California's Alameda County is geographically large, encompassing 15+ towns and cities and about 100 NA meetings each week. In order to better serve the groups, the county is broken down into three Areas for most service functions; East Bay Central, East Bay North, and Mission Peak. 

The Area Service committees are comprised of Group Service Representatives (GSRs) representing local Groups and other elected volunteers who provide administrative and task-based support.  Areas provide literature services, meeting outreach, local activities and general group support. 

Committees known as Tri-Area committees serve all three Areas for functions that are best coordinated at county level. The Alameda County Tri-Area service committees are Hospitals and Institutions, Public Relations, and Unity Day .