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Sphere of Influence Updates

Mendocino LAFCo is responsible for establishing, amending, and updating spheres of influence for all cities and special districts within Mendocino County. A Sphere of Influence is defined as the probable physical boundary and service area of a local agency. Territory must be within a city or district’s sphere of influence to be considered for annexation to that city or district.

Factors considered in a sphere of influence review focus on the current and future land use, the current and future need and capacity for public facilities and services and the existence of any social or economic communities of interest. Establishment of a sphere of influence helps to:

  • Ensure efficient provision of services
  • Discourage urban sprawl and the premature conversion of agricultural and open space lands and prevents overlapping jurisdictions
  • Avoid duplication of services

State law requires LAFCos to, as necessary, review and update spheres every five years. Any interested party may request Mendocino LAFCo consider a sphere of influence amendment during, or in advance of, its regular review and update schedule.

Sphere of Influence Updates


City of Fort Bragg, 2017Point Arena, 2015City of Willits, 2019City of Ukiah, 2022


Cemetery Districts

Cemetery Districts Combined MSR/SOI Update, 2017
  • Anderson Valley Cemetery District
  • Cemetery District of the Redwoods
  • Covelo Public Cemetery District
  • Hopland Cemetery District
  • Mendocino-Little River Cemetery District
  • Potter Valley Cemetery District
  • Russian River Cemetery District
  • Westport-Ten Mile Cemetery District

Community Services Districts

Anderson Valley Community Services District, 2015Brooktrails Township Community Services District, 2019Covelo Community Services District, 2021Gualala Community Services District, 2016Mendocino City Community Services District, 2020

Fire Districts

Fort Bragg Rural Fire Protection District, 2019Redwood Coast Fire Protection District, 2018Ukiah Valley Fire District, 2021


Multi-District Fire Protection Districts, 2018
  • Albion Little River Fire Protection District
  • Comptche Community Services District
  • Covelo Fire Protection District
  • Elk Community Services District
  • Hopland Fire Protection District
  • Leggett Valley Fire Protection District
  • Little Lake Fire Protection District
  • Long Valley Fire Protection District
  • Mendocino Fire Protection District
  • Piercy Fire Protection District
  • Potter Valley Community Services District
  • Redwood Valley-Calpella Fire Protection District
  • South Coast Fire Protection District

Water Districts

Calpella County Water District, 2016Caspar South Water District, 2015Elk County Water District, 2015Irish Beach Water District, 2016Laytonville County Water District, 2015Millview County Water District, 2016Pacific Reefs Water District, 2015Redwood Valley County Water District, 2016Round Valley County Water District, 2016Westport County Water District, 2015Willow County Water District, 2016Mutual Water Companies Report, 2018

Other Districts

County Service Area (CSA) No. 3, 2022Hopland Public Utility District, 2016Mendocino Coast Health Care District, 2016Mendocino Coast Recreation and Park District, 2008Mendocino County Resource Conservation District, 2016Noyo Harbor District, 2016Potter Valley Irrigation District, 2016Russian River Flood Control and Watershed Conservation Improvement District, 2017Ukiah Valley Sanitation District, 2022


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