LAFCO's jurisdiction under the Cortese-Knox-Hertzberg Local Government Reorganization Act of 2000 extends to all local agencies. The Act defines local agencies as the county, cities, and special districts of Napa County. The 23 agencies that meet this definition are:

• County of Napa

• City of American Canyon
• City of Calistoga
• City of Napa
• City of St. Helena
• Town of Yountville

• American Canyon Fire Protection District
• Circle Oaks County Water District
• Congress Valley Water District
• County Service Area No. 3
• County Service Area No. 4
• Lake Berryessa Resort Improvement District
• Los Carneros Water District
• Monticello Public Cemetery District
• Napa County Flood Control and Water Conservation District
• Napa County Mosquito Abatement District
• Napa County Resource Conservation District
• Napa River Reclamation District #2109
• Napa Sanitation District
• Napa-Berryessa Resort Improvement District
• Pope Valley Cemetery District
• Silverado Community Services District
• Spanish Flat Water District

GIS data for the boundaries and spheres of these agencies is available at http://gis.napa.ca.gov/

For more information concerning these agencies, LAFCO's Directory of Agencies is available for review.