmental entities, organizations and individuals that have a stake in DOE facilities and are interested in membership privileges