Sphere of Influence (SOI) Updates

LAFCOs establish, amend, and update spheres of influence for all cities, towns, and most special districts in California to designate the territory it independently believes represents the appropriate and probable future service areas and jurisdictional boundaries of the affected agencies. Importantly, all jurisdictional changes, such as annexations and detachments, must be consistent with the spheres of the affected local agencies with limited exceptions.  Further, an increasingly important role involving sphere determinations relate to their use by regional councils of governments as planning areas in allocating housing need assignments for counties, cities, and towns.  LAFCOs must review and update all local agencies’ spheres every five years beginning in 2008.   In making sphere determinations, LAFCOs are required to prepare written statements addressing five specific planning factors listed under Government Code Section 56425.    These mandatory factors range from evaluating current and future land uses to the existence of pertinent communities of interest.    The intent in preparing the written statements is to orient LAFCOs in addressing the core principles underlying the sensible development of local agencies consistent with the anticipated needs of the affected communities.  


Fiscal Years 2019 to 2023 Study Cycle

MSR & SOI Updates FY2019-2023

MSR & SOI Updates Study Schedule FY2019-2023 (Questionnaire)

San Diego County SD SOI Updates (2019)

Julian Region SOI Updates (2019)


Fiscal Years 2013 to 2018 Study Cycle

Health Care District MSR & SOI Updates (2015)

North County Coastal-San Dieguito MSR & SOI Updates: Water/Wastewater Agencies (2013)

Ramona MWD MSR & SOI Updates (2013)


Earlier Study Cycles

County Sanitation District MSR & SOI Updates (2010/2007)

Cemetery District MSR & SOI Updates (2007)

Borrego Valley MSR & SOI Updates (2007)

Upper San Diego River MSR & SOI Updates (2006)

Draft: San Luis Rey River Watershed: Bonsall and Pala Subareas MSR & SOI Updates (2006)

Draft North Central San Diego County MSR & SOI Updates (2005)

Tijuana Watershed & Tia Juana Valley CWD MSR & SOI Updates (2004)

Southern San Diego County Water and Sewer MSR (2004)

North County Inland MSR & SOI Updates (2003)

Fire Related MSRs & SOI Updates:

Micro Report: Reorganization of Structural Fire Protection & EMS (2007)

Macro Report: Options for Providing Structural Fire Protection & EMS (2005)

Fire Protection & EMS MSR (2005)

Fire Funding Study (2003)

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