Sphere of Influence Updates

A central planning responsibility for LAFCO is the determination of a sphere of influence for each local agency under its jurisdiction. LAFCO establishes, amends, and updates spheres of influence to designate the territory it believes represents the appropriate future service area and jurisdictional boundary of the affected agency. All jurisdictional changes, such as annexations and detachments, must be consistent with the spheres of influence of the affected local agencies with limited exceptions. LAFCO reviews and updates each local agency’s sphere every five years as needed.

Cities

SOI & MSR South County Region 2018 SOI & MSR Town of Yountville 2017 SOI & MSR City of Calistoga 2016 SOI City of Napa 2014 SOI City of American Canyon 2010 SOI City of Calistoga 2008 SOI City of St. Helena 2008 SOI Town of Yountville 2007 SOI City of Napa 2005 SOI City of American Canyon 2003

Special Districts

SOI & MSR Silverado Community Services District 2022 SOI 2021 Reviews for Circle Oaks Water District, Congress Valley Water District, Los Carneros Water District, Napa County Flood Control and Water Conservation District, and Napa River Reclamation District No. 2109 SOI Lake Berryessa Resort Improvement District 2021 SOI & MSR Napa County Regional Park and Open Space District 2019 SOI & MSR South County Region 2018 SOI & MSR Napa County Mosquito Abatement District 2017 SOI & MSR Congress Valley Water District 2017 SOI & MSR County Service Area No. 4 2017 SOI & MSR Monticelllo Public Cemetary District 2016 SOI & MSR Circle Oaks County Water District 2016 SOI & MSR Napa County Resource Conservation District 2016 SOI & MSR Napa River Reclamation District No. 2109 2016 SOI & MSR Napa County Flood Control and Water Conservation District 2016 SOI & MSR Los Carneros Water District 2016 SOI Silverado Community Services District 2015 SOI Napa Sanitation District 2015 SOI Napa Berryessa Resort Improvement District 2013 SOI Spanish Flat Water District 2013 SOI Lake Berryessa Resort Improvement District 2012 SOI County Service Area No. 3 2012 SOI American Canyon Fire Protection District 2010 SOI & MSR County Service Area No. 4 2010 SOI & MSR Napa County Mosquito Abatement District 2010 SOI & MSR Napa County Regional Park and Open Space District 2010 SOI Congress Valley Water District Updated 2008 SOI Pope Valley Cemetery District 2008 SOI American Canyon Fire Protection District 2007 SOI County Service Area No. 3 2007 SOI Lake Berryessa Resort Improvement District 2007 SOI Napa-Berryessa Resort Improvement District 2007 SOI Los Carneros Water District 2007 SOI Napa County Flood Control and Water Conservation District 2007 SOI Circle Oaks County Water District 2007 SOI Napa River Reclamation District No. 2109 2007 SOI Spanish Flat Water District 2007 SOI Napa Sanitation District 2006 SOI Napa County Mosquito Abatement District 2005

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